Patent
US 8,795,899Lithium Super-Battery with a Functionalized Nano Graphene Cathode
Chenguang Liu, David Neff, Aruna Zhamu, Bor Z. Jang
US
Copyright © 2026 Matter42. All rights reserved.
Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (A) a lithium super-battery cell with a lithium metal anode and a cathode made of functionalized NGPs and/or functionalized exfoliated graphite; (B) a …
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
FIG.3 (a) cyclic voltammograms of a lithium super-battery formed of a Li metal anode and a functionalized graphene cathode at two different scan rates.
FIG.4. Ragone plot of several functionalized graphene-based lithium super-batteries and a ca r bon nano-tube-based lithium super-battery. 5
FIG.5. Ragone plot of several functionalized graphene-based lithium super-batteries containing NGPs of different thicknesses or numbers of layers.
FIG.6 Capacity decay over time for two lithium super-batteries featuring functionalized exfoliated graphite of different oxygen contents (hence, different …
FIG.7 (a) Some of the desired functional groups at the edge or basal plane surface of NGPs; (b) A scientifically plausible lithium ion exchange mechanism.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A lithium super-battery or lithium-exchanging battery device comprising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium-containing electrolyte in physical contact with the two electrodes, wherein the positive electrode comprises a plurality of chemically f un ctionalized nano graphene platelets or exfoliated graphite having a f un ctional group that reversibly reacts with a lithium atom or ion wherein said nano graphene platelets or exfoliated rap hite contain an oxygen amount of at least 1% by weight or have a platelet less than 10 num in thickness or havin g, no greater than 20 grap hene planes.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have a functional group selected from -COOH, = 0, -OH, -NH2, an oxygen-containing group attached to a carbon atom at a graphene platelet,-OR, or -COOR, where R is a hydrocarbon radical.
(Previously amended) The lithium super-battery device of claim 1 wherein said negative electrode comprises an electrode active material capable of absorbing or desorbing lithium.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode comprises nano graphene platelets or exfoliated graphite having a functional group selected from -COOH, = 0, -OH, -N H 2, -OR, -COOR, or an oxygen-containing group attached to a carbon atom at a graphene platelet, where R is a hydrocarbon radical and wherein the negative electrode comprises an electrode active material capable of absorbing or desorbing lithium.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 5% to 45% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 5% to 25% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 10% to 20% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said electrolyte comprises a lithium salt-doped ionic liquid.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets comprise a few-layer graphene platelet formed of 3-7 graphene planes.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets comprise curved graphene platelets.
(Previously amended) The lithium super-battery device of claim 1 wherein at least one of the two electrodes further comprises a nano material selected from a carbon nano-tube, carbon nanofiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber, or a combination thereof.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 200 Wh/k g and power density no lower than 45 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 300 Wh/k g and power density no lower than 25 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 500 Wh/k g and power density no less than 15 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 10 pm.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 50 gm.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 100 pm. 6
(Previously amended) The lithium super-battery device of claim -7, wherein the lithium intercalation compound is selected from the following groups of materials, which are capable of absorbing or desorbing lithium ions or atoms: (a) Silicon (Si), germanium (Ge), tin (Sn), lead (Pb), antimony (Sb), bismuth (Bi), zinc (Zn), aluminum (Al), Titanium (Ti), cadmium (Cd), and mixtures thereof; (b) Alloys or intermetallic compounds of Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Ti, or Cd; (c) Oxides, carbides, nitrides, sulfides, phosphides, selenides, tellurides, or antimonides of Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Fe, Ti, Mn, or Cd and mixtures or composites thereof; and (d) Salts or hydroxides of Sn
A lithium supe r-battery device com p rising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium- 4 containing electrol yt e in physical contact with the two electrodes, wherein the positive electrode comprises a plurali t y of chemically f u nctionalized nano grap hene platelets or exfoliated grap hite having a f un ctional arou p that reversibly reacts with a lithium atom or ion wherein said nano ra hene platelets or exfoliated gaphi te co mpri se single-la yer grap hene.
A lithium s u per-battery device comprising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium- containing electrol yt e in physical contact with the two electrodes, wherein the positive electrode comprises a plurali t y of chemically f un ctionalized nano gra phene platelets or exfoliated rap hite having a functional g r oup that reversibly reacts with a lithium atom or ion wherein said nano grap hene platelets or exfoliated rap hite comprise a few-layer graphene platelet formed of 2-10 graphene planes.
Layer stacks claimed or described, ordered top of device to substrate.
lithium super-battery/lithium-exchanging battery
Materials described outside the worked examples.
chemically functionalized nano graphene platelets
exfoliated graphite
porous separator
lithium-containing electrolyte
electrode active material capable of absorbing or desorbing lithium
lithium metal/lithium metal alloy/lithiated compound/lithiated titanium dioxide/lithium titanate/lithium manganate/lithium transition metal oxide
Li₄Ti₅O₁₂
lithium intercalation compound (Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Ti, Cd or alloys/oxides/carbides/nitrides/sulfides/phosphides/selenides/tellurides/antimonides thereof, or Sn salts/hydroxides)
lithium cobalt oxide/lithium nickel oxide/lithium manganese oxide/lithium vanadium oxide/lithium mixed metal oxide/lithium iron phosphate/lithium vanadium phosphate/lithium manganese phosphate/lithium transition metal phosphate/lithium mixed metal phosphate/lithiated metal sulfide
single-layer graphene
few-layer graphene platelet (2-10 graphene planes)
nano material (carbon nano-tube, carbon nanofiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber)
Measurements and analyses referenced in the patent, with their drawing references.
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
gravimetric energy density (preferred embodiment, f-NGP positive/Li4Ti5O12 negative) | — | chemically functionalized nano graphene plateletsLi₄Ti₅O₁₂ |
gravimetric power density (preferred embodiment, f-NGP positive/Li4Ti5O12 negative) | — | chemically functionalized nano graphene plateletsLi₄Ti₅O₁₂ |
claimed minimum energy density (claim 25) | — | — |
claimed minimum power density (claim 25) | — | — |
claimed minimum energy density (claim 26) | — | — |
claimed minimum power density (claim 26) | — | — |
claimed minimum energy density (claim 27) | — | — |
claimed minimum power density (claim 27) | — | — |
Duration | 15–60 seconds | — |
Duration | 10–120 minutes | — |
Thickness | ≤ 1 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 10 nm | — |
Thickness | ≥ 5 nm | — |
Thickness | ≥ 2 nm | — |
Duration | ≥ 24 hours | — |
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Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (A) a lithium super-battery cell with a lithium metal anode and a cathode made of functionalized NGPs and/or functionalized exfoliated graphite; (B) a …
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
FIG.3 (a) cyclic voltammograms of a lithium super-battery formed of a Li metal anode and a functionalized graphene cathode at two different scan rates.
FIG.4. Ragone plot of several functionalized graphene-based lithium super-batteries and a ca r bon nano-tube-based lithium super-battery. 5
FIG.5. Ragone plot of several functionalized graphene-based lithium super-batteries containing NGPs of different thicknesses or numbers of layers.
FIG.6 Capacity decay over time for two lithium super-batteries featuring functionalized exfoliated graphite of different oxygen contents (hence, different …
FIG.7 (a) Some of the desired functional groups at the edge or basal plane surface of NGPs; (b) A scientifically plausible lithium ion exchange mechanism.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A lithium super-battery or lithium-exchanging battery device comprising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium-containing electrolyte in physical contact with the two electrodes, wherein the positive electrode comprises a plurality of chemically f un ctionalized nano graphene platelets or exfoliated graphite having a f un ctional group that reversibly reacts with a lithium atom or ion wherein said nano graphene platelets or exfoliated rap hite contain an oxygen amount of at least 1% by weight or have a platelet less than 10 num in thickness or havin g, no greater than 20 grap hene planes.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have a functional group selected from -COOH, = 0, -OH, -NH2, an oxygen-containing group attached to a carbon atom at a graphene platelet,-OR, or -COOR, where R is a hydrocarbon radical.
(Previously amended) The lithium super-battery device of claim 1 wherein said negative electrode comprises an electrode active material capable of absorbing or desorbing lithium.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode comprises nano graphene platelets or exfoliated graphite having a functional group selected from -COOH, = 0, -OH, -N H 2, -OR, -COOR, or an oxygen-containing group attached to a carbon atom at a graphene platelet, where R is a hydrocarbon radical and wherein the negative electrode comprises an electrode active material capable of absorbing or desorbing lithium.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 5% to 45% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 5% to 25% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 10% to 20% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said electrolyte comprises a lithium salt-doped ionic liquid.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets comprise a few-layer graphene platelet formed of 3-7 graphene planes.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets comprise curved graphene platelets.
(Previously amended) The lithium super-battery device of claim 1 wherein at least one of the two electrodes further comprises a nano material selected from a carbon nano-tube, carbon nanofiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber, or a combination thereof.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 200 Wh/k g and power density no lower than 45 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 300 Wh/k g and power density no lower than 25 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 500 Wh/k g and power density no less than 15 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 10 pm.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 50 gm.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 100 pm. 6
(Previously amended) The lithium super-battery device of claim -7, wherein the lithium intercalation compound is selected from the following groups of materials, which are capable of absorbing or desorbing lithium ions or atoms: (a) Silicon (Si), germanium (Ge), tin (Sn), lead (Pb), antimony (Sb), bismuth (Bi), zinc (Zn), aluminum (Al), Titanium (Ti), cadmium (Cd), and mixtures thereof; (b) Alloys or intermetallic compounds of Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Ti, or Cd; (c) Oxides, carbides, nitrides, sulfides, phosphides, selenides, tellurides, or antimonides of Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Fe, Ti, Mn, or Cd and mixtures or composites thereof; and (d) Salts or hydroxides of Sn
A lithium supe r-battery device com p rising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium- 4 containing electrol yt e in physical contact with the two electrodes, wherein the positive electrode comprises a plurali t y of chemically f u nctionalized nano grap hene platelets or exfoliated grap hite having a f un ctional arou p that reversibly reacts with a lithium atom or ion wherein said nano ra hene platelets or exfoliated gaphi te co mpri se single-la yer grap hene.
A lithium s u per-battery device comprising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium- containing electrol yt e in physical contact with the two electrodes, wherein the positive electrode comprises a plurali t y of chemically f un ctionalized nano gra phene platelets or exfoliated rap hite having a functional g r oup that reversibly reacts with a lithium atom or ion wherein said nano grap hene platelets or exfoliated rap hite comprise a few-layer graphene platelet formed of 2-10 graphene planes.
Layer stacks claimed or described, ordered top of device to substrate.
lithium super-battery/lithium-exchanging battery
Materials described outside the worked examples.
chemically functionalized nano graphene platelets
exfoliated graphite
porous separator
lithium-containing electrolyte
electrode active material capable of absorbing or desorbing lithium
lithium metal/lithium metal alloy/lithiated compound/lithiated titanium dioxide/lithium titanate/lithium manganate/lithium transition metal oxide
Li₄Ti₅O₁₂
lithium intercalation compound (Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Ti, Cd or alloys/oxides/carbides/nitrides/sulfides/phosphides/selenides/tellurides/antimonides thereof, or Sn salts/hydroxides)
lithium cobalt oxide/lithium nickel oxide/lithium manganese oxide/lithium vanadium oxide/lithium mixed metal oxide/lithium iron phosphate/lithium vanadium phosphate/lithium manganese phosphate/lithium transition metal phosphate/lithium mixed metal phosphate/lithiated metal sulfide
single-layer graphene
few-layer graphene platelet (2-10 graphene planes)
nano material (carbon nano-tube, carbon nanofiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber)
Measurements and analyses referenced in the patent, with their drawing references.
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
gravimetric energy density (preferred embodiment, f-NGP positive/Li4Ti5O12 negative) | — | chemically functionalized nano graphene plateletsLi₄Ti₅O₁₂ |
gravimetric power density (preferred embodiment, f-NGP positive/Li4Ti5O12 negative) | — | chemically functionalized nano graphene plateletsLi₄Ti₅O₁₂ |
claimed minimum energy density (claim 25) | — | — |
claimed minimum power density (claim 25) | — | — |
claimed minimum energy density (claim 26) | — | — |
claimed minimum power density (claim 26) | — | — |
claimed minimum energy density (claim 27) | — | — |
claimed minimum power density (claim 27) | — | — |
Duration | 15–60 seconds | — |
Duration | 10–120 minutes | — |
Thickness | ≤ 1 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 10 nm | — |
Thickness | ≥ 5 nm | — |
Thickness | ≥ 2 nm | — |
Duration | ≥ 24 hours | — |
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Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (A) a lithium super-battery cell with a lithium metal anode and a cathode made of functionalized NGPs and/or functionalized exfoliated graphite; (B) a …
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
FIG.3 (a) cyclic voltammograms of a lithium super-battery formed of a Li metal anode and a functionalized graphene cathode at two different scan rates.
FIG.4. Ragone plot of several functionalized graphene-based lithium super-batteries and a ca r bon nano-tube-based lithium super-battery. 5
FIG.5. Ragone plot of several functionalized graphene-based lithium super-batteries containing NGPs of different thicknesses or numbers of layers.
FIG.6 Capacity decay over time for two lithium super-batteries featuring functionalized exfoliated graphite of different oxygen contents (hence, different …
FIG.7 (a) Some of the desired functional groups at the edge or basal plane surface of NGPs; (b) A scientifically plausible lithium ion exchange mechanism.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A lithium super-battery or lithium-exchanging battery device comprising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium-containing electrolyte in physical contact with the two electrodes, wherein the positive electrode comprises a plurality of chemically f un ctionalized nano graphene platelets or exfoliated graphite having a f un ctional group that reversibly reacts with a lithium atom or ion wherein said nano graphene platelets or exfoliated rap hite contain an oxygen amount of at least 1% by weight or have a platelet less than 10 num in thickness or havin g, no greater than 20 grap hene planes.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have a functional group selected from -COOH, = 0, -OH, -NH2, an oxygen-containing group attached to a carbon atom at a graphene platelet,-OR, or -COOR, where R is a hydrocarbon radical.
(Previously amended) The lithium super-battery device of claim 1 wherein said negative electrode comprises an electrode active material capable of absorbing or desorbing lithium.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode comprises nano graphene platelets or exfoliated graphite having a functional group selected from -COOH, = 0, -OH, -N H 2, -OR, -COOR, or an oxygen-containing group attached to a carbon atom at a graphene platelet, where R is a hydrocarbon radical and wherein the negative electrode comprises an electrode active material capable of absorbing or desorbing lithium.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 5% to 45% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 5% to 25% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 10% to 20% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said electrolyte comprises a lithium salt-doped ionic liquid.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets comprise a few-layer graphene platelet formed of 3-7 graphene planes.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets comprise curved graphene platelets.
(Previously amended) The lithium super-battery device of claim 1 wherein at least one of the two electrodes further comprises a nano material selected from a carbon nano-tube, carbon nanofiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber, or a combination thereof.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 200 Wh/k g and power density no lower than 45 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 300 Wh/k g and power density no lower than 25 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 500 Wh/k g and power density no less than 15 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 10 pm.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 50 gm.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 100 pm. 6
(Previously amended) The lithium super-battery device of claim -7, wherein the lithium intercalation compound is selected from the following groups of materials, which are capable of absorbing or desorbing lithium ions or atoms: (a) Silicon (Si), germanium (Ge), tin (Sn), lead (Pb), antimony (Sb), bismuth (Bi), zinc (Zn), aluminum (Al), Titanium (Ti), cadmium (Cd), and mixtures thereof; (b) Alloys or intermetallic compounds of Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Ti, or Cd; (c) Oxides, carbides, nitrides, sulfides, phosphides, selenides, tellurides, or antimonides of Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Fe, Ti, Mn, or Cd and mixtures or composites thereof; and (d) Salts or hydroxides of Sn
A lithium supe r-battery device com p rising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium- 4 containing electrol yt e in physical contact with the two electrodes, wherein the positive electrode comprises a plurali t y of chemically f u nctionalized nano grap hene platelets or exfoliated grap hite having a f un ctional arou p that reversibly reacts with a lithium atom or ion wherein said nano ra hene platelets or exfoliated gaphi te co mpri se single-la yer grap hene.
A lithium s u per-battery device comprising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium- containing electrol yt e in physical contact with the two electrodes, wherein the positive electrode comprises a plurali t y of chemically f un ctionalized nano gra phene platelets or exfoliated rap hite having a functional g r oup that reversibly reacts with a lithium atom or ion wherein said nano grap hene platelets or exfoliated rap hite comprise a few-layer graphene platelet formed of 2-10 graphene planes.
Layer stacks claimed or described, ordered top of device to substrate.
lithium super-battery/lithium-exchanging battery
Materials described outside the worked examples.
chemically functionalized nano graphene platelets
exfoliated graphite
porous separator
lithium-containing electrolyte
electrode active material capable of absorbing or desorbing lithium
lithium metal/lithium metal alloy/lithiated compound/lithiated titanium dioxide/lithium titanate/lithium manganate/lithium transition metal oxide
Li₄Ti₅O₁₂
lithium intercalation compound (Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Ti, Cd or alloys/oxides/carbides/nitrides/sulfides/phosphides/selenides/tellurides/antimonides thereof, or Sn salts/hydroxides)
lithium cobalt oxide/lithium nickel oxide/lithium manganese oxide/lithium vanadium oxide/lithium mixed metal oxide/lithium iron phosphate/lithium vanadium phosphate/lithium manganese phosphate/lithium transition metal phosphate/lithium mixed metal phosphate/lithiated metal sulfide
single-layer graphene
few-layer graphene platelet (2-10 graphene planes)
nano material (carbon nano-tube, carbon nanofiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber)
Measurements and analyses referenced in the patent, with their drawing references.
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
gravimetric energy density (preferred embodiment, f-NGP positive/Li4Ti5O12 negative) | — | chemically functionalized nano graphene plateletsLi₄Ti₅O₁₂ |
gravimetric power density (preferred embodiment, f-NGP positive/Li4Ti5O12 negative) | — | chemically functionalized nano graphene plateletsLi₄Ti₅O₁₂ |
claimed minimum energy density (claim 25) | — | — |
claimed minimum power density (claim 25) | — | — |
claimed minimum energy density (claim 26) | — | — |
claimed minimum power density (claim 26) | — | — |
claimed minimum energy density (claim 27) | — | — |
claimed minimum power density (claim 27) | — | — |
Duration | 15–60 seconds | — |
Duration | 10–120 minutes | — |
Thickness | ≤ 1 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 10 nm | — |
Thickness | ≥ 5 nm | — |
Thickness | ≥ 2 nm | — |
Duration | ≥ 24 hours | — |
Related documents with shared materials, methods, properties, or citations.
Spacer-modified graphene electrode for supercapacitor
Aluminum Secondary Battery Cathode Having Oriented Graphene
MOLYBDENUM DISULFIDE/GRAPHENE/CARBON COMPOSITE MATERIAL AND USE THEREOF
POROUS PARTICLES OF INTERCONNECTED 3D GRAPHENE AS A SUPERCAPACITOR ELECTRODE ACTIVE MATERIAL AND PRODUCTION PROCESS
SPACER-MODIFIED NANO GRAPHENE ELECTRODES FOR SUPERCAPACITORS
Continuous process for producing spacer-modified nano Graphene electrodes for supercapacitors
METHOD FOR MANUFACTURING GRAPHENE-COATED OBJECT, NEGATIVE ELECTRODE OF SECONDARY BATTERY INCLUDING GRAPHENE-COATED OBJECT, AND SECONDARY BATTERY INCLUDING THE NEGATIVE ELECTRODE
GRAPHENE-ENCAPSULATED ELECTROACTIVE MATERIAL FOR USE IN A LITHIUM ION ELECTROCHEMICAL CELL
Conductive Polymer Binder for a Novel Silicon/Graphene Anode in Lithium Ion Batteries
Electrochemical production of graphene sheets directly from graphite mineral
Multi-Level Graphene-Protected Anode Active Material Particles for Battery Applications
GRAPHENE-PROTECTED LEAD ACID BATTERIES
Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG.1 (A) a lithium super-battery cell with a lithium metal anode and a cathode made of functionalized NGPs and/or functionalized exfoliated graphite; (B) a …
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
FIG.3 (a) cyclic voltammograms of a lithium super-battery formed of a Li metal anode and a functionalized graphene cathode at two different scan rates.
FIG.4. Ragone plot of several functionalized graphene-based lithium super-batteries and a ca r bon nano-tube-based lithium super-battery. 5
FIG.5. Ragone plot of several functionalized graphene-based lithium super-batteries containing NGPs of different thicknesses or numbers of layers.
FIG.6 Capacity decay over time for two lithium super-batteries featuring functionalized exfoliated graphite of different oxygen contents (hence, different …
FIG.7 (a) Some of the desired functional groups at the edge or basal plane surface of NGPs; (b) A scientifically plausible lithium ion exchange mechanism.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A lithium super-battery or lithium-exchanging battery device comprising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium-containing electrolyte in physical contact with the two electrodes, wherein the positive electrode comprises a plurality of chemically f un ctionalized nano graphene platelets or exfoliated graphite having a f un ctional group that reversibly reacts with a lithium atom or ion wherein said nano graphene platelets or exfoliated rap hite contain an oxygen amount of at least 1% by weight or have a platelet less than 10 num in thickness or havin g, no greater than 20 grap hene planes.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have a functional group selected from -COOH, = 0, -OH, -NH2, an oxygen-containing group attached to a carbon atom at a graphene platelet,-OR, or -COOR, where R is a hydrocarbon radical.
(Previously amended) The lithium super-battery device of claim 1 wherein said negative electrode comprises an electrode active material capable of absorbing or desorbing lithium.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode comprises nano graphene platelets or exfoliated graphite having a functional group selected from -COOH, = 0, -OH, -N H 2, -OR, -COOR, or an oxygen-containing group attached to a carbon atom at a graphene platelet, where R is a hydrocarbon radical and wherein the negative electrode comprises an electrode active material capable of absorbing or desorbing lithium.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 5% to 45% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 5% to 25% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets or exfoliated graphite have an oxygen content in the range of 10% to 20% by weight based on the total graphene platelet weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said electrolyte comprises a lithium salt-doped ionic liquid.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets comprise a few-layer graphene platelet formed of 3-7 graphene planes.
(Previously amended) The lithium super-battery device of claim 1 wherein said nano graphene platelets comprise curved graphene platelets.
(Previously amended) The lithium super-battery device of claim 1 wherein at least one of the two electrodes further comprises a nano material selected from a carbon nano-tube, carbon nanofiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber, or a combination thereof.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 200 Wh/k g and power density no lower than 45 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 300 Wh/k g and power density no lower than 25 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said device provides an energy density of no less than 500 Wh/k g and power density no less than 15 Kw/kg, all based on the total electrode weight.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 10 pm.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 50 gm.
(Previously amended) The lithium super-battery device of claim 1 wherein said positive electrode has a thickness greater than 100 pm. 6
(Previously amended) The lithium super-battery device of claim -7, wherein the lithium intercalation compound is selected from the following groups of materials, which are capable of absorbing or desorbing lithium ions or atoms: (a) Silicon (Si), germanium (Ge), tin (Sn), lead (Pb), antimony (Sb), bismuth (Bi), zinc (Zn), aluminum (Al), Titanium (Ti), cadmium (Cd), and mixtures thereof; (b) Alloys or intermetallic compounds of Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Ti, or Cd; (c) Oxides, carbides, nitrides, sulfides, phosphides, selenides, tellurides, or antimonides of Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Fe, Ti, Mn, or Cd and mixtures or composites thereof; and (d) Salts or hydroxides of Sn
A lithium supe r-battery device com p rising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium- 4 containing electrol yt e in physical contact with the two electrodes, wherein the positive electrode comprises a plurali t y of chemically f u nctionalized nano grap hene platelets or exfoliated grap hite having a f un ctional arou p that reversibly reacts with a lithium atom or ion wherein said nano ra hene platelets or exfoliated gaphi te co mpri se single-la yer grap hene.
A lithium s u per-battery device comprising a positive electrode, a negative electrode, a porous separator disposed between the two electrodes, and a lithium- containing electrol yt e in physical contact with the two electrodes, wherein the positive electrode comprises a plurali t y of chemically f un ctionalized nano gra phene platelets or exfoliated rap hite having a functional g r oup that reversibly reacts with a lithium atom or ion wherein said nano grap hene platelets or exfoliated rap hite comprise a few-layer graphene platelet formed of 2-10 graphene planes.
Layer stacks claimed or described, ordered top of device to substrate.
lithium super-battery/lithium-exchanging battery
Materials described outside the worked examples.
chemically functionalized nano graphene platelets
exfoliated graphite
porous separator
lithium-containing electrolyte
electrode active material capable of absorbing or desorbing lithium
lithium metal/lithium metal alloy/lithiated compound/lithiated titanium dioxide/lithium titanate/lithium manganate/lithium transition metal oxide
Li₄Ti₅O₁₂
lithium intercalation compound (Si, Ge, Sn, Pb, Sb, Bi, Zn, Al, Ti, Cd or alloys/oxides/carbides/nitrides/sulfides/phosphides/selenides/tellurides/antimonides thereof, or Sn salts/hydroxides)
lithium cobalt oxide/lithium nickel oxide/lithium manganese oxide/lithium vanadium oxide/lithium mixed metal oxide/lithium iron phosphate/lithium vanadium phosphate/lithium manganese phosphate/lithium transition metal phosphate/lithium mixed metal phosphate/lithiated metal sulfide
single-layer graphene
few-layer graphene platelet (2-10 graphene planes)
nano material (carbon nano-tube, carbon nanofiber, activated carbon, carbon black, nano-wire, metal oxide nano-wire or fiber, conductive polymer nano-fiber)
Measurements and analyses referenced in the patent, with their drawing references.
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
FIG.2 (a) A scanning electron microscopic image of curved NGPs; (b) A transmission electron microscopic image of flat NGPs prepared by using a conventional …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
gravimetric energy density (preferred embodiment, f-NGP positive/Li4Ti5O12 negative) | — | chemically functionalized nano graphene plateletsLi₄Ti₅O₁₂ |
gravimetric power density (preferred embodiment, f-NGP positive/Li4Ti5O12 negative) | — | chemically functionalized nano graphene plateletsLi₄Ti₅O₁₂ |
claimed minimum energy density (claim 25) | — | — |
claimed minimum power density (claim 25) | — | — |
claimed minimum energy density (claim 26) | — | — |
claimed minimum power density (claim 26) | — | — |
claimed minimum energy density (claim 27) | — | — |
claimed minimum power density (claim 27) | — | — |
Duration | 15–60 seconds | — |
Duration | 10–120 minutes | — |
Thickness | ≤ 1 nm | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 10 nm | — |
Thickness | ≥ 5 nm | — |
Thickness | ≥ 2 nm | — |
Duration | ≥ 24 hours | — |
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