GRAPHENE POWDER, PRODUCTION METHOD THEREOF, AND ELECTROCHEMICAL DEVICE COMPRISING SAME

Patent

Atlas literature

Patent

US 9,413,007

GRAPHENE POWDER, PRODUCTION METHOD THEREOF, AND ELECTROCHEMICAL DEVICE COMPRISING SAME

SUN, P, WU, Zhenqi, LIU, Gangqiao, TAMAKI, Eiichi et al.

TORAY FIBERS & TEXTILES RESEARCH LABORATORIES (CHINA) CO., LTD.·14 June 2012·US

Claims

Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.

6 independent · 15 dependent

1
Independentgraphene powder
A graphene powder having an elemental ratio of oxygen atoms to carbon atoms of not less than 0.07 and not more than 0.13 and an elemental ratio of nitrogen SVG 13992937.03-17-2016.ILWCFYAKRXEAPX4.CLM.1.svg 1.72 6.59 Black and white
1. 3
  Dependent← claim 1graphene powder
  The graphene powder according to claim 1, wherein a ratio of I 2D peak inten s ity to I G peak intensity measured by Raman spectroscopy which is measured at an excitation wavelength of 514.5 nm using argon ion laser as excitation laser is not less than 0.1 and not more than 0.2.
2. 4
  Dependent← claim 1graphene powder
  A graphene powder having an elemental ratio of oxygen atoms to carbon atoms of not less than 0.07 and not more than 0.13 and an elemental ratio of nitrogen atons to Erbon r omrsof not mor e than.01 The graphene p owder according to claim 1, wherein a ratio of the peak area at around 1750 cm-l derived from a carbonyl group to the peak area at around 1560 cm⁻¹ derived from a carbon-carbon double bond measured by I R spectroscopy which is carried out by ATR method is not less than 0.1 and not more than 0.5.
3. 8
  Dependent← claim 1graphene powderelectrochemical device
  An electrochemical device comprising the graphene powder according to claim 1.
4. 10
  Dependent← claim 1graphene powder
  The graphene powder according to claim 1, wherein the graphene powder comprises ﬂakes of the graphene powder.
5
Independentgraphene powdergraphene oxidedithionous acid salt
A method for producing a graphene powder comprising reducing graphene oxide using a reducing agent, wherein a dithionous acid salt is used as the reducing agent wherein the elemental ratio of oxygen atoms to carbon atoms in graphene oxide is -2- U.S. Patent Application No.: 13/992,937 Attorney Reference No.: 085133-0422525 not more than 0.5 and no peak peculiar to graphite is detected in an x-ray diﬀraction spectrum of the graphene oxide.
1. 6
  Dependent← claim 5graphene powderNa₂S₂O₄K₂S₂O₄
  The method for producing a graphene powder according to claim 5, wherein the dithionous acid salt is sodium dithionite or potassium dithionite.
7
Independent
. canceled
13
Independentgraphene powder
A graphene powder comprising oxygen- and carbon and nitrogen, wherein the graphene powder comprises ﬂakes of the graphene powder and wherein the elemental ratio of oxygen atons to carbon atoms in graphene oxide is not more than 0.5 and no peak peculiar to graphite is detected in an x-ray diﬀraction specdrum of the graphene oxidt whrein di " graphene powder has no peak peculiar for graphne oxide in 12, 5 to 13. 00 b y x ra y diﬀractometry, wherein a thickne s of the fMake is no more than 100 nn.
1. 15
  Dependent← claim 13graphene powder
  The graphene powder according to claim 13, wherein a thickness of the ﬂakes is no more than 50 nm.
2. 16
  Dependent← claim 13graphene powderelectrochemical device
  An electrochemical device comprising the graphene powder according to claim 13.
3. 18
  Dependent← claim 13graphene powderelectrochemical device
  An electrochemical device comprising the graphene powder according to claim 13.
4. 20
  Dependent← claim 13graphene powderlithium ion secondary battery
  An electrochemical device comprising the graphene powder according to claim 13, wherein the electrochemical device comprises a lithium ion secondary battery.
5. 22
  Dependent← claim 13graphene powder
  The graphene powder of claim 13, wherein a thickness of the ﬂakes is no more than 100 nm. -4-
14
Independent
-3- U.S. Patent Application No.: 13/992,937 Attorney Reference No.: 085133-0422525 canceled
21
Independentgraphene powdergraphene oxidedithionous acid salt
A graphene powder having an elemental ratio of oxygen atoms to carbon atoms of not less than 0.07 and not more than 0.13 and an elemental ratio of nitrogen atoms to carbon atoms of not more than 0.01, wherein the graphene powder is prepared by a method for producing the graphene powder comprising reducing graphene oxide using a reducing agent, wherein a dithionous acid salt is used as the reducing agent wherein the elemental ratio of oxygen atoms to carbon atoms in graphene oxide is not more than 0.5 and no peak peculiar to graphite is detected in an x-ray diﬀraction spectrum of the graphene oxide.

Device structures

Layer stacks claimed or described, ordered top of device to substrate.

electrochemical device

graphene powderactive material or conductive additive

lithium ion secondary battery

graphene powderactive material or conductive additive

Materials

Materials described outside the worked examples.

graphene powder

Primary Material

graphene oxide

Precursor

Process steps

Additional fabrication and treatment steps described in the patent.

Chemical Reduction

Step 1

Process details

reducing agent:dithionous acid salt

graphene oxide xrd:no peak peculiar to graphite

temperature c lower bound:0.5

graphene oxide O to C ratio:not more than 0.5

Materials:

Reported properties

Performance values and ranges asserted in the specification or claims.

Property	Value	Material
Elemental Ratio O To C	0.07–0.13 atomic ratio	graphene powder
Elemental Ratio N To C	≤ 0.01 atomic ratio

Tables

Table 1
Graphene conductivity Properties of graphene(S/) O/C N/C ID/IG T₂D/I G (C= 0/
The results are collectively shown in Table 1.
p. 11
Table 2
Yield Discharge value capacity (Pa)
The results are collectively shown in Table 2.
p. 16

Why these are connected

Related documents with shared materials, methods, properties, or citations.

GRAPHENE POWDER, PRODUCTION METHOD THEREOF, AND ELECTROCHEMICAL DEVICE COMPRISING SAME | Matter42 Literature