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Title: Graphene nanocomposites for electrochemical cell electrodes

A composite composition for electrochemical cell electrode applications, the composition comprising multiple solid particles, wherein (a) a solid particle is composed of graphene platelets dispersed in or bonded by a first matrix or binder material, wherein the graphene platelets are not obtained from graphitization of the first binder or matrix material; (b) the graphene platelets have a length or width in the range of 10 nm to 10 .mu.m; (c) the multiple solid particles are bonded by a second binder material; and (d) the first or second binder material is selected from a polymer, polymeric carbon, amorphous carbon, metal, glass, ceramic, oxide, organic material, or a combination thereof. For a lithium ion battery anode application, the first binder or matrix material is preferably amorphous carbon or polymeric carbon. Such a composite composition provides a high anode capacity and good cycling response. For a supercapacitor electrode application, the solid particles preferably have meso-scale pores therein to accommodate electrolyte.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1226231
Assignee:
Nanotek Instruments, Inc. DOESC
Patent Number(s):
9,190,667
Application Number:
12/220,651
Resource Relation:
Patent File Date: 2008 Jul 28
Research Org:
Nanotek Instruments, Inc, Dayton, OH (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION

Other works cited in this record:

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High reversible capacity carbon-lithium negative electrode in polymer electrolyte
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Modified carbons for improved anodes in lithium ion cells
journal, July 2001

Effects of catalytic oxidation on the electrochemical performance of common natural graphite as an anode material for lithium ion batteries
journal, April 2000

Mild preparation of anode materials by a salt-free green method
journal, June 2002

Carbon anode materials for lithium ion batteries
journal, March 2003

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