Title: Graphene nanocomposites for electrochemical cell electrodes

Abstract

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:

Zhamu, Aruna; Jang, Bor Z.; Shi, Jinjun

Issue Date:

2015-11-19

Research Org.:

Nanotek Instruments, Inc, Dayton, OH (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1226231

Patent Number(s):

9190667

Application Number:

12/220,651

Assignee:

Nanotek Instruments, Inc.

Patent Classifications (CPCs):

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01G - CAPACITORS

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01G - CAPACITORS

H01G11/22 - Electrodes
H01G11/36 - Nanostructures, e.g. nanofibres, nanotubes or fullerenes
H01G11/38 - Carbon pastes or blends
H01G11/42 - Powders or particles, e.g. composition thereof

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

H01M10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes
H01M2004/021 - {Physical characteristics, e.g. porosity, surface area}
H01M2004/022 - {Electrodes made of one single microscopic fiber}
H01M4/133 - Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
H01M4/1393 - of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
H01M4/362 - {Composites}
H01M4/587 - for inserting or intercalating light metals
H01M4/621 - {Binders}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/10 - Energy storage
Y02E60/13 - Ultracapacitors, supercapacitors, double-layer capacitors

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Resource Type:

Patent

Resource Relation:

Patent File Date: 2008 Jul 28

Country of Publication:

United States

Language:

English

Subject:

30 DIRECT ENERGY CONVERSION