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Title: Flexible asymmetric electrochemical cells using nano graphene platelet as an electrode material

Patent ·
OSTI ID:1531986
; ; ; ;

A flexible, asymmetric electrochemical cell comprising: (A) A sheet of graphene paper as first electrode comprising nano graphene platelets having a platelet thickness less than 1 nm, wherein the first electrode has electrolyte-accessible pores; (B) A thin-film or paper-like first separator and electrolyte; and (C) A thin-film or paper-like second electrode which is different in composition than the first electrode; wherein the separator is sandwiched between the first and second electrode to form a flexible laminate configuration. The asymmetric supercapacitor cells with different NGP-based electrodes exhibit an exceptionally high capacitance, specific energy, and stable and long cycle life.

Research Organization:
Nanotek Instruments, Inc., Dayton, OH (United States)
Sponsoring Organization:
USDOE
Assignee:
Nanotek Instruments, Inc. (Dayton, OH)
Patent Number(s):
9,640,334
Application Number:
12/657,579
OSTI ID:
1531986
Resource Relation:
Patent File Date: 2010-01-25
Country of Publication:
United States
Language:
English

References (10)

Method for producing ultra-thin nano-scaled graphene platelets patent-application January 2009
Asymmetric electrochemical capacitor and method of making patent April 2001
Supercapacitor using carbon nanosheets as electrode patent-application September 2008
Asymmetric Electrochemical Supercapacitor and Method of Manufacture Thereof patent-application November 2009
Modified carbon products and their applications patent-application November 2005
Method for the deposition of an electrocatalyst layer patent-application July 2003
Method of producing graphite-carbon composite electrodes for supercapacitors patent-application March 2009
Highly conductive nano-scaled graphene plate nanocomposites and products patent-application July 2007
Preparation of Graphitic Acid patent July 1957
Nano-scaled graphene plate nanocomposites for supercapacitor electrodes patent November 2009

Cited By (2)

Flexible asymmetric electrochemical cells using nano graphene platelet as an electrode material patent May 2018
Vehicle propulsion system having an energy storage system and optimized method of controlling operation thereof patent September 2018

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36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY