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Electrochemical supercapacitors

Patent ·
OSTI ID:870478
 [1];  [2];  [1]
  1. Los Alamos, NM
  2. Dallas, TX
+ Show Author Affiliations

A new class of electrochemical capacitors provides in its charged state a positive electrode including an active material of a p-doped material and a negative electrode including an active material of an n-doped conducting polymer, where the p-doped and n-doped materials are separated by an electrolyte. In a preferred embodiment, the positive and negative electrode active materials are selected from conducting polymers consisting of polythiophene, polymers having an aryl group attached in the 3-position, polymers having aryl and alkyl groups independently attached in the 3- and 4-positions, and polymers synthesized from bridged dimers having polythiophene as the backbone. A preferred electrolyte is a tetraalykyl ammonium salt, such as tetramethylammonium trifluoromethane sulphonate (TMATFMS), that provides small ions that are mobile through the active material, is soluble in acetonitrile, and can be used in a variety of capacitor configurations.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM
DOE Contract Number:
W-7405-ENG-36
Assignee:
Regents of University of California, Office of Technology (Alameda, CA)
Patent Number(s):
US 5527640
Application Number:
08/306214
OSTI ID:
870478
Country of Publication:
United States
Language:
English

References (6)

(CH)x/(CH)x battery with unsymmetrical tetraalkyl ammonium salt journal February 1987
Organic batteries: reversible n- and p- type electrochemical doping of polyacetylene, (CH) x journal January 1981
Tetraalkylammonium trifluoromethanesulfonates as supporting electrolytes journal December 1972
Polypyrrole Supercapacitors book January 1989
Comparison of various tetraalkylammonium salts as supporting electrolytes in organic electrochemical reactions journal August 1971
Transition from “Supercapacitor” to “Battery” Behavior in Electrochemical Energy Storage journal January 1991

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3-
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acetonitrile
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active material
active materials
alkyl
ammonium
ammonium salt
aryl
attached
backbone
bridged
capacitor
capacitors
charged
conducting
conducting polymer
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consisting
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electrochemical
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n-doped
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p-doped
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provides
salt
selected
separated
soluble
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supercapacitors
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tetraalykyl
tetramethylammonium
tmatfms
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