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ELECTROCHEMICAL ENERGY STORAGE DEVICES COMPRISING SELF-COMPENSATING POLYMERS

United States Patent Application

20150333331
A1
View the Complete Application at the US Patent & Trademark Office
The disclosed technology relates generally to devices comprising conductive polymers and more particularly to electrochemical devices comprising self-compensating conductive polymers. In one aspect, electrochemical energy storage device comprises a negative electrode comprising an active material including a redox-active polymer. The device additionally comprises a positive electrode comprising an active material including a redox-active polymer. The device further comprises an electrolyte material interposed between the negative electrode and positive electrode and configured to conduct mobile counterions therethrough between the negative electrode and positive electrode. At least one of the negative electrode redox-active polymer and the positive electrode redox-active polymer comprises a zwitterionic polymer unit configured to reversibly switch between a zwitterionic state in which the zwitterionic polymer unit has first and second charge centers having opposite charge states that compensate each other, and a non-zwitterionic state in which the zwitterionic polymer unit has one of the first and second charge centers whose charge state is compensated by mobile counterions.
Johnson, Paul (Phoenix, AZ), Bautista-Martinez, Jose Antonio (Mesa, AZ), Friesen, Cody (Fort McDowell, AZ), Switzer, Elise (Napa, CA)
14/ 710,509
May 12, 2015
STATEMENT REGARDING FEDERALLY SPONSORED R&D [0002] This invention was made with government support under DE-AR0000459 awarded by the Department of Energy. The government has certain rights in the invention.