Electrochemical energy storage devices comprising self-compensating polymers
First Claim
1. An electrochemical energy storage device, comprising:
- a negative electrode comprising a negative electrode redox-active polymer;
a positive electrode comprising a positive electrode redox-active polymer; and
an electrolyte material interposed between the negative electrode and the positive electrode,wherein at least one of the positive and negative redox-active polymers 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 one or more mobile counterions.
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Abstract
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.
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Citations
20 Claims
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1. An electrochemical energy storage device, comprising:
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a negative electrode comprising a negative electrode redox-active polymer; a positive electrode comprising a positive electrode redox-active polymer; and an electrolyte material interposed between the negative electrode and the positive electrode, wherein at least one of the positive and negative redox-active polymers 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 one or more mobile counterions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification