Schemes for the use of conducting polymers as active materials in electrochemical supercapacitors
- Los Alamos National Lab., NM (United States)
- Texas Univ., Richardson, TX (United States). Dept. of Chemistry
The development of a novel conducting polymer based system for use in electrochemical capacitors is described. This system utilizes a new conducting polymer, poly-3-(4-fluorophenyl)-thiophene (PFPT), that can be reversibly n- and p-doped to high charge density. The electrochemical n-dopability of this material can be further improved by cycling in acetonitrile solution that contains a new electrolyte, tetramethylammonium trifluoromethanesulfonate (Me[sub 4]NCF[sub 3]SO[sub 3]). We discuss these improvements in n-dopability in terms of potential electronic and steric influences. We believe that the substituent fluorophenyl group does not communicate with the polythiophene backbone through resonance, and conclude that the ability to n-dope PFPT to high charge density may occur as a result of electron transfer reactions from the conducting polymer backbone into the substituent. This new system for electrochemical capacitors provides the best achievable performance from conducting polymers and generates high energy and power densities that are comparable with noble metal oxide systems, potentially at a fraction of the cost.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6784789
- Report Number(s):
- LA-UR-93-1618; CONF-930571-14; ON: DE93012713
- Resource Relation:
- Conference: 183. Electrochemical Society meeting, Honolulu, HI (United States), 16-21 May 1993
- Country of Publication:
- United States
- Language:
- English
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ELECTROCHEMISTRY
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400400 - Electrochemistry