Reactivation and reduction of electrochemically inactivated polyaniline by 2,5-dimercapto-1,3,4-thiadiazole
- Tokyo Univ. of Agriculture and Technology (Japan). Dept. of Applied Chemistry
- Matsushita Electric Industrial Co. Ltd., Osaka (Japan). Energy Research Lab.
Dimercaptanes such as 2,5-dimercapto-1,3,4-thiadiazole (DMcT) have been studied as cathode active materials for lithium secondary batteries. Its redox reaction at most electrode materials is slow at room temperature. The authors have reported that the redox processes of DMcT are accelerated in a polyaniline (PAn) matrix. A PAn film which has been electrochemically inactivated by continuous potential cycling in LiClO{sub 4}/propylene carbonate can be reactivated by 2,5-dimercapto-1,3,4-thiadiazole (DMcT) or methanesulfonic acid. PAn reactivated by DMCT is in its reduced form, while that reactivated by methanesulfonic acid is in its oxidized form. Thus, the reversible inactivation is ascribed to a deprotonation of oxidized PAn. Additionally, DMcT can reduce the oxidized PAn. Similar results were obtained for poly(N-methylaniline).
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 64778
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 4 Vol. 142; ISSN JESOAN; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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