Overcharge protection for rechargeable lithium polymer electrolyte batteries
- Lawrence Berkeley National Lab., CA (United States). Materials Sciences Div.
Overcharge protection for rechargeable lithium polymer electrolyte cells by addition of redox shuttle additives to the polymer electrolyte was examined. Shuttle onset potentials and effective diffusion coefficients were determined for 12 redox shuttle species in polyethylene oxide-based electrolytes at 85 C. The four most promising additives were tested in Li/PEO-LiN(SO{sub 2}CF{sub 3}){sub 2}/Li{sub 2+x}Mn{sub 4}O{sub 9} cells under normal and severe overcharging conditions. In addition to tricyanobenzene and tetracyanoquinodimethane, two anionic redox shuttle additives, salts of 1,2,4-triazole and imidazole, demonstrated effectiveness in extending cycle life and good compatibility with cell components.
- Sponsoring Organization:
- United States Advanced Battery Consortium (United States)
- OSTI ID:
- 474631
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 12 Vol. 143; ISSN 0013-4651; ISSN JESOAN
- Country of Publication:
- United States
- Language:
- English
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