Electrochemical performance of lithium/sulfur cells with three different polymer electrolytes
Exploratory investigations of lithium/polymer/sulfur cells were carried out, with emphasis on reducing the operating temperature from 100 C to room temperature. The charge and discharge characteristics of lithium/polymer electrolyte/sulfur cells are presented. Three different electrolytes were studied, and cells were operated at temperatures ranging from ambient to about 100 C. The effects of the sulfur electrode composition and cycling regimen on both the potential profiles and the capacity fade rate were investigated. Cells prepared with poly(ethylene oxide) and operated at 90-100 C could be discharged to nearly the full theoretical 1672 mAh/g active material but with a high rate of capacity fade. Reducing the depth of discharge to 30 percent or less increased the cell lifetime. Room-temperature cells with poly(ethylene glycol) dimethyl ether could be discharged to about 45 percent utilization of the sulfur and showed a much lower capacity fade rate after the second cycle. Several possible explanations for the high rate of capacity fade and the effect of the depth of discharge on this rate are presented.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Energy Efficiency and Renewable Energy. Office of Transportation Technologies. Office of Advanced Automotive Technologies (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 832744
- Report Number(s):
- LBNL-45999; JPSODZ; R&D Project: 474101; TRN: US200429%%1545
- Journal Information:
- Journal of Power Sources, Vol. 89, Issue 2; Other Information: Journal Publication Date: 08/2000; PBD: 1 Feb 2000; ISSN 0378-7753
- Country of Publication:
- United States
- Language:
- English
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