Characterization of high-voltage cathodes in CsBr-LiBr-KBr eutectic electrolyte
The transition-metal oxides LiMn{sub 2}O{sub 4}, MnO{sub 2}, CrO{sub 2}, and LiCoO{sub 2} were evaluated for possible use as high-voltage cathodes for potential geothermal power applications. These were coupled with Li(Si) anodes and a low-melting CsBr-LiBr-KBr eutectic electrolyte that melts at 228.5 C. Single-cell tests at 250 C and 300 C at 15.8 and 31.6 mA/cm{sup 2} showed that MnO{sub 2} performed the best overall and had the lowest polarization. A 5-cell battery test using LiMn{sub 2}O{sub 4} cathodes was only modestly successful due to possible parasitic chemical reactions between the cathode and electrolyte at the much higher temperature (500 C) during discharge. The overall energy densities for these cathode were still less than for FeS{sub 2}.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 754336
- Report Number(s):
- SAND99-2906C; 0000033829-000; 0000033829-000; TRN: AH200016%%226
- Resource Relation:
- Conference: 38th Power Sources Conference, Chery Hill, NJ (US), 06/12/2000--06/15/2000; Other Information: PBD: 20 Apr 2000
- Country of Publication:
- United States
- Language:
- English
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