Chemistry: electrical current producing apparatus – product – and – Fluid active material or two-fluid electrolyte combination...
Patent
1998-09-03
2000-01-25
Bell, Bruce F.
Chemistry: electrical current producing apparatus, product, and
Fluid active material or two-fluid electrolyte combination...
429105, 4292319, 42923195, 429303, 429314, 429319, H01M 436
Patent
active
060176512
ABSTRACT:
Batteries including a lithium electrode and a sulfur counter electrode that demonstrate improved cycling efficiencies are described. In one embodiment, an electrochemical cell having a lithium electrode and a sulfur electrode including at least one of elemental sulfur, lithium sulfide, and a lithium polysulfide is provided. The lithium electrode includes a surface coating that is effective to increase the cycling efficiency of said electrochemical cell. In a more particular embodiment, the lithium electrode is in an electrolyte solution, and, more particularly, an electrolyte solution including either elemental sulfur, a sulfide, or a polysulfide. In another embodiment, the coating is formed after the lithium electrode is contacted with the electrolyte. In a more particular embodiment, the coating is formed by a reaction between the lithium metal of the lithium electrode and a chemical species present in the electrolyte.
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Chu May-Ying
Nimon Yevgeniy S.
Visco Steven J.
Bell Bruce F.
PolyPlus Battery Company, Inc.
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