Electrode composition and design for high energy density cells

Chemistry: electrical current producing apparatus – product – and – Sealed cell having gas prevention or elimation means – Prevention or elimination means is one of the cell...

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429191, 429192, 429193, 429204, 429218, 429221, 429224, 429233, 429245, H01M 458

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active

053227468

ABSTRACT:
Nonaqueous electrolyte rechargeable cells may contain an excess of negative electrode material to improve the rechargeability. This excess of negative electrode material can form brittle alloys with noncorrosive current collector metals in positive electrodes at low cell voltages. The invention discloses that an excess of current collector material in the positive electrode directly opposite to the negative electrode improves the safety characteristics of the rechargeable cells during overdischarge and multiple voltage reversal abuses.

REFERENCES:
patent: 3174878 (1958-12-01), Peters
patent: 3174879 (1965-03-01), Stanimirovitch
patent: 4622277 (1986-11-01), Bedder et al.
patent: 4925752 (1990-03-01), Fauteux et al.
Levy, S. C. and Crafts, C. C., The Electrochemical Society Fall Meeting Extended Abstract No. 14, Oct. 11-16, 1981, Denver, Colo.

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