Prevention of lithium deposition in nonaqueous electrolyte...

Details Prevention of lithium deposition in nonaqueous electrolyte... Prevention of lithium deposition in nonaqueous electrolyte...

2004-12-09

2008-10-07

Kalafut, Stephen J. (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Having pulse feature

C429S050000, C429S161000, C429S219000, C429S231500

Reexamination Certificate

active

07432001

ABSTRACT:
The prevention of lithium clusters from bridging between the negative and positive portions of a cell during discharge is described. This is done by limiting the amount of electrolyte in the cell, thereby eliminating excess electrolyte pooling above the cell stack. It is in this excess electrolyte that a relatively higher Li+ion concentration can occur, creating an anodically polarized region resulting in the reduction of lithium ions on the negative and positive surfaces as the concentration gradient is relaxed. Typically, a lithium ion concentration gradient sufficient to cause lithium cluster formation is induced by the high rate, intermittent discharge of a lithium/silver vanadium oxide (Li/SVO) cell.

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