Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Cell with protective layer on electrolyte
Patent
1996-07-01
1998-02-03
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Cell with protective layer on electrolyte
429130, 429145, 429210, 296233, 296234, H01M 218
Patent
active
057142785
ABSTRACT:
The present invention concerns forming a masked area on a porous separator material for use in a battery. Masked areas can be formed on the porous separator material with heat and/or pressure. The use of a masked area allows for easier alignment of the anode and cathode sections, such that edge effects do not occur. Edge effects, which result from the electrode sections having different surface areas, can cause differential current densities at the corners and edges of the electrode sections. This inhomogeneous cycling of the anode and cathode can cause premature cycle fade of the battery. The edge effects can also include dendritic growth of a lithium anode. The mask separator section can be connected to a solid electrolyte and a cathode section to form an assembly. This assembly can be later combined with an anode assembly to form a battery cell.
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Chaney Carol
Hsue James
Kalafut Stephen
Valence Technology Inc.
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