Enhanced separators for zinc negative electrodes

Details Enhanced separators for zinc negative electrodes Enhanced separators for zinc negative electrodes

2011-03-29

2011-03-29

Yuan, Dah-Wei D (Department: 1727)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer or spacer insulating structure

C429S129000, C429S142000, C429S143000, C429S146000

Reexamination Certificate

active

07914921

ABSTRACT:
The present invention discloses enhanced separators for storage batteries with zinc negative electrodes. These enhanced separators include a separator layer and one or more resistive layers on said separator layer. The dimensions of the one or more resistive layers are less than or equal to that of the separator layer. Portions of the separator layer can also be treated with a PTFE suspension to increase the resistance at those portions. For storage batteries where the resistance along two edges of the separator layer has to be larger then the center, the enhanced separator include said resistive layers where each layer includes two independent parts positioned along the two edges of the separator layer. The edge portions of the separator layer can also be treated with a PTFE suspension. Using these enhanced separators in storage batteries with zinc negative electrodes can increase the capacity and prolong the life of the batteries. These enhanced separators are also simple, easy to manufacture, and low in cost.

REFERENCES:
patent: 1823031 (1931-09-01), Dalen
patent: 3537908 (1970-11-01), Doll et al.
patent: 3539396 (1970-11-01), Wagner
patent: 3970472 (1976-07-01), Steffensen
patent: 4000005 (1976-12-01), McBreen
patent: 4218521 (1980-08-01), Putt et al.
patent: 6330925 (2001-12-01), Ovshinsky et al.

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