Rechargeable metal-air battery

Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation

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Details

429229, H01M 1206

Patent

active

049578260

ABSTRACT:
A zinc anode plate is completely wrapped in a cloth anode separator containing liquid electrolyte. A hydro-gel material packed in an inert mesh separator is sandwiched between the wrapped anode and an air cathode which is in the form of a carbon membrane. The gel material is sufficiently permeable to oxygen to allow oxygen flow therethrough during charging and discharging cycles of the battery, and provides chemical reactive communication between the air cathode and the electrolyte in the anode separator without allowing electrolyte to pass therethrough. The permeability of the gel material is selected such that during charging of the battery, oxygen generated by the anode exerts sufficient pressure at the interface of the anode separator and gel material to cause electrolyte to be recirculated through the edges of the cloth anode separator to the opposite layer thereof, thereby preventing depletion of electrolyte to the anode.

REFERENCES:
patent: 3518123 (1970-06-01), Katsoulis et al.
patent: 3759748 (1973-09-01), Palmer
patent: 3960600 (1976-06-01), Chodosh
patent: 4084047 (1978-04-01), Himy et al.
patent: 4118551 (1978-10-01), Chireau et al.
patent: 4585710 (1986-04-01), McEvoy

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