EVALUATION OF FOREIGN S-12 SILVER-ZINC CELLS.
ARMY ELECTRONICS COMMAND FORT MONMOUTH N J ELECTRONIC COMPONENTS LAB
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Two foreign S-12 silver-zinc cells used to power a transceiver were evaluated. Low temperature performance was significantly poorer than that of comparable US cells, while room temperature performance was equivalent. Dissection of one S-12 cell showed that it was designed with an excess of silver powder and that it contained a separator wrap which will limit the useful life of the cell to three to four months, particularly for applications in the tropics. Another shortcoming of the S-12 cells is that the zinc negatives are wrapped in cellophane membrane, a design feature which will decrease the zinc capacity at high rates andor low temperatures. To maintain maximum capacity under extreme environmental conditions it is standard practice in the US to wrap the silver positives in cellophane membrane. Author
- Electrochemical Energy Storage