HIGH CAPACITY MAGNESIUM BATTERIES
Quarterly pregress rept., 1 Sep 1961-30 Nov 1961
RADIO CORP OF AMERICA SOMERVILLE NJ
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An analysis of heat evolved during Mg-cell discharge showed the heat is due to the irreversibility of the Mg anode and to corrosion. The heat must be controlled for efficient operation. An efficient heat sink must be used at high discharge rates to control voltage tolerance. The use of a water sink permits good operation at rates as low as the 7-min rate. A cathode efficiency of 88 was obtained with a HgO reserve cell at an 8-min discharge rate by using a thin plate construction. Capacity based on element wt. and volume was 39 whrlb and 4.5 whrcu in. Delayed-action studies of AZ-21 Mg-MgClO42 MnO2 cells on a tranceiver-type discharge showed this alloy has characteristics similar to AZ-31 alloy. Impedance of AZ-21 Mg-MgClO42-MnO2 A-size cells was slightly lower than comparable AZ-10 alloy cells. Delayed action and impedance measurements of MgAZ-10-MgClO42-MnO2 and CuO cells stored for 1 yr showed no significant difference from initial fresh-cell results. Cell capacities averaged 90.
- Electrochemical Energy Storage