Abstract
The high rate discharge of the thermal battery cell is limited by the reduction of the oxidizing molten salts on the nickel current collector. With the addition of to improve the cathodic reaction, this cell can sustain current densities of 100 mA/cm2 at 350°C to give cell voltages in excess of 2V for several minutes. In cells containing added, the source of eventual polarization is the anode rather than the cathode. Based upon the weight of the calcium and electrolyte, cell discharge at 100 mA/cm2 gives a power density of 740 W/kg and an energy density of 120 W‐hr/kg. At a lower rate of discharge (10 mA/cm2), these cells give very stable potentials of about 2.5V for time periods exceeding 60 min. These cells, therefore, show promise for both high and low rate applications of thermal batteries.
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