Cylindrical lithium primary battery using a Li-Al alloy negative electrodeand a MnO2 positive electrode with high specific surface area

The MnOz/Li cylindrical cell has been developed using a lithium-aluminum al loy negative electrode and an electrolytic manganese dioxide positive elect rode with high specific surface area. The cell capacity at -20 degrees C wi th the lithium-aluminum negative electrode has retained 90% after stored fo r 40 days at 60 degrees C,The high retention was explained by no formation of LiOH on the lithium-aluminum alloy surface in storage, though the format ion of LiOH was observed in the pure lithium negative electrode. The cell v oltage on pulse discharge at -20 degrees C was improved by using the electr olytic manganese dioxide with high specific surface area, and the cell capa city at -20 degrees C increased about 38% compared with the conventional el ectrolytic manganese dioxide.