PURPOSE: To prevent leakage of a liquid by using a gelled cathode active mass of mainly an oxyhalide compound which works as an electrolyte as well.
CONSTITUTION: A cathode active mass 11 is gelled by adding a zirconium pyrophosphate (ZrP2O7) as a gelling agent to a liquid-phase thionine chloride as an oxyhalide compound and mixing the resulting mixture. Meanwhile a cathode 12 is obtained by mixing and stirring a material 11 and a ketjenblack as a conductive agent. In a thionyllithium chloride battery prepared by this way, the material 11 is gel and has little fluidity, and thus the material 11 does not leaked out of the battery as a liquid even when the hermetic seal 7 is damaged and the whole of the battery is turned upside down. The material 11 is uniform and it is held in the uniform state without flowing at the time of discharge, and as a result, even the inside of the cathode 12 is effectively used and usage efficiency of the cathode 12 can be heightened.
SHIODA HISASHI
URUSHIBATA HIROAKI
