BUTTON TYPE ALKALINE BATTERY AND PROCESS FOR MANUFACTURING THE SAME

摘要

A button alkaline battery which is improved in self-discharging characteristic by suppressing the production of gas from its negative electrode can. The negative electrode can having a Cu internal surface is formed with a die of which the part which comes into contact with the Cu surface of the can is made of ceramic. It is preferable to form the negative pole can by using such a die that the cemented carbide and steel at the part which comes into contact with the Cu surface is coated with ceramic. While many kinds of ceramic can be used for coating the cemented carbide and steel, zirconium oxide, silicon boride, silicon nitride, or carbon having a diamond structure is especially desirable.