Patent ID: 7429433

Claim:
A method of producing a positive electrode for a non-aqueous electrolyte primary battery, which comprises the steps of: (I) a step of adding an aqueous solution of at least one alkaline earth metal hydroxide selected from the group consisting of an aqueous solution of magnesium hydroxide, an aqueous solution of calcium hydroxide and an aqueous solution of barium hydroxide to manganese dioxide while cooling below 15° C. and then mixing them with stirring to prepare a mixed solution; (II) a step of raising a temperature of the mixed solution to 45-55° C. at a rate of 1-10° C./min to reduce a water content of the mixed solution and further to 65-85° C. at a rate of 10-15° C./min to remove the water content of the mixed solution to thereby form a mixture of manganese dioxide and alkaline earth metal hydroxide; (III) a step of raising a temperature of the mixture to 290-310° C. and holding at this temperature for a given time to convert the alkaline earth metal hydroxide into an alkaline earth metal oxide to thereby prepare powder for a positive electrode dispersing the alkaline earth metal oxide between particles of manganese dioxide; and (IV) a step of shaping the powder for a positive electrode to produce a positive electrode.