| 摘要 |
PURPOSE:To obtain a manganese dry battery excellent in heavy load discharge characteristics as compared with one wherein electrolytic manganese deoxide powder is used as a positive electrode active material by using a mixture of chemically synthesized manganese deoxide powder mainly composed of gamma type crystals and electrolytic manganese deoxide powder as the positive electrode active material. CONSTITUTION:A positive electrode active material is used as a positive electrode combining agent 3 for a manganese dry battery wherein said material is composed of a mixture of chemically synthesized manganese deoxide powder mainly consisting of gamma type crystals formed by the acidification of a manganese oxide which is obtained through roasting manganese sulphate, and of electrolytic manganese deoxide powder. It is desirable that the aforesaid chemically synthesized manganese deoxide powder shall be less than 20mum in size. And it is also desirable that the proportion rate of the gamma type crystals out of said chemically synthesized manganese deoxide shall be equal to or more than 70%. When said positive electrode combining agent is used, a manganese dry battery excellent in heavy load discharge characteristics can thereby be obtained as compared with one wherein electrolytic manganese deoxide is used as the positive electrode active material. |
