| 摘要 |
PROBLEM TO BE SOLVED: To retard interface reaction between a solid electrolyte and electrode active materials by interposing solid electrolyte powder between a positive electrode active material body made by mixing positive electrode active material powder and solid electrolyte powder and a negative electrode active material body made by mixing negative electrode active material powder and solid electrolyte powder, heating with microwaves, and then sealing them in a battery can. SOLUTION: A positive electrode active material body 3 of a coin type lithium battery is prepared by mixing positive electrode active material powder and solid electrolyte powder and heating with microwaves, and a negative electrode active material body 6 is prepared by mixing negative electrode active material powder and solid electrolyte powder and heating with microwaves. The negative electrode active material body 6 is a mixture of an oxide having charging-discharging potential lower than that of a positive electrode active material in the positive electrode active material body 3 and the solid electrolyte powder. A solid electrolyte 5 is prepared by also heating with microwaves. As an oxide used in the positive electrode active material body 3 and the negative electrode active material body 6, lithium manganese composite oxide, for example, is used. |
