| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery high in safety, having higher rate characteristics than conventional ones, and also capable of suppressing deterioration in charge-discharge cycle characteristics due to use.SOLUTION: A lithium ion battery 20 has a structure in which a positive electrode 3 faces a negative electrode 6 via a solid electrolyte layer 21. The positive electrode 3 is constituted by an aggregate of positive electrode particles 4, each of the positive electrode particles including a granular positive electrode active substance 1 having a surface coated with a mixed conductive layer 2. The negative electrode 6 is constituted by an aggregate of negative electrode particles 7, each of the negative electrode particles including a granular negative electrode active substance 5 having a surface coated with a mixed conductive layer 2. The mixed conductive layer 2 is constituted by a granular solid electrolyte 9 and a granular conduction aid 10. A solid electrolyte layer 21 is constituted by an aggregate of a third granular solid electrolyte 22. Thus, the lithium ion battery 20 can provide a secondary battery high in safety, having higher rate characteristics than conventional ones, and also capable of suppressing deterioration in charge-discharge cycle characteristics due to use.SELECTED DRAWING: Figure 14 |
