| 摘要 |
Provided is a secondary battery capable of improving charge-discharge characteristics. A positive electrode active material layer 21B of a positive electrode 21 has a positive electrode active material and a positive electrode conductive agent. The positive electrode active material is a high-voltage operating positive electrode material whose operating voltage is equal to or more than 4.5 V on a lithium metal basis. The positive electrode conductive agent contains an amorphous carbon material and a crystalline carbon material, and an interplanar spacing for lattice plane (002), a specific surface area, and a content in the positive electrode active material layer 21 B, thereof are so normalized as to be in predetermined ranges, respectively. The positive electrode active material layer 21B becomes less likely to expand and contract, and thus becomes less likely to be detached from the positive electrode current collector 21A. A conductivity of the positive electrode active material layer 21B becomes high, and a decomposing reaction of an electrolyte is suppressed. |
