Patent ID: 8709661

Claim:
A secondary battery, comprising: a positive electrode including a positive electrode active material layer having a positive electrode active material and a positive electrode conductive agent; a negative electrode; and an electrolyte containing an electrolyte salt and a solvent, wherein an operating voltage of the positive electrode active material is equal to or more than 4.5 V on a lithium metal (Li) basis, and the positive electrode conductive agent contains an amorphous carbon material and a crystalline carbon material, a specific surface area of the amorphous carbon material lying between 50 m 2 /g and 100 m 2 /g both inclusive, a content of the amorphous carbon material in the positive electrode active material layer lying between 0.5 mass % and 5 mass % both inclusive, an interplanar spacing for lattice plane (002) of the crystalline carbon material being equal to or more than 0.340 nm when measured by an X-ray diffraction method, a specific surface area of the crystalline carbon material lying between 1 m 2 /g to 5 m 2 /g both inclusive, and a content of the crystalline carbon material in the positive electrode active material layer lying between 0.5 mass % to 5 mass % both inclusive.