| 摘要 |
A secondary battery according to the present invention has a current collector and a positive electrode mixture layer that coats the current collector. The positive electrode mixture layer includes a positive electrode active material, an electrically conductive material, and a binder, and the positive electrode active material is constituted by hollow-structure secondary particles formed by the aggregation of a plurality of primary particles of a lithium transition metal oxide and has a through hole penetrating from outside to a hollow portion. In addition, a particle porosity A1 of the positive electrode active material satisfies 2.0(%)@A1@70(%). Furthermore, a DBP absorption A2 of the positive electrode active material satisfies 23 (mL/100 g)@A2. Moreover, the tap density A3 of the positive electrode active material satisfies 1.0 (g/mL)@A3@1.9 (g/mL). |
