POSITIVE ELECTRODE PLATE, METHOD FOR PREPARING THE SAME AND LITHIUM-ION SECONDARY BATTERY

The present application discloses a positive electrode plate, a preparation method thereof, and a lithium-ion secondary battery, wherein the positive electrode plate includes a positive electrode current collector and a positive electrode film disposed on at least one surface of the positive electrode current collector, wherein the positive electrode film includes a positive active material which is a lithium manganese-based positive active material; and wherein the volume resistivity ρ of the positive electrode plate, the powder volume resistivity p of the positive active material under a pressure of 20MPa and the mass percentage a of the positive active material in the positive electrode film satisfy ρ/ρ≤ 3. The positive electrode plate provided in the present application enables the lithium-ion secondary battery to simultaneously have higher safety performance, rate performance and cycle performance.