▎ 摘　　要

NOVELTY - A lithium battery comprises a positive electrode sheet coated with a positive electrode slurry on the surface, where the positive electrode slurry includes a positive electrode active material. The positive active material includes a medium nickel ternary material and lithium manganese iron phosphate in a mass ratio of (1-5):(5-10). USE - Lithium battery is useful in a power device (claimed). ADVANTAGE - The battery can effectively improve the acupuncture and hot box performance of the ternary battery. Since the kinetic performance of the nano-scale lithium manganese iron phosphate itself is relatively poor, the micron-scale ternary particles can be coated during the homogenization process. At the same time, the poor conductivity of lithium manganese iron phosphate itself also reduces the risk of internal short circuit after needling. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a power device.