▎ 摘　　要

NOVELTY - A positive electrode material comprises a positive electrode active material, and a coating layer covered on the surface of the positive electrode active material. The coating layer comprises 0.01-10 %mass lithium-rich anti-perovskite lithium agent and 0.01-3 %mass conductive agent with respect to the positive electrode active material. USE - Positive electrode material is used for forming active material layer in positive electrode sheet of lithium-ion battery (all claimed). ADVANTAGE - The positive electrode material uses the lithium-rich anti-perovskite compound as the lithium supplementing agent, which is combined with the positive electrode active material to form a coating structure to provide large amount of additional lithium ions, compensate for the irreversible lithium loss of the negative electrode, and increase the reversible capacity of the full battery system. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: preparation of the positive electrode material, which involves (s1) adding conductive agent to an organic solvent, dispersing, adding positive electrode active material and lithium-rich anti-perovskite lithium agent, dispersing to obtain a composite slurry, and (s2) drying the composite slurry at 100-180℃ for 2-30 minutes in a protective atmosphere; a positive electrode sheet, which comprises a positive electrode current collector, and a positive electrode active material layer coated on at least one surface of the positive electrode the current collector. The positive electrode active material layer comprises the positive electrode material; and a lithium-ion battery, which comprises the positive electrode sheet, a negative electrode sheet, and a diaphragm spaced between the positive electrode sheet and the negative electrode sheet.