▎ 摘　　要

NOVELTY - A positive electrode active material comprises a conductive base material (1) and an active substance (2) distributed on the conductive base material. The active substance has a core-shell structure, and the core-shell structure is composed of a core layer material and a shell layer material. The conductive base material includes carbon material, and the mass ratio of the conductive base material in the positive electrode active material is 1-10%. The core layer material includes a phosphate-based sodium salt material, the shell layer material includes a metal oxide, and the mass ratio of the shell layer material in the positive electrode active material is 1-10%. The resistivity of the positive electrode active material under a pressure of 20 MPa is 47-92 Ω.cm, and the average particle size of the positive electrode active material is 5-20 μm. USE - Positive electrode active material used for electrochemical device for electronic equipment (all claimed). ADVANTAGE - The positive electrode active material, electrochemical device and electronic equipment can effectively improve conductivity of the positive electrode active material, improve gram capacity and kinetic performance of the material, reduce occurrence of side reactions, and improve cycle performance of the positive electrode active material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an electrochemical device, which includes a positive electrode pole piece, a negative electrode pole piece, an isolating film and an electrolyte solution, where the positive electrode pole piece comprises the positive electrode active material. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the positive electrode active material. 1Conductive base material 2Active substance