▎ 摘　　要

NOVELTY - Anode active material comprises a conductive base material and active material distributed on the conductive base material. The active substance has a core-shell structure. The core-shell structure is composed of a core layer material and a shell layer material. The core layer material comprises a phosphate-based sodium salt material. The shell layer material comprises a conductive polymer. The conductive base material comprises a carbon material. USE - The active material is useful in secondary battery technology field. ADVANTAGE - The active material: has improved the conductivity; increases the gram capacity and dynamic performance of the material; reduces the occurrence of side reactions, and has improved cycle performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) an electrochemical device comprising a positive pole piece, a negative pole piece, a separator, and an electrolyte, where the positive pole piece comprises the anode active material; and (2) an electronic device comprising the electrochemical device.