▎ 摘　　要

NOVELTY - Negative electrode material comprises a core-shell structure. The coreshell structure comprises a core material and a shell layer set on the surface of the core material. The shell layer comprises a shell material, the shell material comprises a cation conductor material and an electron-conducting material. The positive ion conductor material is present in the form of a quasicrystalline state. USE - Negative electrode used for a secondary battery of a electric device (all claimed). ADVANTAGE - The presence of cation conductor materials and conductive electronic materials can improve the electronic conductivity and conductivity of the negative electrode material, and the setting of the core-shell structure can prevent the electrolyte from directly contacting the core material, improving the rate performance of the battery and improving the circulation stability of the battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. a secondary battery, which comprises negative electrode pole piece, where the pole negative electrode comprises the negative electrode material; and 2. an electric device, which comprises secondary battery, where the secondary battery is used as the power supply of the electric device.