▎ 摘　　要

NOVELTY - Preparing negative electrode material involves dispersing silicon-based material into graphene oxide solution, preparing silicon-oxygen material precursor by solvothermal process, calcining the obtained silicon-oxygen material precursor to obtain a graphene silicon-oxygen composite material, granulating the obtained graphene silicon-oxygen composite material to obtain a composite material, depositing an amorphous carbon layer on the surface of the obtained composite material to complete the preparation of the negative electrode material. USE - Method for preparing negative electrode material used in secondary battery (claimed). ADVANTAGE - The method has reserves space for the expansion of the silicon negative electrode by designing the structure of the silicon negative electrode material, so as to effectively alleviating the volume expansion problem of the current silicon oxide negative electrode material in the alloying and dealloying process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a secondary battery, which comprises: a positive electrode sheet, negative electrode sheet, and separator spaced between the positive electrode sheet and the negative electrode sheet, where the negative electrode sheet is the negative electrode material.