▎ 摘　　要

NOVELTY - Preparing covalent organic framework/graphene composite material modified by silane coupling agent comprises performing first solvothermal reaction for first anchoring agent and graphite oxide in the presence of first solvent to obtain functionalized oxidized graphite, performing second solvothermal reaction on the functionalized oxidized graphite with a silane coupling agent and second anchoring agent in the presence of second solvent and first inert atmosphere to obtain a precursor material, where first anchoring agent and second anchoring agent are independently symmetrical diboronic acid compound; and subjecting the precursor material and the inorganic salt to a carbonization reaction under second inert atmosphere to obtain the covalent organic framework/graphene composite material modified by the silane coupling agent, and the melting point of the inorganic salt is higher than 200℃ and less than 500℃. USE - The preparation method for covalent organic framework/graphene composite material modified by silane coupling agent is useful for electrode of lithium ion battery or sodium ion battery (all claimed). ADVANTAGE - The method has high specific capacity, good multiplying power performance and circulating performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for covalent organic framework/graphene composite material modified by silane coupling agent prepared by above method.