Preparation method and application of cobalt-based metal organic framework Co-MOF material

Abstract

The invention provides a preparation method and application of a cobalt-based metal organic framework Co-MOF material. The preparation method of the Co-MOF material comprises the following steps of: respectively dissolving ligands 4'-phenyl-[2, 2': 6', 2''-terpyridyl]-4, 4''-dicarboxylic acid and cobalt nitrate hexahydrate in water at normal temperature; adding 0.5 mL of nitric acid, 1-3mL of dimethyl sulfoxide and 3-6mL of N, N-dimethylformamide into the mixed aqueous solution for mixing, and putting the mixed solution into a reaction kettle lining and carrying out ultrasonic treatment for 15-45 minutes; putting the reaction kettle into a blast drying oven, and carrying out heating reaction at the temperature of 120-140 DEG C; and cooling to room temperature, and filtering reaction liquidin the reaction kettle to obtain purple red strip-shaped Co-MOF crystals. The Co-MOF material disclosed by the invention has the characteristics of simple synthesis method, high yield and purity andclear composition and structure, and the Co-MOF material is directly applied to the field of lithium battery electrode materials for the first time, has good electrochemical performance, and has highdischarge capacity and coulombic efficiency.

Description

technical field [0001] The invention belongs to the technical field of preparation of battery electrode materials, and in particular relates to a preparation method and application of a cobalt-based metal organic framework Co-MOF material. Background technique [0002] Lithium-ion batteries (LIBs) have become important energy storage devices due to their environmental friendliness, high energy density, and low cost, and are widely used in various fields. In recent years, the development of lithium-ion batteries has gradually slowed down, which has seriously hindered the promotion of electric vehicles and the progress of other energy industries. Commonly used lithium battery anode materials include carbon materials such as graphite and amorphous, and non-carbon materials such as tin-based and silicon-based materials. However, although carbon materials have good electrical conductivity, their rate performance is poor, and non-carbon materials have disadvantages such as low sp...

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Problems solved by technology

[0004] However, the poor stability of MOFs hinders their further development and application.

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