Abstract
The unique “necklace-like” structure of Fe3O4/MWCNT composites endows it with excellent electrochemical performance. The “necklace-like” nanostructure of Fe3O4/MWCNT designed to overcome the limits of Fe3O4’s low conductivity. Lithium ions pass through the tubular tunnel of MWCNT to reach the center of Fe3O4 microspheres, and thus a redox reaction that diffuses from the inside to the outside occurs. The microstructure of nano Fe3O4/MWCNT composites was designed by adjusting the addition amount of Fe3+, solvothermal time, addition amount of precipitant and electrochemical redox reaction. Realize the control of Fe3O4 microsphere size from 100 nm to 400 nm, the optimal discharge specific capacity of the composite material is as high as 1080 mAh/g, and it has good cycle reversibility. The adjustment of experimental parameters is used to realize the controllable preparation of the size, density, and microstructure composition of the composite material, and the Fe3O4/MWCNT microstructure adjustment is achieved by means of the redox reaction and ion implantation in the electrochemical reaction process.
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