Experimental Study on High Performance Lithium Battery Anode Material Fe3O4@C

Compared with commercial graphite anodes, Fe3O4 has the advantages of high capacity, abundant reserves, low cost, and non-toxicity. It is a strong competitor for the next generation of power battery anode materials. In order to solve the problems of poor electrical conductivity and large volume changes of Fe3O4, this paper uses acetone and Fe2O3 nanocubes as precursors to prepare Fe3O4@C composites by one-step synthesis and etch them with HCl to prepare Fe3O4@C composite material of core-shell structures. The nanocube structured negative electrode material exhibits excellent electrochemical performance, and provides theoretical support for the development of the next generation high-performance lithium battery negative electrode material.The nanocube structure of the anode material showed good electrochemical performance.By changing the etching time, the space between the Fe3O4 core and the carbon shell can be easily adjusted. In the etching process, Fe3O4 cores with different size cavities can also be obtained. When the current density is 100 mAg-1, the specific discharge capacity can reach 874 mAhg-1. The good high capacity and high rate of new energy of Fe3O4@C is attributed to the design of nanocube structure.