Preparation of silicon carbon anode materials for lithium ion batteries by fluidized bed.

Silane and ethylene were deposited on the surface of conductive carbon black by fluidized-bed method, and then solid phase sintering was used to prepare the silicon carbon co-coated conductive carbon black anode material for lithium ion batteries with excellent cyclic properties. The process parameters of silane and ethylene co-deposition were optimized by fluidized bed. The inlet ratio, silane concentration, codeposition temperature and solid sintering temperature of silane and ethylene were obtained. The phase, microstructure and electrochemical properties of the samples were characterized. The test results show that when the silane and ethylene feed ratio is 2:1, the codeposition temperature is 500 °C, and the solid phase sintering temperature is 800 °C, the co-coated conductive carbon black has the best performance as the anode material of lithium-ion battery. The charge and discharge efficiency of the first circle is 88.19%, and the specific charge and discharge capacity of the first circle is 2 205.0 mAh/g. After 25 cycles, the specific capacity of charge and discharge is 1010.0 mAh/g. [ABSTRACT FROM AUTHOR]