Preparation of Fe2O3/Mn3O4/C Composites as High Performances Anode Materials for Lithium-Ion Batteries.

To improve the electrochemical performances of Mn₃O₄, combining heterojunction structure with the carbon fiber is a good method; the heterojunction structure presents good electron conductivity, and carbon fiber can alleviate particle aggregation, thus improving electrochemical performances. Herein, the mixed transition metal oxide Fe₂O₃/Mn₃O₄/C composites with heterojunction structure are designed through carbonization at high temperature after in situ growth on lignocellulose by simple hydrothermal method. The results of phase analysis show that the synthesis of target product is successful. At the same time, the morphology, element distribution and graphitization degree of the material are characterized, respectively. The analysis of morphology verifies the existence of the heterojunction structure, and the results of electrochemical performances show that Fe₂O₃/Mn₃O₄/C anode material has excellent performance. The specific capacity of Fe₂O₃/Mn₃O₄/1C can be maintained at 917.53 mAh g⁻¹ at 100 mA g⁻¹, and the capacity retention ratio can be maintained at 137.9% after 200 cycles. [ABSTRACT FROM AUTHOR]