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.

Automated summary

To improve the performance of Mn3O4, a heterojunction structure with carbon fiber was introduced. Fe2O3/Mn3O4/C composites were designed using a simple hydrothermal method followed by high temperature carbonization. The synthesis of the target product was successful, as confirmed by phase analysis. The morphology, element distribution, and graphitization degree of the material were characterized. The existence of the heterojunction structure was verified through morphology analysis. The electrochemical performance results showed excellent performance of Fe2O3/Mn3O4/C anode material, with a specific capacity of 917.53 mAh g(-1) at 100 mA g(-1), and a capacity retention ratio of 137.9% after 200 cycles.