Rice-shaped Fe2O3@C@Mn3O4 with three-layer core-shell structure as a high-performance anode for lithium-ion batteries

I-n order to solve the problem of poor cycling performance of Fe2O3 for lithium-ion batteries (LIBs) due to its poor electronic conductivity and large volume expansion during charge/discharge cycles, we designed and synthesized Fe2O3@C@Mn3O4 with three-layer core-shell structure, which consists of Fe2O3, mesoporous carbon, and Mn3O4. The unique structure of the Fe2O3@C@Mn3O4 effectively alleviates volume expansion, improves electronic conductivity, and then improves cycle stability. When the Fe2O3@C@Mn3O4 is used as an anode for LIBs, at a current density of 200mA g(-1), the discharge capacity is 1062 mAh g(-1) after 100 cycles. When the current density is as high as 1000 mA g(-1), the discharge capacity still reaches 853 mAh g(-1) after 450 cycles. As a result, Fe2O3@C@Mn3O4 as an anode material has a great potential for LIBs. (C) 2020 Elsevier B.V. All rights reserved.