Design and synthesis of carbon-coated α-Fe2O3@Fe3O4 heterostructured as anode materials for lithium ion batteries
Design and synthesis of carbon-coated α-Fe2O3@Fe3O4 heterostructured as anode materials for lithium ion batteries
复制标题
碳包覆α-Fe2O3@Fe3O4异质结构锂离子电池负极材料的设计与合成
DOI：
10.1016/j.apsusc.2019.143590
复制
发表时间：
2019-11-30
影响因子：
6.7
通讯作者：
Hao, Ai-min
中科院分区：
文献类型：
--
作者：
Liu, Huan;Luo, Shao-hua;Hao, Ai-min
In this study, carbon-coated alpha-Fe2O3@Fe3O4 heterostructures were designed and synthesized by a simple ballmilling and an auxiliary rheological phase method combined with carbothermal reduction. Due to the synergistic effect between alpha-Fe2O3 and Fe3O4, the carbon-coated alpha-Fe2O3@Fe3O4 heterostructures have an excellent electrochemical performance. In order to elucidate the reaction process, the types of gases produced during the pyrolysis of citric acid are preliminarily examined, and the possible chemical reactions are deduced from the experimental results. The Mossbauer spectrum is used to determine the relative ratio of alpha-Fe2O3@Fe3O4. As an anode material for lithium ion batteries, a carbon-coated Fe2O3@Fe3O4 electrode exhibits a high initial discharge/charge capacity of 1462.2/968.2 mAh g(-1) and a good reversible capacity (971.5 mAh g(-1) ) at a current density of 0.1 A g(-1). Moreover, even after 200 cycles, a reversible capacity of 711.0 mAh g(-1) can be maintained at a current density of 0.5 A g(-1).
