期刊
JOURNAL OF POWER SOURCES
卷 392, 期 -, 页码 193-199出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2018.04.107
关键词
Flower-like FeS/Fe2O3 composite; Porous structure; Synergistic performance; Lithium storage; Volume discharging/charging compatibility
资金
- National Natural Science Foundation [21573083]
- Hong Kong Research Grants Council through Early Career Scheme [25301617]
- Hong Kong Polytechnic University grant [1-ZE6G]
- [DE-SC0012704]
Transitions metal sulfides/oxides have been considered as promising anode candidates for next generation lithium-ion batteries (LIBs) due to high theoretical capacities. However, the large volume change during lithiation/delithiation process and poor electronic conductivity often result in a poor charging/discharging performance. Herein, we design a flower-like FeS/Fe2O3 composite via a simple solvothermal-oxidation method, in which the Fe2O3 is most distributed on the surface of the flower. The unique porous structure and synergistic effect between FeS and Fe2O3 not only accommodate the large volume expansion, but also facilitate Li ion and electron transport. The Fe2O3 shell effectively reduce the dissolution of Li2Sx, during discharge/charge process. When serving as the anode material in lithium ion battery, FeS/Fe2O3 exhibits superior specific capacity, rate capacity and cycling stability compared with pure FeS and Fe2O3.
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