期刊
CHEMICAL SCIENCE
卷 8, 期 1, 页码 160-164出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6sc02716d
关键词
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资金
- National Basic Research Program of China [2013CB934103]
- International Science & Technology Cooperation Program of China [2013DFA50840]
- National Natural Science Foundation of China [51521001, 51272197, 51302203]
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- Hubei Provincial Natural Science Fund for Distinguished Young Scholars [2014CFA035]
- Fundamental Research Funds for the Central Universities (WUT) [2016III001, 2016III002, 2016III003, 2016III004, 2016III006]
Transition metal dichalcogenide materials have been considered as promising anode materials for rechargeable sodium-ion batteries because of their high specific capacity and low cost. Here, we demonstrate an iron sulfide Fe3S4 as a new anode material for a rechargeable sodium-ion battery. The involved conversion mechanism has been proved when the as-prepared Fe3S4 was used as the host material for sodium storage. Remarkably, a compound FeSx with quantum size generated by conversion reaction overcame the kinetic and thermodynamic constraints of chemical conversion to achieve superior cycling and rate capability. As a result, the as-prepared Fe3S4 electrode delivers a high reversible specific capacity of 548 mA h g(-1) at 0.2 A g(-1), together with an excellent cycling stability of 275 mA h g(-1) after 3500 cycles at 20 A g(-1).
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