期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 8, 期 25, 页码 9519-9525出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c02535
关键词
SnS2; S vacancy; anode; density functional theory; sodium-ion battery
资金
- National Natural Science Foundation of China [U1505241, 21703036]
- Fujian Provincial Project [2019H6005]
SnS2-based materials have been intensively explored as an anode for sodium-ion batteries. In the present study, hierarchical SnS2 microspheres with S vacancy have been successfully synthesized via a one-step solvothermal process, and it is found that the amount of thioacetamide in the synthetic process plays an important role in morphology and amounts of S vacancies. A series of results calculated from density functional theory has indicated that the introduction of S vacancies could effectively decrease the band gap. As a consequence, the hierarchical SnS2 microspheres exhibit an excellent sodium storage performance, and a large capacity of 486.2 mA h g(-1) can be achieved after 1000 cycles at 1 A g(-1).
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