High rate capability and superior cycle stability of a flower-like Sb2S3 anode for high-capacity sodium ion batteries

Flower-like antimony sulfide structures were prepared by a simple and easy polyol reflux process. When tested as an anode for sodium ion batteries, the material delivered a high reversible capacity of 835.3 mA h g(-1) at 50 mA g(-1) after 50 cycles and maintained a capacity of 641.7 mA h g(-1) at 20...

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Published inNanoscale Vol. 7; no. 7; pp. 3309 - 3315
Main Authors Zhu, Yaoyao, Nie, Ping, Shen, Laifa, Dong, Shengyang, Sheng, Qi, Li, Hongsen, Luo, Haifeng, Zhang, Xiaogang
Format Journal Article
LanguageEnglish
Published England 21.02.2015
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Summary:Flower-like antimony sulfide structures were prepared by a simple and easy polyol reflux process. When tested as an anode for sodium ion batteries, the material delivered a high reversible capacity of 835.3 mA h g(-1) at 50 mA g(-1) after 50 cycles and maintained a capacity of 641.7 mA h g(-1) at 200 mA g(-1) after 100 cycles. Even up to 2000 mA g(-1), a capacity of 553.1 mA h g(-1) was obtained, indicating an excellent cycle performance and a superior rate capability. The mechanism of the formation of the micro-flowers was also investigated. The additive used facilitates the controlled release of the reactant to form uniform, shaped nanosheets and an optimum reaction time allows the nanosheets to self-assemble into micro-flowers.
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ISSN:2040-3372
DOI:10.1039/c4nr05242k