MoS2 Nanoflowers with Expanded Interlayers as High-Performance Anodes for Sodium-Ion Batteries

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題名:	MoS2 Nanoflowers with Expanded Interlayers as High-Performance Anodes for Sodium-Ion Batteries
作者:	鄭芳怡;Hu, Zhe;Wang, Lixiu;Zhang, Kai;Wang, Jianbin;Cheng, Fangyi;Tao, Zhanliang;Chen, Jun
貢獻者:	地球科學學院大氣科學學系
關鍵詞:	electrochemical exfoliation;Electrochemistry;expanded layers;MoS2;pseudocapacitance;sodium-ion batteries
日期:	2014-11-01
上傳時間:	2026-04-21 13:58:22 (UTC+8)
出版者:	John Wiley and Sons Ltd;Weinheim: WILEY-VCH Verlag
摘要:	摘要： MoS2 nanoflowers with expanded interlayer spacing of the (002) plane were synthesized and used as high‐performance anode in Na‐ion batteries. By controlling the cut‐off voltage to the range of 0.4–3 V, an intercalation mechanism rather than a conversion reaction is taking place. The MoS2 nanoflower electrode shows high discharge capacities of 350 mAh g−1 at 0.05 A g−1, 300 mAh g−1 at 1 A g−1, and 195 mAh g−1 at 10 A g−1. An initial capacity increase with cycling is caused by peeling off MoS2 layers, which produces more active sites for Na+ storage. The stripping of MoS2 layers occurring in charge/discharge cycling contributes to the enhanced kinetics and low energy barrier for the intercalation of Na+ ions. The electrochemical reaction is mainly controlled by the capacitive process, which facilitates the high‐rate capability. Therefore, MoS2 nanoflowers with expanded interlayers hold promise for rechargeable Na‐ion batteries. More active sites through peeling: MoS2 nanoflowers with expanded interlayers were investigated as a high‐performance anode material for Na‐ion batteries. Excellent discharge capacities and high cycling stability were observed and were directly correlated with the expanded layer space and the decreased layer numbers. 其他題名： Angew. Chem. Int. Ed 出版者： Weinheim: WILEY-VCH Verlag 出版日期： 2014-11-17 出處： Angewandte Chemie International Edition, 2014-11, Vol.53 (47), p.12794-12798 資源來源： Wiley Online Library 版權： 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim 版權： 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. 版權： 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 識別號： ISSN: 1433-7851 識別號： ISSN: 1521-3773 識別號： EISSN: 1521-3773 識別號： DOI: 10.1002/anie.201407898 識別號： PMID: 25251780 識別號： CODEN: ACIEAY
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