Readily Exfoliated TiSe Nanosheets for High-Performance Sodium Storage.
作者信息
Zhang Dan, Zhao Guoqiang, Li Peng, Zhang Yu, Qiu Wenbin, Shu Jie, Jiang Yinzhu, Dou Shi Xue, Sun Wenping
机构信息
State Key Laboratory of Silicon Materials, Key Laboratory of Novel Materials for, Information Technology of Zhejiang Province and, Key Laboratory of Advanced Materials, and Applications for Batteries of Zhejiang Province, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, P. R. China.
Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Wollongong, NSW, 2522, Australia.
出版信息
Chemistry. 2018 Jan 24;24(5):1193-1197. doi: 10.1002/chem.201704661. Epub 2017 Dec 13.
Materials with sheet-like morphologies are highly desirable candidates for energy storage and conversion applications, due to the confined atomic thickness and high surface area, which would largely improve the electrochemical reaction kinetics. In this work, the sodium storage performance of TiSe nanosheets and corresponding sodiation/desodiation reaction mechanism are studied for the first time. TiSe nanosheets are readily exfoliated from bulk TiSe after quick ultrasonication or grinding. The TiSe nanosheets exhibit a reversible capacity of 147 mAh g at 0.1 A g , and show excellent rate capability with a capacity of 103 mAh g at an ultra-high current density of 10.0 A g . The combined in situ XRD and ex-situ HRTEM results suggest that sodium storage in TiSe is achieved through a multi-step intercalation/deintercalation mechanism. Besides, TiSe might be a promising 2D nanomaterial platform for other energy and electronic applications due to its easy exfoliation and unique physicochemical properties.
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