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Covalent Assembly of MoS2 Nanosheets with SnS Nanodots as Linkages for Lithium/Sodium-Ion Batteries |
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| Authors: | Jiajia Ru Ting He Binjie Chen Yutong Feng Lianhai Zu Prof. Zhijun Wang Prof. Qiaobao Zhang Tianzi Hao Ruijin Meng Prof. Renchao Che Prof. Chi Zhang Prof. Jinhu Yang |
| Affiliation: | 1. School of Chemical Science and Engineering, Tongji University, Shanghai, 200092 P. R. China Research Center for Translational Medicine & Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, No. 150 Jimo Road, Shanghai, 200120 P. R. China These authors contributed equally to this work.;2. Research Center for Translational Medicine & Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, No. 150 Jimo Road, Shanghai, 200120 P. R. China;3. School of Chemical Science and Engineering, Tongji University, Shanghai, 200092 P. R. China;4. School of Chemistry and Chemical Engineering, Jinggangshan University, Ji'an, Jiangxi, 343009 P. R. China;5. Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005 Fujian, P. R. China;6. Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai, 200438 P. R. China |
| Abstract: | Weak van der Waals interactions between interlayers of two-dimensional layered materials result in disabled across-interlayer electron transfer and poor layered structural stability, seriously deteriorating their performance in energy applications. Herein, we propose a novel covalent assembly strategy for MoS2 nanosheets to realize unique MoS2/SnS hollow superassemblies (HSs) by using SnS nanodots as covalent linkages. The covalent assembly based on all-inorganic and carbon-free concept enables effective across-interlayer electron transfer, facilitated ion diffusion kinetics, and outstanding mechanical stability, which are evidenced by experimental characterization, DFT calculations, and mechanical simulations. Consequently, the MoS2/SnS HSs exhibit superb rate performance and long cycling stability in lithium-ion batteries, representing the best comprehensive performance in carbon-free MoS2-based anodes to date. Moreover, the MoS2/SnS HSs also show excellent sodium storage performance in sodium-ion batteries. |
| Keywords: | covalent assembly lithium-ion batteries MoS2 nanosheets SnS nanodots sodium-ion batteries |