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In-situ synthesized SnSe nanorods in SnOx@CNFs membrane toward high-performance freestanding and binder-free lithiumion batteries

Abstract

The poor reversibility of the first conversion reaction (SnO2+4Li++4e-→Sn+2Li2O) and the inferior electrical conductivity of resultant Li2O make tin oxides cannot make full use of their lithium storage performance. In this study, various amounts of SnSe nanorods were in-situ incorporated into SnOx@CNFs via electrospinning and thermal treatment process. The binder-free SnSe/SnOx@CNFs exhibit greatly enhanced lithium-ion storage performance due to the higher electrical conductivity, faster Li-ion diffusivity, and better reversible ability. The optimal SnSe/SnOx@CNFs exhibited a higher initial coulombic efficiency (86.5%) and better reversible capacity (740.7 mAh g−1 at the 200 mA g-1 after 70 cycles) than pristine SnOx@CNFs. Moreover, the high capacity of the SnSe/SnOx@CNFs electrode can be maintained as high as 345 mAh g-1 at 1 A g-1 over 1000 cycles, demonstrating the robust long-term stability. This work provides new insights for designing high-performance tin-based anode materials for lithium-ion batteries.

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Publication details

The article was received on 01 Dec 2017, accepted on 09 Feb 2018 and first published on 09 Feb 2018


Article type: Research Article
DOI: 10.1039/C7QI00762K
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    In-situ synthesized SnSe nanorods in SnOx@CNFs membrane toward high-performance freestanding and binder-free lithiumion batteries

    H. Yuan, Y. Jin, J. Lan, Y. Liu, Y. Yu and X. Yang, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C7QI00762K

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