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PEDOT-PSS Coated VS2 Nanosheets Anodes for High Rate and Ultrastable Lithium-Ion Batteries

Abstract

As a typical member of transition metal dichalcogenides (TMDs), VS2 is regarded as a promising substitute for the traditional carbon anode due to its high theoretical specific capacity. However, the practical application of VS2 has been seriously limited by the grievous capacity decay. Herein, VS2 nanosheets coated with PEDOT-PSS (poly (styrenesulfonate)-doped poly (3,4-ethylenedioxythiophene)) were prepared by a simple and gentle aqueous solution method. Compared with un-coated VS2, the 5VS2@PEDOT-PSS presents higher reversible capacity of 569.0 mAh g-1 at 0.1 A g-1 after 100 cycles. Even at very high current density of 2 A g-1, the composites still deliver a good reversible performance of 186.8 mAh g-1 after 1000 cycles. The excellent electrochemical performance of 5VS2@PEDOT-PSS can be attributed to the special sheets-like structure of VS2 and the decreased charge transfer resistance of the conducting coating systems.

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Publication details

The article was received on 06 Nov 2018, accepted on 05 Dec 2018 and first published on 06 Dec 2018


Article type: Paper
DOI: 10.1039/C8NJ05636F
Citation: New J. Chem., 2018, Accepted Manuscript
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    PEDOT-PSS Coated VS2 Nanosheets Anodes for High Rate and Ultrastable Lithium-Ion Batteries

    Z. Ding, Q. Zhang, Y. Chen, G. Liu, X. Xin, H. He, B. Cai, J. Wu and X. Yao, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ05636F

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