Issue 4, 2019

PEDOT-PSS coated VS2 nanosheet 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 mA h g−1 at 0.1 A g−1 after 100 cycles. Even at a very high current density of 2 A g−1, the composites still deliver a good reversible performance of 186.8 mA h g−1 after 1000 cycles. The excellent electrochemical performance of 5VS2@PEDOT-PSS can be attributed to the special sheet-like structure of VS2 and the decreased charge transfer resistance of the conducting coating systems.

Graphical abstract: PEDOT-PSS coated VS2 nanosheet anodes for high rate and ultrastable lithium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
06 Nov 2018
Accepted
05 Dec 2018
First published
06 Dec 2018

New J. Chem., 2019,43, 1681-1687

PEDOT-PSS coated VS2 nanosheet 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., 2019, 43, 1681 DOI: 10.1039/C8NJ05636F

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