Citation: Wei WANG, Jing-Ze BAO, Chuan-Fu SUN. Liquid-phase Exfoliated WS₂-Graphene Composite Anodes for Potassium-ion Batteries[J]. Chinese Journal of Structural Chemistry, ;2020, 39(3): 493-499. doi: 10.14102/j.cnki.0254-5861.2011-2457 shu

Liquid-phase Exfoliated WS₂-Graphene Composite Anodes for Potassium-ion Batteries

Wei WANG ^{a, b} ,
Jing-Ze BAO ^a ,
Chuan-Fu SUN ^a,,

a.
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
b.
University of Chinese Academy of Sciences, Beijing 100190, China

Corresponding author: Chuan-Fu SUN, cfsun@fjirsm.ac.cn
Received Date: 15 May 2019
Accepted Date: 9 July 2019

Fund Project: the National Natural Science Foundation of China 21771180the National Natural Science Foundation of China 51702318Natural Science Foundation of Fujian Province 2018J01031

Figures(3)

Tungsten disulfide (WS₂) has been recognized as a promising anode material for rechargeable potassium-ion batteries (PIBs). However, its K-ion intercalation capacity is limited to ~60 mAh·g^-1. Here, we report a WS₂-graphene composite anode which is fabricated through simple filtration of liquid-phase exfoliated WS₂ and graphene nanosheet delivers a significantly improved specific capacity of 137 mAh·g^-1 at a current density of 10 mA·g^-1. The composite anodes also exhibit remarkable rate capability and long-term cyclability over 500 cycles. These results highlight the WS₂-graphene composite structure as a promising anode material for long lifespan rechargeable potassium-ion batteries.
- tungsten disulfide,
- liquid-phase exfoliation,
- K-ion battery,
- grapheme
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Liquid-phase Exfoliated WS₂-Graphene Composite Anodes for Potassium-ion Batteries