Citation: Ming CHEN, Jun-Mei ZHAO, Chuan-Fu SUN. High-volumetric-capacity WSe₂ Anode for Potassium-ion Batteries[J]. Chinese Journal of Structural Chemistry, ;2021, 40(7): 926-932. doi: 10.14102/j.cnki.0254–5861.2011–3106 shu

High-volumetric-capacity WSe₂ Anode for Potassium-ion Batteries

Ming CHEN ^{a, b} ,
Jun-Mei ZHAO ^c ,
Chuan-Fu SUN ^{b, d,,}

a.
College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
b.
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
c.
Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
d.
University of Chinese Academy of Sciences, Beijing 100039, China

Corresponding author: Chuan-Fu SUN, cfsun@fjirsm.ac.cn
Received Date: 20 January 2021
Accepted Date: 21 February 2021

Fund Project: the National Natural Science Foundation of China 21771180the National Natural Science Foundation of China 21971239Natural Science Foundation of Fujian Province 2020J06032

Figures(4)

Exploring high-capacity electrode materials is critical for the development of K-ion batteries. In this work, we report a layered-structured tungsten selenide (WSe₂) anode, which not only delivers an ultrahigh volumetric capacity of 1772.8 Ah/L (or 188.4 mAh/g) at a current density of 5 mA/g but also exhibits good rate capability (72 mAh/g at 200 mA/g) and cycling stability (83.14% capacity retention over 100 cycles at 100 mA/g). We have also revealed the underlying reaction mechanism through ex situ X-ray powder diffraction. Furthermore, proof-of-concept full-cell batteries comprising of WSe₂ anodes and Prussian Blue cathodes are capable of delivering an energy density of 135.2 Wh/kg_{cathode+anode}. This work highlights the potential of WSe₂ as a promising high-volumetric-capacity anode material for rechargeable potassium-ion batteries.
- tungsten selenide,
- potassium-ion batteries,
- high volumetric capacity,
- conversion reaction
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High-volumetric-capacity WSe2 Anode for Potassium-ion Batteries

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通讯作者: 陈斌, bchen63@163.com

High-volumetric-capacity WSe₂ Anode for Potassium-ion Batteries