Solution-based Preparation of High Sulfur Content Sulfur/Graphene Cathode Material for Li-S Battery

doi:10.1007/s40242-021-0036-7

Chemical Research in Chinese Universities ›› 2021, Vol. 37 ›› Issue (2): 323-327.doi: 10.1007/s40242-021-0036-7

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Solution-based Preparation of High Sulfur Content Sulfur/Graphene Cathode Material for Li-S Battery

ZHANG Chen¹, LIU Donghai^2,3, GENG Chuannan^2,3, HUA Wuxing^2,3, TANG Quanjun¹, LING Guowei¹, YANG Quan-Hong^2,3,4

1. School of Marine Science and Technology, Tianjin University, Tianjin 300072, P. R. China;
2. Nanoyang Group, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China;
3. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China;
4. Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, P. R. China

Received:2021-01-27 Online:2021-04-01 Published:2021-02-25
Contact: LING Guowei, YANG Quan-Hong E-mail:lgw@tju.edu.cn;qhyangcn@tju.edu.cn
Supported by:
This work was supported by the National Key Research and Development Program of China(No.2018YFE0124500), the Young Elite Scientists Sponsorship Program by Tianjin of China(No.TJSQNTJ-2020-11) and the National Natural Science Foundation of China(Nos.51932005, U1710109).

Abstract

Abstract: Practical Li-sulfur batteries require the high sulfur loading cathode to meet the large-capacity power demand of electrical equipment. However, the sulfur content in cathode materials is usually unsatisfactory due to the excessive use of carbon for improving the conductivity. Traditional cathode fabrication strategies can hardly realize both high sulfur content and homogeneous sulfur distribution without aggregation. Herein, we designed a cathode material with ultrahigh sulfur content of 88%(mass fraction) by uniformly distributing the water dispersible sulfur nanoparticles on three-dimensionally conductive graphene framework. The water processable fabrication can maximize the homogeneous contact between sulfur nanoparticles and graphene, improving the utilization of the interconnected conductive surface. The obtained cathode material showed a capacity of 500 mA·h/g after 500 cycles at 2.0 A/g with an areal loading of 2 mg/cm². This strategy provides possibility for the mass production of high-performance electrode materials for high-capacity Li-S battery.

Key words: Li-sulfur battery, High sulfur loading, Polysulfides shuttling

ZHANG Chen, LIU Donghai, GENG Chuannan, HUA Wuxing, TANG Quanjun, LING Guowei, YANG Quan-Hong. Solution-based Preparation of High Sulfur Content Sulfur/Graphene Cathode Material for Li-S Battery[J]. Chemical Research in Chinese Universities, 2021, 37(2): 323-327.

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Solution-based Preparation of High Sulfur Content Sulfur/Graphene Cathode Material for Li-S Battery

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