中国化学快报(英文版)2024，Vol.35Issue(5) ：434-440.DOI:10.1016/j.cclet.2023.108473

Novel 2D bifunctional layered rare-earth hydroxides@GO catalyst as a functional interlayer for improved liquid-solid conversion of polysulfides in lithium-sulfur batteries

Haodong Wang Xiaoxu Lai Chi Chen Pei Shi Houzhao Wan Hao Wang Xingguang Chen Dan Sun
中国化学快报(英文版)2024，Vol.35Issue(5) ：434-440.DOI:10.1016/j.cclet.2023.108473
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Novel 2D bifunctional layered rare-earth hydroxides@GO catalyst as a functional interlayer for improved liquid-solid conversion of polysulfides in lithium-sulfur batteries

Haodong Wang 1Xiaoxu Lai 2Chi Chen 2Pei Shi 3Houzhao Wan 3Hao Wang 3Xingguang Chen 1Dan Sun2
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作者信息

  • 1. CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;College of Chemistry and Materials,Fujian Normal University,Fuzhou 350007,China;Xiamen Institute of Rare Earth Materials,Haixi Institutes,Chinese Academy of Sciences,Xiamen 361021,China;Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials,Xiamen 361021,China
  • 2. CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;Xiamen Institute of Rare Earth Materials,Haixi Institutes,Chinese Academy of Sciences,Xiamen 361021,China;Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials,Xiamen 361021,China
  • 3. School of Microelectronics,Hubei University,Wuhan 430062,China
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Abstract

The detrimental"shuttle effect"of lithium polysulfides(LiPSs)together with sluggish multi-order reac-tion kinetics are the main drawbacks hindering lithium-sulfur(Li-S)batteries from commercial success.Here,we first propose the implementability of layered rare-earth hydroxides(LREHs)in Li-S batteries to optimize electrochemical performance.In this work,a two-dimensional(2D)rare-earth-based composite constructed by the layered gadolinium hydroxy chloride[Gd2(OH)5(H2O)n]Cl nanoplates(LGdH NPs)and graphene oxide(GO)was designed as a sulfur immobilizer for Li-S batteries.Combining the experimental results and density functional theory(DFT)calculations,it is revealed that the LGdH@GO composite not only provides a strong anchoring of the intermediates during cycling,but also acts as an effective catalyst to accelerate the liquid-solid conversion of polysulfides.The Li-S batteries assembled by LGdH@GO mod-ified separators delivered a superior rate performance with a specific capacity of 605.34 mAh/g at 5 C,as well as excellent cycle stability with a decay rate of 0.087％over 500 cycles at 2 C.This study provided a deep understanding of the mechanism to suppress the"shuttle effect"by the LREHs,and a guide to design effective functional interlayers for high-performance Li-S batteries with excellent electrocatalytic activity.

Key words

Lithium-sulfur batteries/Functional separator/Layered rare-earth hydroxides/Shuttle effect/Adsorption/Catalysis

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基金项目

National Science Foundation for Youths of China(22209184)

National Science Foundation for Youths of China(22109163)

出版年

2024
中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
参考文献量54
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