Enhancing Li-S battery performance via functional polymer binders for polysulfide inhibition  被引量:1

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作  者:Jinpeng Jian Qian Chen Hao Sun Rui Li Yaolin Hou Yulong Liu Jia Liu Haiming Xie Jiefang Zhu 

机构地区:[1]Nation&Local United Engineering Laboratory for Power Batteries,Faculty of Chemistry,Northeast Normal University,Changchun 130024,Jjilin,China [2]Jilin Province Dongchi New Energy Technology Co.,Ltd.Changchun 13000o,Jilin,China [3]Department of Chemistry-Angstrom Laboratory,Uppsala University,SE-75121,Sweden

出  处:《Journal of Energy Chemistry》2024年第10期228-236,I0005,共10页能源化学(英文版)

基  金:supported by the Science and Technology Project of Jilin Provincial Education Department (JJKH20221160KJ);the Jilin Province Science and Technology Department (20230402059GH);the National Natural Science Foundation of China (22279014)。

摘  要:The commercialization of lithium-sulfur(Li-S)batteries faces several challenges,including poor conductivity,unexpected volume expansion,and continuous sulfur loss from the cathode due to redox shuttling.In this study,we introduce a novel polymer via a simple cross-linking between poly(ether-thioureas)(PETU)and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT:PSS)as a bifunctio nal binder for Li-S batteries(devotes as"PPTU").Compared to polyvinylidene fluoride(PVDF),as-prepared PPTU exhibits significantly higher electrical conductivity,facilitating electrochemical reactions.Additionally,PPTU demonstrates effective adsorption of lithium polysulfides,leading to improved cycling stability by suppressing the shuttling effect.We investigate this behavior by monitoring morphological changes at the cell interface using synchrotron X-ray tomography.Cells with PPTU binders exhibit remarkable rate performance,desired reversibility,and excellent cycling stability even under stringent bending and twisting conditions.Our work represents promising progress in functional polymer binder development for Li-S batteries.

关 键 词:Li-S batteries Bifunctional binders Electrode conductivity Shuttle effect 

分 类 号:TM912[电气工程—电力电子与电力传动] TQ430.7[化学工程]

 

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