Atomically precise Ag_(30)Pd_(4)nanocluster as efficient polysulfides redox catalyst in Li-S batteries  

作　　者：Bin Fan Lubing Qin Weikun Chen Qian He Qingya Wei Zhenghua Tang Yingping Zou 

机构地区：[1]College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,Hunan,China [2]New Energy Research Institute,School of Environment and Energy,South China University of Technology,Guangzhou 510006,Guangdong,China [3]National Engineering Research Centre of Advanced Energy Storage Materials,Changsha 410199,Hunan,China [4]Institute of Carbon Neutrality and New Energy,School of Electronics and Information,Hangzhou Dianzi University,Hangzhou 310018,Zhejiang,China

出　　处：《Journal of Energy Chemistry》2024年第12期512-521,共10页能源化学（英文版）

基　　金：supported in part by the Institute for Advanced Study of Central South University and the High Performance Computing Center of Central South University;the funding from Guangdong Natural Science Funds(No.2023A0505050107)。

摘　　要：Regulating the catalyst electronic structure is critical for improving the adsorption and catalytic conversion of lithium polysulfides(LiPSs)in lithium-sulfur batteries(Li-S),yet which has been overlooked in current studies.In this work,structurally defined Ag_(30)Pd_(4)nanoclusters were loaded onto reduced graphene oxide(Ag_(30)Pd_(4)/rGO)as a modification material for polypropylene(PP)separators to elucidate the catalytic activity towards lithium polysulfides and the impact on the electrochemical properties to lithium sulfur batteries.This unique d-πcombination promotes charge transfer,influences overall charge states,and further enhances adsorption energies in potential reaction pathways with lithium polysulfides.Consequently,the Ag_(30)Pd_(4)/rGO/PP modified batteries exhibited an exceptionally low-capacity decay rate of 0.026%per cycle at 1.0C over 1000 stable cycles and 9.75 mAh cm^(-2)excellent performance even with lean electrolyte and high sulfur loading(9.7 mg cm^(-2)).This study paves a path for employing ultrasmall bimetallic nanoclusters to promote the polysulfides redox kinetics hence boosting the lithiumsulfur battery performance.

关 键 词：Ag_(30)Pd_(4)nanocluster Separator modification Lithium polysulfides Adsorption CATALYSIS 

分 类 号：TM912[电气工程—电力电子与电力传动] O643.36[理学—物理化学] TB383.1[理学—化学]