The shuttle effect caused by soluble lithium polysulfides(LiPSs)deteriorates multiphase transformation reaction kinetics of sulfur species,and gives rise to an unserviceable lithium-sulfur(Li-S)battery.Catalysis,as a process optimization approach,offers an option to eliminate the intrinsic issues.However,exploring and understanding the role of catalysts on electrode reaction remains critical bottle-necks,particularly as they are prone to continuous evolution under complex dynamic environment.Herein,platinum nanoparticles loaded on MXene nanosheets,as sulfur host,and the action of catalysts on the reaction process are investigated via ex-situ monitors upon solid-liquid-solid chemical transfor-mation of sulfur species.These traces confirm that the high performance originates from electron transfer between catalysts and LiPSs,which lowers the nucleation barrier from liquid LiPSs to solid Li2S/Li2S2.Further,the accelerated liquid-solid conversion can alleviate the accumulation of LiPSs,and boost the reaction kinetics in Li-S batteries.The findings corroborate the electronic modulation between catalysts and LiPSs,which is a generalizable strategy to optimize energy conversion efficiency of Li-S batteries.

Qinhua Gu;Yujie Qi;Wuxing Hua;Tongxin Shang;Junnan Chen;Luozhen Jiang;Lina Li;Ming Lu;Yixiao Zhang;Xi Liu;Ying Wan;Bingsen Zhang

Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,Liaoning,China;Nanoyang Group,State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;Key Laboratory of Resource Chemistry of Ministry of Education,Shanghai Key Laboratory of Rare Earth Functional Materials,and Department of Chemistry,Shanghai Normal University,Shanghai 200234,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;Key Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of Education,The Joint Laboratory of MXene Materials,Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,Jilin Normal University,Changchun 130103,Jilin,China;School of Chemistry and Chemical Engineering,In-situ Center for Physical Science,Shanghai Jiao Tong University,Shanghai 200240,China

能源化学

[1]Qinhua Gu;Yujie Qi;Wuxing Hua;Tongxin Shang;Junnan Chen;Luozhen Jiang;Lina Li;Ming Lu;Yixiao Zhang;Xi Liu;Ying Wan;Bingsen Zhang-.Engineering Pt heterogeneous catalysts for accelerated liquid-solid redox conversion in Li-S batteries)[J].能源化学,2022(06):490-496

unserviceable,necks

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