首页|Atomically precise Ag30Pd4 nanocluster as efficient polysulfides redox catalyst in Li-S batteries

Atomically precise Ag30Pd4 nanocluster as efficient polysulfides redox catalyst in Li-S batteries

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Regulating the catalyst electronic structure is critical for improving the adsorption and catalytic conver-sion of lithium polysulfides(LiPSs)in lithium-sulfur batteries(Li-S),yet which has been overlooked in current studies.In this work,structurally defined Ag30Pd4 nanoclusters were loaded onto reduced gra-phene oxide(Ag30Pd4/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-π combination promotes charge transfer,influences overall charge states,and further enhances adsorption energies in potential reaction pathways with lithium polysul-fides.Consequently,the Ag30Pd4/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 lithium-sulfur battery performance.

Ag30Pd4 nanoclusterSeparator modificationLithium polysulfidesAdsorptionCatalysis

Bin Fan、Lubing Qin、Weikun Chen、Qian He、Qingya Wei、Zhenghua Tang、Yingping Zou

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College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,Hunan,China

New Energy Research Institute,School of Environment and Energy,South China University of Technology,Guangzhou 510006,Guangdong,China

Institute of Carbon Neutrality and New Energy,School of Electronics and Information,Hangzhou Dianzi University,Hangzhou 310018,Zhejiang,China

National Engineering Research Centre of Advanced Energy Storage Materials,Changsha 410199,Hunan,China

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2024

10.1016/j.jechem.2024.08.019

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.99(12)