首页|High entropy alloy nanoparticles dual-decorated with nitrogen-doped carbon and carbon nanotubes as promising electrocatalysts for lithium-sulfur batteries

High entropy alloy nanoparticles dual-decorated with nitrogen-doped carbon and carbon nanotubes as promising electrocatalysts for lithium-sulfur batteries

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Lithium-sulfur(Li-S)batteries have the advantages of high-energy-density,low cost,and environmental friendliness,but the sluggish sulfur redox reactions and the severe shuttle effect of lithium polysulfide(LiPSs)affect their performance.Herein,we developed a highly efficient electrocatalyst(CNT/HEA-NC)consisting of high-entropy alloy(HEA)nanoparticles decorated with nitrogen-doped carbon(NC)and car-bon nanotubes(CNTs)conductive networks.In the elaborate nanostructured protocol,the HEA nanopar-ticles with high catalytic activity accelerate the bidirectional conversion of LiPSs,the NC with strong sul-fophilic activity effectively adsorb LiPSs to suppress the shuttle effect,and the CNT conductive network provides a fast electrons/ions transport pathway.Benefiting from the hierarchical confinement,Li-S bat-teries with CNT/HEA-NC modified separators deliver a discharge specific capacity of 692.0 mA h g-1 after 300 cycles at 1 C with a capacity decay rate of only 0.03％per cycle.Even at a current density of 5 C,the cell exhibits a superior capacity of 521.1 mAh g-1.This work provides a general strategy for integrating multifunctional electrocatalysts for high-performance Li-S batteries.

High-entropy alloyNitrogen-doped carbonShuttle effectElectrocatalystLi-S batteries

Yujie Ma、Yilun Ren、Dongyue Sun、Biao Wang、Hao Wu、Haifeng Bian、Jiangdong Cao、Xueyu Cao、Feng Ding、Jiahao Lu、Xiangkang Meng

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School of Intelligent Manufacturing and Information,Jiangsu Shipping College,Nantong 226010,China

National Laboratory of Solid State Microstructures,Collaborative Innovation Center of Advanced Microstructures,College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China

Jiangsu Carbon Peak Carbon Neutralization Science and Technology Innovation Special FundFundamental Research Funds for the Central UniversitiesNational Natural Science Foundation of ChinaNatural Science Foundation of the Jiangsu Higher Education Institutions of ChinaNatural Science Foundation of the Jiangsu Higher Education Institutions of ChinaNatural Science Foundation of Jiangsu ProvinceNantong Basic Science Research Program

BE2022605143801632207528821KJA46001423KJB430012BK20231227JC12022056

2024

10.1016/j.jmst.2023.11.063

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.188(21)
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