首页|Viologen-based ionic conjugated mesoporous polymer as the electron conveyer for efficient polysulfide trapping and conversion

Viologen-based ionic conjugated mesoporous polymer as the electron conveyer for efficient polysulfide trapping and conversion

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The commercialization of lithium-sulfur(Li-S)batteries has been hindered by the shuttle effect and slug-gish redox kinetics of lithium polysulfides(LiPSs).Herein,we reported a viologen-based ionic conjugated mesoporous polymer(TpV-Cl),which acts as the cathode host for modifying Li-S batteries.The viologen component serves as a reversible electron conveyer,leading to a comprehensive enhancement in the adsorption of polysulfides and improved conversion rate of polysulfides during the electrochemical pro-cess.As a result,the S@TpV-PS cathode exhibits outstanding cycling performance,achieving 300 cycles at 2.0 C(1 C=1675 mA g-1)with low decay rate of 0.032％per cycle.Even at a high sulfur loading of 4.0 mg cm-2,S@TpV-PS shows excellent cycling stability with a Coulombic efficiency of up to 98％.These results highlight the significant potential of S@TpV-PS in developing high-performance Li-S batteries.

ViologenConjugated mesoporous polymerLithium-sulfur batteryPolysulfideShuttle effect

Hai-Yang Li、Zhong-Shan Li、Gang-Hao Qiu、Rou-Rou Zhang、Ya-Rui Wang、Feng Wang、Ren-Wu Huang、Xiao-Fei Liu、Shuang-Quan Zang

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Henan Key Laboratory of Crystalline Molecular Functional Materials,Henan International Joint Laboratory of Tumor Theranostical Cluster Materials,Key Laboratory of Special Environmental Functional Materials(Zhengzhou University),Ministry of Education,Green Catalysis Center,and College of Chemistry,Zhengzhou University,Zhengzhou 450001,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaZhongyuan Thousand Talents(Zhongyuan Scholars)Program of Henan ProvinceNatural Science Foundation of Henan ProvinceZhengzhou University

21825106920612012220521022171248234000510007222300420289

2024

10.1016/j.scib.2024.01.016

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(8)
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