紫精基离子型共轭微孔聚合物作为电子传输泵用于高效多硫化物捕获和转化  

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

作　　者：李海洋 李中山 邱刚浩 张柔柔 王亚蕊 王凤 黄仁武 刘晓飞 臧双全 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(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)

机构地区：[1]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

出　　处：《Science Bulletin》2024年第8期1071-1080,共10页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(21825106,92061201,22205210,and 22171248);the Zhongyuan Thousand Talents(Zhongyuan Scholars)Program of Henan Province(234000510007);the Natural Science Foundation of Henan Province(222300420289);Zhengzhou University。

摘　　要：The commercialization of lithium-sulfur(Li-S)batteries has been hindered by the shuttle effect and sluggish redox kinetics of lithium polysulfides(LiPSs).Herein,we reported a viologen-ba sed 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 process.As a result,the S@TpV-PS cathode exhibits outstanding cycling performance,achieving 300 cycles at2.0 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.

关 键 词：VIOLOGEN Conjugated mesoporous polymer Lithium-sulfur battery POLYSULFIDE Shuttle effect 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ317[化学工程—高聚物工业]