文献类型：期刊文献

英文题名：A Highly Conductive COF@CNT Electrocatalyst Boosting Polysulfide Conversion for Li-S Chemistry

作者：Xu, Jie[1,2,3,4];Tang, Weiqiang[5];Yang, Chao[6];Manke, Ingo[6];Chen, Nan[7];Lai, Feili[8];Xu, Ting[1,2];An, Shuhao[1,2];Liu, Honglai[1,2];Zhang, Zhiliang[5];Cao, Yongjie[3,4];Wang, Nan[3,4];Zhao, Shuangliang[5,9,10];Niu, Dongfang[5];Chen, Renjie[7]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]Fudan Univ, Dept Chem, Inst New Energy, Collaborat Innovat Ctr Chem Energy Mat, Shanghai 200433, Peoples R China;[4]Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Inst New Energy, Collaborat Innovat Ctr Chem Energy Mat, Shanghai 200433, Peoples R China;[5]East China Univ Sci & Technol, State Key Lab Chem Engn, Sch Chem Engn, Shanghai 200237, Peoples R China;[6]Helmholtz Zentrum Berlin Mat & Energie, D-14109 Berlin, Germany;[7]Beijing Inst Technol, Beijing Key Lab Environm Sci & Engn, Sch Mat Sci & Engn, Beijing, Peoples R China;[8]Katholieke Univ Leuven, Dept Chem, B-3001 Leuven, Belgium;[9]Guangxi Univ, Guangxi Key Lab Petrochem Resource Proc & Proc In, Nanning 530004, Peoples R China;[10]Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

年份：2021

卷号：6

期号：9

起止页码：3053

外文期刊名：ACS ENERGY LETTERS

收录：;EI(收录号：20213610849195);WOS:【SCI-EXPANDED(收录号:WOS:000696180500006)】；

基金：This work was partially supported by the National Natural Science Foundation of China (Nos. 91834301 and 22008064) and China Postdoctoral Science Foundation (No. 2019M661408, 2021M690662). We also thank the Research Center of Analysis and Test of East China University of Science and Technology for help with the characterization.

语种：英文

外文关键词：Density functional theory - Electrocatalysis - Lithium compounds - Decay (organic) - Electrolytes - X ray photoelectron spectroscopy - Electrocatalysts - Polysulfides - Chemical bonds

摘要：The catalysis of covalent organic frameworks (COFs) in Li-S chemistry is largely blocked by a weak chemical interaction and low conductivity. Herein, a new kind of diketopyrrolopyrrole (DPP)-based COF is in situ fabricated onto the carbon nanotube (CNT) surface (denoted as COF@CNT) to uncover the electrocatalysis behavior by its strong chemical interaction and highly conductive property. We declare that the electrocatalytic activity of DPP-COF can be maximized by introducing an appropriate content of CNT (66 wt %); the analyses including density functional theory calculations, X-ray photoelectron spectroscopy, Fourier transform infrared, and Raman show that the DPP moiety can mediate the conversion of polysulfides contributed by a C=O/C-O bonding conversion. Hence, the modified battery shows a 0.042% decay rate over 1000 cycles and achieves a desirable capacity of 8.7 mAh cm(-2) with 10 mg cm(-2) sulfur loading and lean electrolyte (E/S = 5). This work will inspire the rational design of COF@support hybrids for various electrocatalysis applications.