文献类型：期刊文献

英文题名：Donor dominated triazine-based microporous polymer as a polysulfide immobilizer and catalyst for high-performance lithium-sulfur batteries

作者：Xu, Jie[1];Yu, Fengtao[2,3,4];Hua, Jianli[2,3];Tang, Weiqiang[1];Yang, Chao[5];Hu, Shuozhen[1];Zhao, Shuangliang[1];Zhang, Xinsheng[1];Xin, Zhong[1];Niu, Dongfang[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Chinese Univ Sci & Technol, Inst Fine Chem, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Chinese Univ Sci & Technol, Dept Chem East, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]East China Univ Technol, Sch Chem Biol & Mat Sci, State Key Lab Nucl Resources & Environm, Nanchang 330013, Jiangxi, Peoples R China;[5]Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China

年份：2020

卷号：392

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20195107878070);WOS:【SCI-EXPANDED(收录号:WOS:000525862500060)】；

基金：J. Xu and F. Yu contributed equally to this work. This work was financially supported by National Key Research and Development Program of China (NO. 2017YFB0307500), and Shanghai Pujiang Program (No. 18PJ14020000). National Natural Science Foundation of China (21421004, 21772040 and 21572062), Shanghai Municipal Science and Technology Major Project (No. 2018SHZDZX03), the Fundamental Research Funds for the Central Universities (222201717003) and the Programme of Introducing Talents of Discipline to Universities (B16017). The authors also thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：Covalent triazine polymers; Li-S batteries; Coating layer; Catalytic activity; Theoretical calculations

摘要：Triazine-based framework is an attractive organic polymer with microporous structure and high nitrogen content that could retard the shuttle of polysulfides for high-performance lithium-sulfur (Li-S) batteries. However, insight into the role of pi-conjugated donor of triazine-based polymer in immobilizing and catalyzing polysulfides is still deficient. Here, two homologous conjugated buildings of triazine unit combining with perylene (GIV-1) and spirobifluorene (CFP-2) were reasonably synthesized through one-pot Suzuki-Miyaura coupling reaction with a high yield of 92% and served as the polysulfides immobilizer and catalyst to achieve high-performance Li-S batteries. Compared with the counterpart of CTP-2, the fully conjugated G1P-1 modified separator possesses a higher ionic conductivity and Li m transference number presenting more efficient shuttle inhibition and faster kinetics in catalyzing polysulfides conversion. Theoretical calculations demonstrate that the G1P-1 with perylene donor features narrower bandgap and faster electron transfer exhibiting stronger binding ability toward polysulfides than CFP-2. This work broadens the understanding of donor dominated chemical immobilizing and catalysis of triazine-based materials in Li-S batteries, and provides guidance for the future design of organic materials in other energy storage systems.