文献类型：期刊文献

英文题名：Synergistic implementation of efficient adsorption-diffusion-conversion in lithium-sulfur batteries via built-in electric field constructed by transition metal selenides

作者：Wang, Jun[1];Huang, Kai[4];Li, Qi[1];Cheng, Guo[5];Zhang, Yongzheng[1];Teng, Na[6];Lian, Cheng[4];Ma, Cheng[3];Wang, Jitong[1,2];Qiao, Wenming[1];Ling, Licheng[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc Int, Nanning 530004, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Sch Chem & Mol Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[5]Taiyuan Inst Technol, Dept Chem & Chem Engn, Taiyuan 030008, Peoples R China;[6]Chinese Acad Sci, Inst Coal Chem, Natl Engn Lab Carbon Fiber Technol, Taiyuan 030001, Peoples R China

年份：2024

卷号：500

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20244417272407);WOS:【SCI-EXPANDED(收录号:WOS:001348545500001)】；

基金：This work is financially supported by the National Natural Science Foundation of China (Nos. U21A2060, 22178116, and No. 22308095) , the Natural Science Foundation of Shanghai (No. 22ZR1417400) , the Fundamental Research Funds for the Central Universities (222201817001, 50321041918013, JKA01221601, and JKD01241701) , and the Youth Science Fund of Shanxi Foundation (52206252) .

语种：英文

外文关键词：Lithium-sulfur batteries; Defective; Built-in electric field; Transition metal selenides; Sulfur conversion kinetics

摘要：The adsorption of lithium polysulfides (LiPSs), the transport of lithium ions, and the redox kinetics collectively play pivotal roles in determining the application of lithium-sulfur (Li-S) batteries. Herein, a defect-rich p-Co3Se4/ n-ZnSe p-n junction (ZCSNC) is engineered by chemical vapor deposition (CVD)-selenation. The n-type semiconductor ZnSe and the p-type semiconductor Co3Se4 contained in ZCSNC effectively anchor LiPSs and promote the catalytic reaction kinetics through synergistic effects, respectively. Meanwhile, the presence of heterogeneous interfaces in the p-n junction and the difference in work functions spontaneously form a built-in electric field, which promotes the transport and transfer of lithium ions and LiPSs. Therefore, the ZCSNC functional material contributes to improving the electrochemical performance of Li-S batteries through the process of adsorption-diffusion-conversion. The Li-S cells with ZCSNC-modified separators show excellent rate performance (741.1 mAh/g at 5C) and long-lasting cycling performance (only 0.04 % capacity decay per cycle over 1000 cycles). Notably, the ZCSNC still has excellent rate discharge capacities (683.9 and 649.7 mAh/g at 2C, respectively) at high sulfur loading and low temperature of 0 degrees C. This study illustrates that a p-n junction containing a built-in electric field can effectively modulate the kinetics of redox reactions of LiPSs through synergistic interactions.