文献类型：期刊文献

英文题名：Defect-rich porous graphitic phase carbon nitride layer grafted MXene as desolvation promoter for efficient sulfur conversion in extremely harsh conditions

作者：Wang, Jinxin[1];Zuo, Yinze[2];Zhang, Yongzheng[1];Ma, Cheng[3];Chen, Zixin[1];Wang, Jitong[1];Qiao, Wenming[1];Ling, Licheng[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Key Lab Specially Funct Mat & Related Technol, Minist Educ, Shanghai 200237, Peoples R China;[2]Fuzhou Univ, Inst New Energy Mat & Engn, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Mat & Related Technol, Minist Educ, Shanghai 200237, Peoples R China

年份：2024

卷号：671

起止页码：692

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20242316189928);WOS:【SCI-EXPANDED(收录号:WOS:001249045700001)】；

基金：Jinxin Wang and Yinze Zuo contributed equally to this work. This work is supported by the National Natural Science Foundation of China (No. U21A2060, No. 22178116), Natural Science Foundation of Shanghai (No. 22ZR1417400), China Postdoctoral Science Foundation (No. 2023 M731084), Shanghai Sailing Program of China (23YF1408900), Fundamental Research Funds for the Central Universities (No. 222201817001, No. 50321041918013, No.JKA01221601) and the Fundamental Research Funds for the Central Universities (JKD01231701). Yongzheng Zhang thanks to the Shanghai Super Post-doctoral Incentive Program. The authors thank the Research Center of Analysis and Test of East China University of Science and Technology for the assistance with the characterization.r (JKD01231701) . Yongzheng Zhang thanks to the Shanghai Super Post-doctoral Incentive Program. The authors thank the Research Center of Analysis and Test of East China University of Science and Technology for the assistance with the characterization.

语种：英文

外文关键词：MXene-based heterostructure; Desolvation kinetics; Low -temperature behaviors; Lithium -sulfur batteries

摘要：Lithium-sulfur (Li-S) batteries exhibit superior theoretical capacity and energy density but are still hindered by the sluggish redox conversion kinetic of lithium polysulfides arising from the significant desolvation barrier, especially under high current density or low-temperature environments. Herein, a two-dimensional (2D) porous graphitic phase carbon nitride/MXene (CN-MX) heterostructure with intrinsic defects was designed via electrostatic adherence and in-situ thermal polycondensation. In the design, the defect-rich CN with abundant catalytic activity and porous structure could efficiently facilitate the lithium polysulfides capture, the dissociation of solvated lithium-ion (Li+), and fast Li+ diffusion. Concurrently, 2D MXene nanosheets with high electronic conductivity could act as charge transport channels and provide electrochemical active sites for sulfur redox reactions. The Li -S cells with CN-MX heterostructure modified separator demonstrated uncommon rate perfor- mance (945 mAh/g at 4.0 C) and satisfactory areal capacity (5.5 mAh cm -2 at 0.2 C). Most remarkably, even at 0 degrees C, the assembled Li -S batteries performed favorable cycle stability (91.6% capacity retention after 100 cycles at 0.5 C) and outstanding rate performance (695 mAh/g at 2.0 C), and superior high loading performance (5.1 mAh cm -2 at 0.1 C). This work offers exciting new insights to enable Li -S batteries to operate in extreme environments.