文献类型：期刊文献

英文题名：Controllable Sulfurization of MXenes to In-Plane Multi-Heterostructures for Efficient Sulfur Redox Kinetics

作者：Li, Xiang[1];Zuo, Yinze[2];Zhang, Yongzheng[1];Wang, Jian[3,4,5];Wang, Yanli[1];Yu, Huimei[1];Zhan, Liang[1];Ling, Licheng[1];Du, Zhiguo[6];Yang, Shubin[6]

机构：[1]East China Univ Sci & Technol, State Key Lab Green Chem Engn & Ind Catalysis, Key Lab Specially Funct Polymer Mat Related Techno, Shanghai Key Lab Multiphase Mat Chem Engn,State Ke, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Fuzhou Univ, Sch Mat Sci & Engn, Fuzhou 350108, Fujian, Peoples R China;[3]Chinese Acad Sci, Suzhou Inst Nanotech & Nanob, I Lab, Suzhou 215123, Peoples R China;[4]Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, CAS Key Lab Nanophoton Mat & Devices, Suzhou 215123, Peoples R China;[5]Helmholtz Inst Ulm HIU, D-89081 Ulm, Germany;[6]Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

年份：2024

卷号：14

期号：9

外文期刊名：ADVANCED ENERGY MATERIALS

收录：;EI(收录号：20240115324719);WOS:【SCI-EXPANDED(收录号:WOS:001134852800001)】；

基金：X.L. and Y.Z. contributed equally to this work. This work was financially supported by the National Natural Science Foundation of China (No. 22075081, 52372045, 52072014, 52202204 and U1710252), the Fundamental Research Funds for the Central Universities (JKD01231701), China Postdoctoral Science Foundation (No. 2023M731084), Shanghai Sailing Program of China (23YF1408900). Y.Z.Z. thanks the Shanghai Super Postdoctoral Incentive Program. The authors thank the Reserch Center of Analysis and Test of East China University of Science and Technology for the assistance with thecharacterization. We also thank the support from Nano-X, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences.

语种：英文

外文关键词：in-plane heterostructures; lithium-sulfur batteries; MXenes; sulfurization; transition metal sulfides

摘要：Although in-plane heterostructure with high ion transport pathway and unique interfacial atomic structure offers endless possibilities in the catalysis field, it is still challenging to directly synthesize MXene-based in-plane heterostructure due to the differences in crystal structures and growth conditions. Here, Mo2C-MoS2 in-plane multi-heterostructures are synthesized by topological conversion of sandwich-like mesoporous Mo2C-SiO2 layers in sulfur vapor and subsequent removal of SiO2. During the conversion process, the exposed Mo2C will efficiently converted to 2H phase MoS2, meanwhile, the covered Mo2C remained stable, affording metallic Mo2C MXene and semiconducting MoS2 in-plane multi-heterostructures compatible in one layer. The resultant Mo2C-MoS2 layer has multiple heterointerfaces, build-in electric fields as well as abundant defects. Such structural features enable to improve of the electrochemical active surface area (16.4 mF cm-2), which not only facilitates the bidirectional sulfur electrochemistry between solid Li2S and soluble lithium polysulfides, but also enhances the transfer kinetics of electrons and ions, giving rise to a high-rate performance (642 mAh g-1 at 5 C) and a long-term cycle life (1000 cycles at 5 C) in lithium-sulfur batteries. Mo2C-MoS2 in-plane multi-heterostructures are synthesized by topological conversion of sandwich-like mesoporous Mo2C-SiO2 layers in sulfur vapor and subsequent removal of SiO2, affording metallic Mo2C MXene and semiconducting MoS2 compatible in one layer. The resultant Mo2C-MoS2 layer has multiple heterointerfaces, build-in electric fields as well as abundant defects, showing increased active sites for sulfur conversion and delivering a high-rate performance (642 mAh g-1 at 5 C) and a long-term cycle life (1000 cycles at 5 C) in lithium-sulfur batteries.image