文献类型：期刊文献

英文题名：2H-VS2/V2C Schottky Heterostructure Modified Separator Utilizes Built-In Electric Field to Synergistically Enhance Polysulfide Trapping and Kinetics of Catalytic Conversion

作者：Wu, Mingyu[1];Li, Qi[2];Wang, Jun[2];Wu, Yinuo[1];Yang, Yiru[1];Yang, Xinyue[1];Zeng, Qinghan[1,3];Wang, Jitong[1,2,3]

机构：[1]Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc Int, Nanning 530004, Guangxi, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[3]Guangxi Univ, Univ Engn Res Ctr Green Chem New Mat, Sch Chem & Chem Engn, Nanning 530004, Guangxi, Peoples R China

年份：2026

卷号：14

期号：11

起止页码：5425

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20261320334661);WOS:【SCI-EXPANDED(收录号:WOS:001712230500001)】；

基金：This work is financially supported by the National Natural Science Foundation of China (No. 22178116).

语种：英文

外文关键词：Built-in electric field; Conversion kinetics; Schottky heterostructure; Shuttle effect; 2H-VS2

摘要：The practical application of lithium-sulfur (Li-S) batteries is severely hampered by the polysulfide shuttle effect and sluggish sulfur redox kinetics. To address these challenges, a Schottky heterostructure catalyst (2H-VS2/V2C) with a built-in electric field (BIEF) was constructed by epitaxially anchoring semiconducting 2H-VS2 nanoflowers onto metallic V2C MXene substrates via a two-step hydrothermal method. This effectively synergizes the strong adsorption capability of V2C with the catalytic activity of 2H-VS2. The BIEF at the heterointerface significantly enhances electron and ion transport as well as accelerates the conversion kinetics of sulfur species. Consequently, Li-S batteries equipped with 2H-VS2/V2C modified separators achieve a specific capacity of 804.2 mAh g(-1) at 5 C, demonstrating an excellent rate capability. Moreover, they exhibit outstanding cycling stability, with a capacity decay rate of only 0.037% per cycle over 1000 cycles at 1 C. Notably, they maintain excellent electrochemical properties even at high sulfur loadings of 4 mg cm(-2) and at 0 degrees C. This work provides an effective interfacial engineering strategy to improve Li-S battery performance and offers guidance for the design of advanced heterostructure catalysts.