文献类型：期刊文献

英文题名：g-C3N4-MoS2/VS2 heterostructured interfaces with built-in electric fields for enhanced polysulfide conversion in lithium-sulfur batteries

作者：Lin, Fangmin[1];Wang, Jun[1];Zhang, Yongzheng[5];Gong, Qiaohui[1];Pang, Xinlu[1];Duan, Yidan[1];Wang, Jitong[1,2];Ma, Cheng[4];Ling, Licheng[3]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]Guangxi Univ, Univ Engn Res Ctr Green Chem New Mat, Sch Chem & Chem Engn, Nanning 530004, Guangxi, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[5]Nantong Univ, Sch Text & Clothing, Nantong 226019, Peoples R China

年份：2026

卷号：532

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20260920177199);WOS:【SCI-EXPANDED(收录号:WOS:001706043100001)】；

基金：This work is financially supported by the National Natural Science Foundation of China (Nos. U21A2060 and 22178116) and the Funda-mental Research Funds for the Central Universities (No. JKD01251701) .

语种：英文

外文关键词：Lithium;sulfur batteries; Ternary; Heterostructure

摘要：Lithium-sulfur (Li-S) batteries are regarded as promising candidates for next-generation high-energy storage systems due to their superior theoretical capacity. However, their commercial application is severely constrained by the polysulfide shuttle effect and slow reaction kinetics. This study synthesized a g-C3N4-based heterostructured separator modification material, g-C3N4-MoS2/VS2 (MoVSCN), via a two-step hydrothermal method. The material not only facilitates spontaneous electron redistribution at the ternary interfaces, forming an internal electric field and abundant defect sites for effective adsorption and catalysis of polysulfides, but also achieves a synergistic optimization of electron and ion transport pathways, thereby significantly enhancing the overall reaction kinetics and cycling stability of lithium-sulfur batteries. Electrochemical testing indicates that the modified battery exhibits high capacity (1353 mAh g-1 during initial discharge at 0.2 C), excellent rate performance (721 mAh g-1 at 5 C), and exceptionally long lifespan (capacity decay rate of only 0.048% after 1000 cycles at 1 C). Even under low-temperature conditions (0 degrees C), the battery maintains a high specific capacity of 1160.7 mAh g-1 and an impressive capacity retention of 83.6%. The morphology of the lithium anode after cycling demonstrates its ability to nearly completely suppress the shuttle effect. These findings lay a solid foundation for pioneering advances in ternary composite materials and heterostructure interface engineering.