文献类型：期刊文献

英文题名：S-vacancies manipulating enhances Na+ insertion of MoS2 for efficient sodium-ion storage

作者：Ma, Xiaoxiang[1] Diao, Lipeng[1] Wang, Yanru[1] Zhang, Lijie[1] Lu, Yun[2] Li, Daohao[1] Yang, Dongjiang[1] She, Xilin[1]

第一作者：Ma, Xiaoxiang

通信作者：Li, DH[1];She, XL[1]

机构：[1]Qingdao Univ, Coll Mat Sci & Engn, Sch Environm Sci & Engn, State Key Lab Biofibers & Ecotext, Qingdao 266071, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2023

卷号：457

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20230113335230);Scopus(收录号：2-s2.0-85145307096);WOS:【SCI-EXPANDED(收录号:WOS:000920726100001)】；

基金：The authors are grateful for the financial support by the National Natural Science Foundation of China (No. 31870535) , the Natural Science Foundation of Shandong Province (No. ZR2022QB023) , the Taishan Scholars Program (No. ts201712030) , Shandong Provincial Natural Science Foundation of (Nos. ZR2021QB022, ZR2021ME012) , the Qingchuang Talents Induction Program of Shandong Higher Edu-cation Institution (Research and Innovation Team of Marine Polysaccharides Fibers-based Energy Materials) , and the State Key Laboratory of Bio-Fibers and EcoTextiles, Qingdao University.

语种：英文

外文关键词：Molybdenum disulfide (MoS2); Vacancy engineering; S-vacancies; Na+ insertion; Sodium-ion battery

摘要：Molybdenum disulfide (MoS2) has received great interest as an anode material for sodium-ion batteries (SIBs) because of its appealing theoretical capacity. However, its low reaction kinetics and poor cycling stability severely hinder its widespread application. Herein, we outline a simple method for fabricating a series of ultrathin MoS2/carbon composites with different S-vacancy concentrations as efficient anodes for SIBs. The sample with an optimized S-vacancy concentration showed remarkable rate performance (276 mAh/g at a current density of 5 A/g) and high reversible capacity with exceptional stability (473 mAh/g at 1 A/g after 100 cycles). The Na+ storage kinetics results, combined with theoretical calculations, suggested that a 12.5 similar to 18.75 % S-vacancy concentration (corresponding to S atoms) in MoS2 can greatly promote Na+ insertion and alleviate structural changes, thus enhancing the reversible capacity, reaction kinetics, and stability of the anode.