文献类型：期刊文献

英文题名：Single atomic Co decorated mesoporous carbon/MXene heterostructure as redox promoters for high-stable Li-S battery

作者：Bao, Jiaheng[1];Li, Xiang[1];Rong, Tao[1];Wang, Jian[2,3,4,5];Gu, Jianan[6];Cheng, Xiaomin[2,3];Wang, Yanli[1];Lin, Hongzhen[2,3];Cheng, Liang[1];Zhan, Liang[1];Zhang, Yongzheng[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Green Chem Engn & Ind Catalysis, Key Lab Specially Funct Polymer Mat & Related Tech, Shanghai Key Lab Multiphase Mat Chem Engn,Minist E, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, I Lab, Suzhou 215123, Peoples R China;[3]Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, CAS Key Lab Nanophoton Mat & Device, Suzhou 215123, Peoples R China;[4]Helmholtz Inst Ulm HIU, D-89081 Ulm, Germany;[5]Karlsruhe Inst Technol KIT, D-76021 Karlsruhe, Germany;[6]North China Elect Power Univ, Sch New Energy, State Key Lab Alternate Elect Power Syst Renewable, Beijing 100096, Peoples R China

年份：2025

卷号：238

外文期刊名：CARBON

收录：;EI(收录号：20251218063021);WOS:【SCI-EXPANDED(收录号:WOS:001450610100001)】；

基金：Dr. Jian Wang thanks the fellowship support from Alexander von Humboldt Foundation. This work is supported by the funding from the National Natural Science Foundation of China (52372045, 22075081, 22279161, and U1710252) , National Key R & D Program of China (2021YFA1201503) , Shanghai Sailing Program of China (23YF1408900) , Natural Science Foundation of Jiangsu Province (BK. 20210130) , China Postdoctoral Science Foundation (2023M731084) as well as the Opening funding from Key Laboratory of Engineering Dielectrics and Its Application (Harbin University of Science and Technology) (No. KFM202507, Ministry of Education) are acknowledged. The author thanks the scientific 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：MXene; Mesoporous carbon; Single-atom catalyst; Sulfur conversion; Lithium-sulfur batteries

摘要：Lithium-sulfur (Li-S) batteries are considered a potential breakthrough in future energy storage systems owing to remarkable energy density. However, they are fundamentally constrained by practical obstacles including polysulfide shuttle effect and sluggish redox reaction kinetics. To address these challenges, single atomic Co decorated sandwich-like mesoporous carbon/MXene heterostructure (SACo-MC@MX) is designed by using a single-micelle-directed interfacial assembly strategy. This innovative catalytic heterostructure is endowed with combined physical adsorption and chemical anchoring capability toward effectively capturing lithium poly- sulfides, while simultaneously enhancing the redox reaction kinetics of sulfur species through Co atomic catalysis, as fully confirmed by comprehensive electrochemical characterizations and in-situ Raman. The cell employed with SACo-MC@MX achieves an impressive capacity of 1241.6 mAh g- 1 at 0.2C, an excellent rate capability up to 5C, and outstanding long-term cycling stability with a low decay rate of 0.030 % per cycle at 1C over 1000 cycles. Additionally, even with a high sulfur loading of 5.3 mg cm- 2, the cell retains a superior areal capacity of 4.64 mAh cm- 2 after 100 cycles, providing the possibility to commercialize Li-S batteries.