Isolated diatomic Zn-Co metal–nitrogen/oxygen sites with synergistic effect on fast catalytic kinetics of sulfur species in Li-S battery

作     者：Chun-Lei Song Qiao-Tong He Zhongyi Zeng Jing-Yan Chen Tian Wen Yu-Xiao Huang Liu-Chun Zhuang Wei Yi Yue-Peng Cai Xu-Jia Hong Chun-Lei Song;Qiao-Tong He;Zhongyi Zeng;Jing-Yan Chen;Tian Wen;Yu-Xiao Huang;Liu-Chun Zhuang;Wei Yi;Yue-Peng Cai;Xu-Jia Hong

作者机构：School of ChemistrySouth China Normal UniversityGuangzhou 510006GuangdongChina Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target&Clinical Pharmacologythe NMPA and State Key Laboratory of Respiratory DiseaseSchool of Pharmaceutical Sciences&the Fifth Affiliated Hospital Guangzhou Medical UniversityGuangzhou 511436GuangdongChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2023年第79卷第4期

页      面：505-514页

核心收录：

学科分类：0710[理学-生物学] 0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of P.R.China(22001082) the Applied Science and Technology Planning Project of Guangdong Province,Guangzhou,China(2017B090917002) the Guangdong Basic and Applied Basic Research Fund Project(2019B1515120027) the Research and Development(R&D)Projects in Key Areas of Guangdong Province(2020B0101028005) the Guangdong Natural Science Foundation Project(No.2019A1515010841) the Guangdong Province International Science and Technology Cooperation Project(No.2019A050510038) the Guangzhou Science and Technology Association Young Talents Promotion Project(X20210201043) the Guangzhou Basic and Applied Basic Research Project(202102020624)。 

主　　题：Dual-core single-atom catalysts Lithium polysulfides Fast catalytic kinetics Li_(2)S diffusion Li-S battery 

摘      要：Lithium-sulfur batteries are severely restricted by low electronic conductivity of sulfur and Li_(2)S,shuttle effect,and slow conversion reaction of lithium polysulfides(LiPSs).Herein,we report a facile and highyield strategy for synthesizing dual-core single-atom catalyst(ZnCoN_(4)O_(2)/CN)with atomically dispersed nitrogen/oxygen-coordinated Zn-Co sites on carbon nanosheets.Based on density functional theory(DFT)calculations and LiPSs conversion catalytic ability,ZnCoN_(4)O_(2)/CN provides dual-atom sites of Zn and Co,which could facilitate Li^(+)transport and Li_(2)S diffusion,and catalyze LiPSs conversion more effectively than homonuclear bimetallic single-atom catalysts or their simple mixture and previously reported singleatom catalysts.Li-S cell with ZnCoN_(4)O_(2)/CN modified separator showed excellent rate performance(789.4 mA h g^(-1)at 5 C)and stable long cycle performance(0.05%capacity decay rate at 6C with 1000cycles,outperforming currently reported single atomic catalysts for LiPSs conversion.This work highlights the important role of metal active centers and provides a strategy for producing multifunctional dual-core single atom catalysts for high-performance Li-S cells.