From charge storage mechanism to performance:A strategy toward boosted lithium/sodium storage through heterostructure optimization

作     者：Xiaoke Zhang Guangfa Deng Mianying Huang Zhaohui Xu Jianlin Huang Xuan Xu Zhiguang Xu Maochan Li Lei Hu Xiaoming Lin Xiaoke Zhang;Guangfa Deng;Mianying Huang;Zhaohui Xu;Jianlin Huang;Xuan Xu;Zhiguang Xu;Maochan Li;Lei Hu;Xiaoming Lin

作者机构：Key Laboratory of Theoretical Chemistry of EnvironmentMinistry of EducationSchool of ChemistrySouth China Normal UniversityGuangzhou 510006GuangdongChina Anhui Laboratory of Functional Coordinated Complexes for Materials Chemistry and ApplicationSchool of Chemical and Environmental EngineeringAnhui Polytechnic UniversityWuhu 241000AnhuiChina National Engineering Research Center for Carbohydrate SynthesisKey Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of EducationJiangxi Normal UniversityNanchang 330022JiangxiChina 

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

年 卷 期：2024年第88卷第1期

页      面：112-124,I0003页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：financially supported by the Open Fund of Energy and Materials Chemistry Joint Laboratory of SCNU and TINCI China (SCNU-TINCI-202207) 

主　　题：Metal-organic framework Heterostructure Lithium-ion batteries Sodium-ion batteries DFT calculation 

摘      要：Solving the problems of low electrical conductivity and poor cycling durability in transition metal oxidesbased anode materials for lithium-ion batteries(LIBs)and sodium-ion batteries(SIBs)has already turned into an urgent *** this paper,we successfully synthesized Co_(2)VO_(4)/Co compounds with Co-VMOF(metal-organic framework)as a sacrificial template and investigated their electrochemical mechanism in order to improve the electrochemical properties of LIBs and *** optimized heaping configuration and the existence of metallic Co catalyzed the formation of radical ions,thereby facilitating higher conductivity,shortening Li+and Na+transport paths,and providing more active ***_(2)VO_(4)/Co constructed with 2-methylimidazole as a ligand showed a discharge capacity of 1605.1 mA h g^(-1)after 300 cycles at 0.1 A g^(-1)in LIB and 677.2 mA h g^(-1)in *** functional theory(DFT)calculation emphasizes the crucial role of Co_(2)VO_(4)/Co in enhancing electrode conductivity,decreasing the migratory energy barrier,and thereby strengthening electrochemical *** heterostructure building technique may pave the way for the development of high-performance LIBs and ***,the problem of the low first-loop coulombic efficiency faced by transition metal oxides is improved.