Rational construction of Ag@MIL-88B(V)-derived hierarchical porous Ag-V_(2)O_(5) heterostructures with enhanced diffusion kinetics and cycling stability for aqueous zinc-ion batteries

作     者：Yibo Zhang Zhihua Li Liangjun Gong Xuyu Wang Peng Hu Jun Liu Yibo Zhang;Zhihua Li;Liangjun Gong;Xuyu Wang;Peng Hu;Jun Liu

作者机构：School of Materials Science and EngineeringCentral South UniversityChangsha 410083HunanChina Key Laboratory of Nonferrous Metal Materials Science and Engineering of Ministry of EducationCentral South UniversityChangsha 410083HunanChina School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina Fine Chemical Industry Research InstituteSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275GuangdongChina 

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

年 卷 期：2023年第77卷第2期

页      面：561-571,I0015页

核心收录：

学科分类：081704[工学-应用化学] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the China Academy of Space Technology Innovation fund(2017ZY601026) 

主　　题：Aqueous zinc-ion batteries Metal-organic frameworks V_(2)O_(5) Heterostructures Nano silver 

摘      要：With the advantages of the multiple oxidation states and highly open crystal structures,vanadium-based composites have been considered as the promising cathode materials for aqueous zinc-ion batteries(ZIBs).However,the inherent inferior electrical conductivity,low specific surface area,and sluggish Zn^(2+)diffusion kinetics of the traditional vanadium-based oxides have greatly impeded their ***,a novel hierarchical porous spindle-shaped Ag-V_(2)O_(5) with unique heterostructures was rationally designed via a simple MOF-assisted synthetic method and applied as stable cathode for aqueous *** high specific surface area and hierarchically porous superstructures endowed Ag-V_(2)O_(5) with sufficient electrochemical active sites and shortened the diffusion pathways of Zn^(2+),which was beneficial to accelerate the reversible transport of Zn^(2+)and deliver a high specific capacity(426 mA h g^(-1) at 0.1 A g^(-1) and 96.5%capacity retention after 100 cycles).Meanwhile,the self-built-in electric fields at the heterointerface of Ag-V_(2)O_(5) electrode could strengthen the synergistic coupling interaction between Ag and V_(2)O_(5),which can effectively enhance the electric conductivity and maintain the structural integrity,resulting in superb rate capability(326.1 mA h g^(-1) at 5.0 A g^(-1))and remarkable cycling stability(89.7%capacity retention after 2000 cycles at 5.0 A g^(-1)).Moreover,the reversible Zn^(2+)storage mechanism was further investigated and elucidated by kinetics analysis and DFT calculations.