Interfacial adsorption-insertion mechanism induced by phase boundary toward better aqueous Zn-ion battery

作     者：Lutong Shan Yiren Wang Shuquan Liang Boya Tang Yongqiang Yang Ziqing Wang Bingan Lu Jiang Zhou 

作者机构：School of Materials Science and EngineeringCentral South UniversityKey Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceChangshaHunanPeople's Republic of China Department of ChemistryUniversity of ManchesterManchesterUK School of Physics and ElectronicsHunan UniversityChangshaPeople's Republic of China 

出 版 物：《InfoMat》 (信息材料（英文）)

年 卷 期：2021年第3卷第9期

页      面：1028-1036页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:51932011,51802356,51972346 Open Sharing Fund for the Large-scale Instruments and Equipments of Central South University,Grant/Award Number:CSUZC202003 Innovation-Driven Project of Central South University,Grant/Award Number:2020CX024 Program of Youth Talent Support for Hunan Province,Grant/Award Number:2020RC3011 

主　　题：aqueous zinc-ion battery cathode energy storage mechanism phase boundary vanadiumbased materials 

摘      要：Biphasic and multiphasic compounds have been well clarified to achieve extraordinary electrochemical properties as advanced energy storage *** the role of phase boundaries in improving the performance is remained to be ***,we reported the biphasic vanadate,that is,Na_(1.2)V_(3)O_(8)/K_(2)V_(6)O_(16)·1.5H_(2)O(designated as Na0.5K0.5VO),and detected the novel interfacial adsorption-insertion mechanism induced by phase *** calculations indicated that large amount of Zn^(2+)and H^(+)ions would be absorbed by the phase boundaries and most of them would insert into the host structure,which not only promote the specific capacity,but also effectively reduce diffusion energy barrier toward faster reaction *** by this advanced interfacial adsorption-insertion mechanism,the aqueous Zn/Na_(0.5)K_(0.5)VO is able to perform excellent rate capability as well as long-term cycling performance.A stable capacity of 267 mA h g^(-1)after 800 cycles at 5 A g^(-1)can be *** discovery of this mechanism is beneficial to understand the performance enhancement mechanism of biphasic and multiphasic compounds as well as pave pathway for the strategic design of highperformance energy storage materials.