ZnMn_(3)O_(7):A New Layered Cathode Material for Fast-Charging Zinc-Ion Batteries

作     者：Ruitao Sun Qin Liu Wenzhuo Deng Ruitao Sun;Qin Liu;Wenzhuo Deng

作者机构：CAS Key Laboratory of Design and Assembly of Functional Nanostructuresand Fujian Key Laboratory of NanomaterialsState Key Laboratory of Structural ChemistryFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of SciencesBeijing 100039China 

出 版 物：《Chinese Journal of Structural Chemistry》 (结构化学（英文）)

年 卷 期：2022年第41卷第5期

页      面：85-92页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the Fujian Science and Technology Key Project(No.2021H0042) 

主　　题：layered structure zinc-manganese oxide cathode zinc-ion battery 

摘      要：Low-cost and high-energy-density manganese-based compounds are promising cathode materials for rechargeable aqueous zinc-ion batteries(AZIBs),however,they often experience cycling instability issues and inferior rate ***,we report a new layered manganese-based cathode material,ZnMn_(3)O_(7)(ZMO),which possesses a large interlayer spacing of 4.8Åand allows the intercalation of~1.23 Zn-ions per formula unit(corresponding to a capacity of~170 mAh/g).Importantly,ZMO exhibits good cycling stability(72.9%capacity retention over 400 cycles),ultrafast-charging capability(73%state of charge in 1.5 min),and an ultrahigh power density(3510 W/kg at 88 Wh/kg).Through kinetic characterization,the favorable diffusion of ions and the dominant capacitor contribution are found to be conducive to the achievement of superior fast charging ***,the charge storage mechanism is revealed by ex-situ XRD and ex-situ *** work may shed light on the design of high-performance electrode materials for AZIBs.