Promoting Proton Migration Kinetics by Ni^(2+)Regulating Enables Improved Aqueous Zn-MnO_(2) Batteries  

作　　者：Jie Ji Jia Yao Yongchang Xu Houzhao Wan Bao Zhang Lin Lv Jingying Li Nengze Wang Zhaohan Zheng Jun Zhang Guokun Ma Li Tao Hanbin Wang Yi Wang Hao Wang 

机构地区：[1]Hubei Yangtze Memory Laboratories,Wuhan 430205,China School of Microelectronics,Hubei University,Wuhan 430062,China [2]School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China [3]Center for Microscopy and Analysis,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

出　　处：《Energy & Environmental Materials》2023年第2期252-261,共10页能源与环境材料（英文）

基　　金：supported by the National Natural Science Foundation of China(No.52002122);the Science and Technology Department of Hubei Province(No.2019AAA038);the Project funded by China Postdoctoral Science Foundation(No.2021M690947);the Wuhan Yellow Crane Talent Program(No.2017-02).

摘　　要：The energy storage behaviors of MnO_(2) for aqueous Zn-MnO_(2) batteries mainly depend on the Zn^(2+)/H^(+)intercalation but are limited by poor ion/electron migration dynamics and stability.Herein,a strategy is proposed that promoting proton migration kinetics ameliorates H^(+)storage activity by introducing Ni^(2+)intoγ-MnO_(2)(Ni-MnO_(2)).Ni^(2+)can lower the diffusion barrier of H^(+)and selectively induce the ion intercalation,thereby alleviating the electrostatic interaction with the lattice.Moreover,Ni^(2+)enables the adjacent[MnO6]octahedrons to have better electron conductivity.The Ni-MnO_(2) exhibits superior rate performance(nearly four times specific capacity compared with MnO_(2))and ultra-long-cycle stability(100%of capacity retention after 11000 cycles at 3.0 A g^(-1)).The calculation indicates that the Ni-MnO_(2) allows H^(+)migrate rapidly along the one-dimensional tunnel due to reduction of the activation energy caused by Ni^(2+)regulating,thus achieving excellent reaction kinetics.This work brings great potential for the development of high-performance aqueous Zn-MnO_(2) batteries.

关 键 词：DOPING H^(+)storage ion/electron transport proton migration Zinc ion battery 

分 类 号：TM912[电气工程—电力电子与电力传动]