Revealing alkali metal ions transport mechanism in the atomic channels of Au@a-MnO_(2)

作     者：Jingzhao Chen Yong Su Hongjun Ye Yushu Tang Jitong Yan Zhiying Gao Dingding Zhu Jingming Yao Xuedong Zhang Tingting Yang Baiyu Guo Hui Li Qiushi Dai Yali Liang Jun Ma Bo Wang Haiming Sun Qiunan Liu Jing Wang Congcong Du Liqiang Zhang Yongfu Tang Jianyu Huang Jingzhao Chen;Yong Su;Hongjun Ye;Yushu Tang;Jitong Yan;Zhiying Gao;Dingding Zhu;Jingming Yao;Xuedong Zhang;Tingting Yang;Baiyu Guo;Hui Li;Qiushi Dai;Yali Liang;Jun Ma;Bo Wang;Haiming Sun;Qiunan Liu;Jing Wang;Congcong Du;Liqiang Zhang;Yongfu Tang;Jianyu Huang

作者机构：Clean Nano Energy CenterState Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004HebeiChina School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105HunanChina Hebei Key Laboratory of Applied ChemistryCollege of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004HebeiChina 

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

年 卷 期：2023年第82卷第7期

页      面：350-358,I0008页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0808[工学-电气工程] 07[理学] 0817[工学-化学工程与技术] 08[工学] 070205[理学-凝聚态物理] 0807[工学-动力工程及工程热物理] 080501[工学-材料物理与化学] 0827[工学-核科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China(22279112,52022088,51971245,51772262,21406191,U20A20336,21935009) the Natural Science Foundation of Hebei Province,China(B2022203018,F2021203097,B2020203037,B2018203297) the Hunan Innovation Team,China(2018RS3091) the Beijing Natural Science Foundation,China(2202046) the Fok Ying-Tong Education Foundation of China(171064) 

主　　题：Ion transport In-situ TEM STEM Metal oxygen batteries Metal ion batteries 

摘      要：Understanding alkali metal ions’(e.g.,Li^(+)/Na^(+)/K^(+))transport mechanism is challenging but critical to improving the performance of alkali metal *** using a-MnO_(2)nanowires as cathodes,the transport kinetics of Li^(+)/Na^(+)/K^(+)in the 2×2 channels of a-MnO_(2)with a growth direction of[001]is *** show that ion radius plays a decisive role in determining the ion transport and *** of the ion radii,Li^(+)/Na^(+)/K^(+)can all go through the 2×2 channels of a-MnO_(2),generating large stress and causing channel merging or ***,smaller ions such as Li^(+)and Na^(+)cannot only transport along the[001]direction but also migrate along thedirection to the nanowire surface;for large ion such as K^(+),diffusion along thedirection is *** different ion transport behavior has grand consequences in the electrochemistry of metal oxygen batteries(MOBs).For Li-O_(2)battery,Li^(+)transports uniformly to the nanowire surface,forming a uniform layer of oxide;Na^(+)also transports to the nanowire surface but may be clogged locally due to its larger radius,therefore sporadic pearl-like oxides form on the nanowire surface;K^(+)cannot transport to the nanowire surface due to its large radius,instead,it breaks the nanowire locally,causing local deposition of potassium *** study provides atomic scale understanding of the alkali metal ion transport mechanism which may be harnessed to improve the performance of MOBs.