阴极
材料科学
电化学
锰
化学工程
扩散
水溶液
相(物质)
耐久性
动力学
Crystal(编程语言)
离子
电化学动力学
电极
无机化学
冶金
复合材料
化学
物理化学
热力学
有机化学
工程类
物理
程序设计语言
量子力学
计算机科学
作者
Yuxin Gao,Jiang Zhou,Liping Qin,Zhenming Xu,Zhexuan Liu,Liangbing Wang,Xinxin Cao,Guozhao Fang,Shuquan Liang
标识
DOI:10.1016/j.gee.2022.02.009
摘要
Rapid capacity decay and sluggish reaction kinetics are major barriers hindering the applications of manganese-based cathode materials for aqueous zinc-ion batteries. Herein, the effects of crystal plane on the in-situ transformation behavior and electrochemical performance of manganese-based cathode is discussed. A comprehensive discussion manifests that the exposed (100) crystal plane is beneficial to the phase transformation from tunnel-structured MnO2 to layer-structured ZnMn3O7·3H2O, which plays a critical role for the high reactivity, high capacity, fast diffusion kinetics and long cycling stability. Additionally, a two-stage zinc storage mechanism can be demonstrated, involving continuous activation reaction and phase transition reaction. As expected, it exhibits a high capacity of 275 mAh g−1 at 100 mA g−1, a superior durability over 1000 cycles and good rate capability. This study may open new windows toward developing advanced cathodes for ZIBs, and facilitate the applications of ZIBs in large-scale energy storage system.
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