材料科学
化学工程
阴极
电导率
扩散
锌
电池(电)
热液循环
水溶液
电极
锰
兴奋剂
氧化物
氧气
无机化学
化学
冶金
光电子学
功率(物理)
有机化学
物理化学
量子力学
热力学
工程类
物理
作者
Mengxian Lin,Fuqiang Shao,Yu Tang,Hongjun Lin,Yanchao Xu,Jing Yang,Jianrong Chen
标识
DOI:10.1016/j.jcis.2021.12.136
摘要
Zinc Manganese oxide (Zn/MnO2)-based aqueous battery is favored due to their high specific capacity, security and cost performance. Nevertheless, they usually problems of unstable cyclic structure and slow diffusion kinetics, restricting their practical application. Here, we have successfully synthesized a Co doped MnO2 cathode material with abundant defects on a carbon cloth substrate. Through a simple hydrothermal method, the Co element can be lightly intercalated in the two-dimensional (2D) layered α-MnO2 nanowires, inhibiting the structural transformation during the cycle and improve the stability of the material. Meanwhile, plasma technology facilitates the formation of oxygen vacancies in the electrode material, which not only accelerate electron diffusion but also improve the conductivity. Therefore, Zn/Co-MnO2 battery can reach a specific capacity of 511 mAh g-1 at 0.5A g-1 and the retention rate accomplish 98% at high current density. This research puts forward a strategy of element doping and physical preparation of oxygen vacancies, which provides the possibility to develop reversible Zn/MnO2-based aqueous battery cathode materials with high-performance.
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