电导率差,不可逆的结构转变和缓慢的反应动力学限制了MnO2在水系锌离子电池中的应用。采用水热法制备了具有富氧缺陷的α-MnO2电极材料。富氧缺陷的α-MnO2电极优化了电子结构,增加了材料表面活性位点,提高了正极材料的电化学性能。以α-MnO2为正极材料组装的水系锌离子电池在电流密度0.1A/g条件下放电比容量高达210.47mAh/g,容量保持率为122.6%,表现出优异的电化学性能和循环稳定性。
The poor conductivity,irreversible structural transformation and slow reaction kinetics limit the application of MnO2 in aqueous zinc-ion batteries.α-MnO2 electrode materials with oxygen-rich defects were prepared by hydrothermal method.The oxygen-rich defect α-MnO2 electrode optimized the electronic structure,increased the active sites on the surface of the material,and improved the electrochemical performance of the cathode material.The discharge specific capacity of the aqueous zinc-ion battery assembled with α-MnO2 as the cathode material was as high as 210.47mAh/g at a current density of 0.1A/g,and the capacity retention rate was 122.6%,showing excellent electrochemical performance and cycle stability.
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