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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Transformed Akhtenskite MnO2 from Mn3O4 as Cathode for a Rechargeable Aqueous Zinc Ion Battery
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Transformed Akhtenskite MnO2 from Mn3O4 as Cathode for a Rechargeable Aqueous Zinc Ion Battery

机译：从Mn3O4转化为可充电水性锌离子电池的阴极的Akhtenskite mnO2

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摘要

Low cost, safety, and environmental benignity make rechargeable aqueous Zn/MnO2 batteries promising candidates for large-scale energy storage. However, the synthesis of MnO2 with excellent electrochemical performance is limited to the traditional hydrothermal method, which is difficult to scale up for mass production. Herein, a ball milling approach is developed to rapidly obtain Mn3O4 nanoparticles in large quantity. As the cathode material of aqueous zinc ion battery, Mn3O4 gradually transforms to epsilon-MnO2 in 1 M ZnSO4 + 1 M MnSO4 aqueous electrolyte with increasing cycles. Benefiting from the unexpected phase transition from Mn3O4 to epsilon-MnO2, the cathode delivers a specific capacity of 221 mAh g(-1) at a current density of 100 mA g(-1) and a good long-term cyclic stability over 500 cycles with 92% capacity retention at a high rate of 500 mA g(-1). The excellent battery performance combined with the cost-effective preparation procedure, the good safety of aqueous mild electrolyte, and the easy cell assembly are believed to promote the practical use of the Zn/MnO2 battery in large-scale energy storage.
机译：成本低，安全和环境良性使可充电Zn / MnO2电池为大型储能的候选人提供充电的Zn / MnO2电池。然而，具有优异的电化学性能的MnO 2的合成仅限于传统的水热方法，这难以扩大批量生产。这里，开发了球磨方法以大量地快速获得Mn3O4纳米颗粒。作为锌离子电池水溶液的阴极材料，Mn3O4随着循环的增加，Mn3O4逐渐转化为1M ZnSO 4 + 1M MnSO4水性电解质中的ePsilon-MnO 2。受益于从Mn3O4到epsilon-mnO2的意外相转变，阴极以100mA g（-1）的电流密度为221mAhg（-1）的特定容量，并且在500循环中具有良好的长期环状稳定性92％的容量保留为500 mA g（-1）。优异的电池性能与经济高效的制备程序相结合，含水水解电解质的良好安全性，以及易于电池组件的良好安全性，以促进Zn / MnO2电池在大规模储存中的实际应用。

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