Research on zinc-ion batteries (ZIBs) with manganese-based cathodes has been severely hindered by their poor cycle stability. This study explores the fundamental parameters that affect the cycle stability of battery systems from a structural stability perspective. MnO₂ electrodes with different classical morphologies and sizes were synthesized via a temperature-controlled coprecipitation strategy. The effects of the morphology and size of the MnO₂ on the overall electrical properties and kinetics of ZIBs were analyzed and compared. The one-dimensional nanofibrous α-MnO₂ produced using this method exhibited the most stable nanostructure with a favorable aspect ratio, which resulted in faster chemical kinetics. A more uniform particle distribution and better aspect ratios not only enabled a faster ion migration rate but also affected the remolding of the anode morphology. After 2000 cycles at a high current density of 1 A g^–1, the material maintained an excellent discharge-specific capacity, highlighting it as a promising electrode material for ZIBs. The construction of nanoenergy materials with controllable morphologies and sizes will significantly advance battery applications.

中文翻译：

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MnO2 形态对锌离子电池动力学和稳定性的影响

锰基正极锌离子电池 (ZIB) 的循环稳定性差，严重阻碍了其研究。本研究从结构稳定性的角度探讨了影响电池系统循环稳定性的基本参数。通过温控共沉淀策略合成了具有不同经典形貌和尺寸的MnO _2电极。分析和比较了MnO _{2的形貌和尺寸对 ZIB 的整体电学性质和动力学的影响。}一维纳米纤维状α-MnO ₂使用这种方法生产的纳米结构表现出最稳定的纳米结构和有利的纵横比，从而导致更快的化学动力学。更均匀的颗粒分布和更好的纵横比不仅可以实现更快的离子迁移速率，还可以影响阳极形态的重塑。^{在 1 A g –1}的高电流密度下循环 2000 次后，该材料保持了出色的放电比容量，突出表明它是一种很有前途的 ZIB 电极材料。构建具有可控形态和尺寸的纳米能源材料将显着推进电池应用。