Aqueous zinc-ion batteries (ZIBs) have provided new opportunities and challenges to the energy storage market due to their low price, high safety and environmentally friendly. Among the cathode materials of ZIBs, MnO₂ appears to one of the most promising cathode for ZIBs owing to its high theoretical capacitance, abundant reserves, non-toxicity, and low cost. However, the poor cycling stability and rate performance have been the bottle-neck of MnO₂ due to the slow electrochemical kinetics and severe structural damage during cyclic process. Herein, a new strategy is proposed to optimize the cycling stability and rate performance of the pristine MnO₂ by a simple surface modification of manganese hexacyanoferrate (MnHCF). The anchored MnHCFs not only relieves the manganese dissolution during the continuous charge and discharge, but also introduces oxygen defects boosting the electrochemical kinetics of MnO₂. The as prepared composite delivers a reversible specific capacity of 287 mA h g⁻¹ at 0.1 A g⁻¹ and maintains 87.1% of its initial capacity after 70 cycles.

水系锌离子电池（ZIBs）因其价格低廉、安全性高、环境友好等特点，给储能市场带来了新的机遇和挑战。在ZIBs的正极材料中，MnO ₂因其理论电容高、储量丰富、无毒、成本低等优点而成为ZIBs最有前景的正极材料之一。然而，由于缓慢的电化学动力学和循环过程中严重的结构损伤，较差的循环稳定性和倍率性能一直是MnO ₂的瓶颈。_{在此，提出了一种优化原始MnO 2}的循环稳定性和倍率性能的新策略。通过对六氰合铁酸锰 (MnHCF) 进行简单的表面改性。锚定的 MnHCFs 不仅缓解了连续充放电过程中锰的溶解，而且还引入了氧缺陷，从而提高了 MnO ₂的电化学动力学。所制备的复合材料在 0.1 A g ^-1下提供 287 mAh g ^-1的可逆比容量，并在 70 次循环后保持其初始容量的 87.1%。