Aqueous zinc-ion batteries, especially Zn-MnO₂ battery, have attracted intensive attention owing to their unique features of high capacity, environmental friendliness, and safety. However, the problem of Mn dissolution hinders the development of zinc-ion batteries with long-term usage and high-rate performance. In this work, a novel preparation method for the polyaniline (PANI)-coated composite aerogel of MnO₂ and rGO (MnO₂/rGO/PANI) electrode is reported. The obtained composite possesses high electrical conductivity, and also effectively suppresses the dissolution of Mn. The fabricated MnO₂/rGO/PANI//Zn battery exhibits a high capacity of 241.1 mAh·g⁻¹ at 0.1 A·g⁻¹, and an excellent capacity retention of 82.7% after 600 charge/discharge cycles. In addition, the rapid diffusion coefficient of the MnO₂/rGO/PANI electrode was further examined by galvanostatic intermittent titration technique. This work provides new insights into the development of high-performance Zn-MnO₂ battery with a better understanding of its diffusion kinetics.

水性锌离子电池，特别是Zn-MnO ₂电池，由于其具有高容量，环境友好和安全的独特特征而引起了广泛的关注。但是，Mn的溶解问题阻碍了长期使用且性能高的锌离子电池的开发。在这项工作中，报道了一种新型的制备聚苯胺（PANI）的MnO ₂和rGO（MnO ₂ / rGO / PANI）电极复合气凝胶的制备方法。所获得的复合材料具有高电导率，并且还有效地抑制了Mn的溶解。制成的MnO ₂ / rGO / PANI // Zn电池在0.1 A·g ^-1时表现出241.1 mAh·g ^-1的高容量，经过600次充电/放电循环后，其出色的容量保持率为82.7％。另外，通过恒电流间歇滴定技术进一步检查了MnO ₂ / rGO / PANI电极的快速扩散系数。这项工作通过更好地了解其扩散动力学，为开发高性能Zn-MnO ₂电池提供了新的见解。