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Abstract Poor conductivity, sluggish ion diffusion kinetics and short cycle life hinder the further development of manganese oxide in aqueous zinc‐ion batteries (AZIBs). Exploring a cathode with high capacity and long cycle life is critical to the commercial development of AZIBs. Herein, a two‐dimensional (2D) MnO/C composite derived from metal organic framework (MOF) was prepared. The 2D MnO/C cathode exhibits a remarkably cyclic stability with the capacity retention of 90.6% after 900 cycles at 0.5 A·g −1 and maintains a high capacity of 120.2 mAh·g −1 after 4500 cycles at 1.0 A·g −1 . It is demonstrated that MnO is converted into Mn 3 O 4 through electrochemical activation strategy and shows a Zn 2+ and H + co‐intercalation mechanism. In general, this work provides a new path for the development of high‐performance AZIBs cathode with controllable morphology.
Zhu et al. (Mon,) studied this question.