Graphdiyne Oxide-Based High-Performance Rechargeable Aqueous Zn-MnO2Battery

Designing materials and architectures for improving the performance of rechargeable aqueous Zn-MnO(2)battery has gained extensive interest. The main challenge is to retain high capacity, superior rate performance capability, and long-term stability capacity. This paper describes how a graphdiyne oxide (GDYO) membrane can endow Zn-MnO(2)batteries with high capacity, high rate capability, and long-term stability. The specific capacity of the modified battery reaches as high as 300 mA h g(-1)at a current density of 308 mA g(-1)over 50 cycles. Even at a high current density of 3080 mA g(-1), this Zn-MnO(2)battery exhibits a capacity of 100 mA h g(-1)over 2000 cycles. Moreover, the effect of the GDYO membrane and the reaction mechanism is elucidated. The GDYO membrane allows the reversible stripping/plating of zinc ions to maintain a Coulombic efficiency of approximate to 100% for 800 h. Therefore, it is believed that the GDYO membrane ensures well-aligned ion transport and, thus, stabilizes the electrodes. This feasible approach toward Zn-MnO(2)batteries will open up alternative pathways for fabricating other high-performance Zn-ion batteries.