▎ 摘　　要

Li-O-2 batteries are attracting considerable interest due to their outstanding theoretical capacities and energy densities. The liquid electrolyte and insulating nature of discharge products hinder further development. We present a practical strategy for durable Li-O-2 batteries with high cyclable capacity up to 2 mAh/cm(2). A dual polymer gel electrolyte (DPGE) networking strategy is proposed for the quasi-solid electrolyte. Lowering the use of liquid components in the electrolyte would suppress the possible side reaction with superoxide intermediates. The DPGE is further combined with a highly effective Mn-based catalyst that is prepared by direct laser writing on polymers to produce the quasi-solid-state Li-O-2 batteries. The DPGE sustains a highly reversible Li plating/stripping process without short-circuiting or an increase in interfacial resistance for over 2000 h. Furthermore, the Li-O-2 battery demonstrated stable galvanostatic charge/discharge performance for over 200 cycles (2000 h) with a cutoff capacity of 0.4 mAh/cm(2). The battery delivers a high reversible capacity of 2.0 mAh/cm(2) at an elevated current density of 0.4 mA/cm(2), while the charging potential is maintained at a low value. Studies were performed during discharge and charge process to investigate the underlying mechanism. This work could contribute to a better practical design of Li-O-2 batteries.