High performance lithium oxygen batteries based on a phosphorous-doped holey graphene cathode

The sluggish electrochemical kinetics of cathode is one of the critical issues for the development of high performance lithium oxygen batteries (LOBs). Graphene-based materials have attracted great attentions as advanced cathode catalyst for LOBs due to their unique physical and chemical features. The morphology control and heteroatoms-doping have been proven to be efficient ways to modify graphene-based materials with enhanced LOBs performance. Herein, we synthesized a series of holey graphene (hG- x ) with different pore sizes and further introduced phosphorus into hG-2 (P-hG-2). Benefiting from the synergistic effect of holey structures and P doping, the P-hG-2 as cathode for LOBs exhibits the outstanding lithium storage properties with a max discharge capacity of 16546 mAh·g −1 at 100 mA·g −1 and good cycling life of 91 cycles at 1000 mA·g −1 . Graphical Abstract