High performance lithium oxygen batteries based on a phosphorous‐doped holey graphene cathode
Ying Meng, Jiakui Zhang, Haiying Lu, Xianghong Chen, Jiantie Xu
Abstract
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 .