Theoretical evaluation of pristine, single B- and N-doped, and BN co-doped graphenylene as metal-free cathode catalysts for nonaqueous Li–O 2 batteries

BN co-doped GP, with low ORR/OER overpotentials, favorable Li 4 O 4 formation, fast kinetics, and reduced Li 2 CO 3 formation, is a stable, metal-free, environmentally benign bifunctional cathode electrocatalyst for rechargeable non-aqueous Li–O 2 batteries