Highly hierarchical porous structures constructed from NiO nanosheets act as Li ion and O2 pathways in long cycle life, rechargeable Li–O2 batteries

Abstract

Flower-like NiO with a highly hierarchical porous structure was synthesized and used as a cathode material for Li–O₂ batteries. The disordered porous structure and specific pathways for O₂ and Li ions led to an outstanding cycling performance over 80 cycles at a high current density of 200 mA g⁻¹.