Internal Electric Field and Interfacial Bonding Engineered Step‐Scheme Junction for a Visible‐Light‐Involved Lithium–Oxygen Battery

The internal electric field and interfacial Fe−N bonding in S-scheme Fe2O3/C3N4 significantly boosts the separation and directional migration of photo-excited carriers to establish spatially isolated redox centers. These enable the light-involved Li–O2 battery with a Fe2O3/C3N4 cathode to present an elevated discharge voltage of 3.13 V under illumination and a charge voltage of 3.19 V, as well as superior rate capability and cycling stability.