Lithiated interface of Pt/TiO2 enables an efficient wire-shaped Zn–Air solar micro-battery

Abstract

We report a wire-shaped bifunctional oxygen photoelectrode by integrating Li-doped TiO₂ nanotubes and Pt nanoclusters. Conductive nanoshells have been identified at the lithiated interface of Pt/TiO₂, which facilitates the performance of oxygen catalysis. Thus, the assembled Zn–air micro-battery with solar-assisted charging greatly improves the voltage efficiency compared with the conventional state-of-the-art catalyst as the air electrode.