We report a wire-shaped bifunctional oxygen photoelectrode by integrating Li-doped TiO nanotubes and Pt nanoclusters. Conductive nanoshells have been identified at the lithiated interface of Pt/TiO, 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.
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