Enhanced sodium storage via the hetero-interface effect in BiOCl/TiO2 p–n junctions

Abstract

This work introduces a new alternative way to improve the sodium storage of TiO₂, which can play a joint role in common techniques like carbon coating and heteroatom doping. The hetero-interface between BiOCl and TiO₂ provides extra sodium storage sites and more importantly, a built-in electric field accelerates electron and ion diffusion.