Elaborate synthesis of black tin oxide–black titanium oxide core–shell nanotubes for ultrastable and fast lithium storage

Abstract

Herein, we report on the elaborate synthesis of a novel hybrid architecture, i.e., black tin oxide–black titanium oxide core–shell nanotubes (denoted as TiO_2−x@SnO_2−x nanotubes) by NaBH₄ co-reduction. The synergistic interplay between the SnO_2−x core and the TiO_2−x shell results in superior cyclability and rate capability for ultrastable and fast lithium storage.