Controlled growth of SnO 2@Fe 2O 3 double-sided nanocombs as anodes for lithium-ion batteries

Abstract

A novel heterostructure is developed by grafting 1D SnO 2 nanorods onto both sides of pre-grown 2D Fe 2O 3 nanoflakes, forming a comb-like rather than tree-like branched nanostructure. The SnO 2 nanorod branches are determined to grow along the [001] direction on the (±001) planes of Fe 2O 3 nanoflakes. The resulting SnO 2@Fe 2O 3 nanocombs show stabilized cycling performance and improved volumetric energy density compared to pristine Fe 2O 3 nanoflakes presumably due to the integration of SnO 2 branches as well as the 3D hierarchical structural features. This journal is © 2012 The Royal Society of Chemistry.