Hierarchical WO3@SnO2 core–shell nanowire arrays on carbon cloth: a new class of anode for high-performance lithium-ion batteries

Abstract

We report a facile, two-step hydrothermal method to synthesize a WO₃@SnO₂/carbon cloth heterostructure. Hybrid nanowire array/carbon cloth electrodes exhibit a high reversible capacity of 1000 mA h g⁻¹ after 200 cycles at a current density of 0.28 C, much higher than that of pristine WO₃ nanostructures, and enhanced rate capability at current densities ranging from 0.28 to 5 C. The superior electrochemical performance of the composite nanostructures can be ascribed to the incorporation of SnO₂, which decreases the overall battery internal resistance and improves the conductivity of the composite electrodes.