Uniform gallium oxyhydroxide nanorod anodes with superior lithium-ion storage

Abstract

Exploration of a novel metal oxyhydroxide material provides potential candidates for lithium ion battery (LIB) anodes. In the present work, uniform GaOOH nanorods have been successfully synthesized via a simple hydrothermal method and employed as an anode material for LIBs for the first time. The obtained GaOOH nanorods show a high-purity phase with an average length of ∼1.4 μm and a width of ∼100 nm. As an anode, it delivers a stable capacity of ∼1089 mA h g⁻¹ at a 0.5 A g⁻¹ current density upon 300 cycles and a high rate capacity of ∼639 mA h g⁻¹ at 2 A g⁻¹, where the pseudocapacitance plays a dominant role with a capacity contribution ratio of about 83% at 2.0 mV s⁻¹. This enhanced storage performance can be attributed to a 1D nanostructure with efficient electron and ion transfer as well as strain relaxation upon multiple-cycling.