Synthesis and lithium storage performance of Co2SiO4 nanoparticles

Abstract

Herein, a method of synthesizing Co₂SiO₄ at a low temperature of 900 °C is reported. By synthesizing the precursor with a facile hydrothermal method and post-annealing in air at 900 °C, Co₂SiO₄ with good purity was obtained. The Co₂SiO₄ nanoparticles were characterized by XRD, XPS and TEM to analyze their structure and morphology. To evaluate their performance as the anode material for a lithium ion battery, the Co₂SiO₄-based electrodes were investigated by cyclic voltammetry (CV), galvanostatic cycling and a rate test. Such electrodes display superior electrochemical performance, such as providing a large reversible capacity as high as 650 mA h g⁻¹ at a current density of 100 mA g⁻¹ after 100 cycles, demonstrating excellent cyclic performance and good rate capacity.