A novel gelatin-guided mesoporous bowknot-like Co3O4 anode material for high-performance lithium-ion batteries

Abstract

A mesoporous bowknot-like Co₃O₄ material has been synthesized through a facile hydrothermal method, using cobalt nitrate as the cobalt source, urea as the precipitator and gelatin as the guide agent, followed by calcination at 600 °C in air. Morphology characterization reveals that this bowknot-like Co₃O₄ material possesses a mesoporous structure consisting of nanoparticles. Electrochemical experiments illustrate that the mesoporous bowknot-like Co₃O₄ anode material exhibits a superior first and 100th reversible specific capacity of 1427.9 mA h g⁻¹ and 1388.8 mA h g⁻¹ at 0.2C, respectively. This material also delivers a high charge capacity of 751.3 mA h g⁻¹ after 150 cycles at 2C. The novel preparation method and satisfactory performance make the bowknot-like Co₃O₄ a good candidate as a high-performance anode material for use in Lithium-Ion Batteries (LIBs).