ZHAO Qingqing 1, WANG Jing 1, YANG Jinping 1, QI Airong 2
(1. Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, School of Materials Science and Engineering, Hebei United
University, Tangshan 063009, Hebei, China; 2. Polar Bear Building Materials CO., Ltd., Tangshan 063705, Hebei, China)
Abstract: The Co3O4 anode material was synthesized via the sol-gel auto-combustion method. The effects of the molar ratio of raw materials and the heat-treatment temperature on the phase composition, the particle morphology, structure and the electrochemical performance of the prepared Co3O4 acomposites were investigated by SEM, XRD and charge-discharge tests. The result shows that the Co3O4 ananoparticles prepared at the cobalt nitrate/citric acid molar ratio of 1:2 by heat treatment at 400 ℃ in air exhibit excellent specific capacity. The reversible capacity is 1121.4 mAhg-1 after the first cycle and remains 865.3 mAhg-1 after 30 cycles, about 77.2% of the initial reversible capacity.
Key words: cobalt oxide; anode; lithium-ion batteries