WANG Yongliang 1,2, LIU Lizhu 1, MA Rongxin 1, XU Zhanchun 2, LI Fenghui 2
(1. Harbin University of Science and Technology, Harbin 150040, Heilongjiang,China;
2. ChinaNational Key Laboratory of Coal Coke and Graphite, Hegang 155410, Heilongjiang,China)
Abstract: Different from the common used two-steps method for Co3O4/graphene composite, a one-pot method was given here. The phase,morphologies, distribution and electrochemical properties of Co3O4/graphene composite via one-pot method were investigated. Graphene was synthesized vir ball milling which avoided the properties decrease of graphene than Hummer method. In-situ hydrothermal method was used which induced fine dispersion of graphene and Co3O4. XRD results indicated that Co3O4/graphene composites were obtained. The diameter of Co3O4 is about 14 nm and the Co3O4nanoparticles were uniformly distributed on the graphene sheets. The specific capacitance value of the Co3O4/graphene composite reached 215 F∙g-1.
Key words: graphene; Co3O4; hydrothermal; one-pot method