▎ 摘　　要

In this work, the composites of nitrogen-doped graphene framework and Co3O4 nanoparticles with adjustable morphologies (NG/Co3O4) were fabricated via a surfactant-assisted hydrothermal route for first time. Three different surfactants including triblock copolymer F127, cetyltrimethyl ammonium bromide and sodium dodecyl sulfate are involved in the hybrid-assembly of graphene oxide, o-phthalonitrile and cobalt acetate in water/ethanol. Among the obtained samples, the one using F127 (NG/Co3O4-F127) manifests the most homogeneous distribution of Co3O4 NPs with the size of similar to 15 nm in the macropore-walls formed by NG. As the anode material in lithium ion battery (LIB), NG/Co(3)O(4)F127 exhibits excellent electrochemical performance, which is superior to the other composites and most of the previously reported Co3O4 based anode materials in LIBs. (C) 2016 Elsevier Ltd. All rights reserved.