Synthesis of carbon-coated VBO3 nanoparticles on graphene sheets as anode material for lithium-ion batteries by freeze-drying method

Abstract

Carbon-coated VBO3 on graphene sheets (VBO3/C@G) composite synthesized by freeze-drying method is presented as anode material for lithium-ion batteries. In the final material, VBO3 nanoparticles, which are uniformly coated by amorphous carbon, are either adhered to the surface of graphene sheets or covered by graphene sheets. The amorphous carbon and graphene not only prevent the growth of VBO3 nanoparticles but also provide an excellent conductive 3D network, which is beneficial for the battery performance. The material delivers an initial charge capacity of 787 mAh g−1 at 0.1 C and maintains 697 mAh g−1 after 100 cycles at 0.1 C. It also exhibits an excellent rate performance with a charge capacity of 609 mAh g−1 at 10 C.