Molybdenum oxide-iron oxide/graphene composite as anode materials for lithium ion batteries

Molybdenum oxide-iron oxide/graphene (MoO 2 -Fe 3 O 4 /G) ternary nanocomposite is firstly prepared as for an anode material for lithium ion batteries. The MoO 2 -Fe 3 O 4 /G hybrid electrode exhibits a high specific capacity, long cycle life, and good rate capability. The initial charge specific capacity is 922.0 mAh g −1 of MoO 2 -Fe 3 O 4 /G nanocomposite and it increases to 1154.9 mAh g −1 gradually after 100 cycles, which is 125 % comparing to the initial charge capacity. The conductive graphene and Fe 3 O 4 nanoparticles facilitate the conductivity of electrons and the diffusion of lithium-ions by shortening the transport distance. Additionally, the graphene and Fe 3 O 4 not only work as a mechanical support to buffer the volume changes but also protect the MoO 2 crystals from agglomeration during lithium ion intercalation/de-intercalation. The results demonstrate that the MoO 2 -Fe 3 O 4 /G nanocomposite is a promising alternative anode material for practical Li-ion batteries.