LiFePO4 wrapped reduced graphene oxide for high performance Li-ion battery electrode

One of the challenges in incorporating reduced graphene oxide (rGO) in energy storage material is to synthesize the homogenized mixtures of rGO with the electrode active materials at molecular level. In this direction, we have synthesized flexible, thin sheets of rGO-wrapped LiFePO4 plates using aqueous GO solution and precursors of LiFePO4. The in situ rGO provides necessary conductivity required for the charge storage performance. The LiFePO4/rGO composite was used as a active material without using any conductive carbon additive. The composite could be able to deliver the energy as high as about 161 mAh/g at C/10 rate and posses good cyclability. The high energy storage capabilities of LiFePO4 is due to the wrapping of highly conductive thin rGO sheets, which increases the electronic conductivity of the LiFePO4.