Facile Synthesis for LiFePO4 Nanospheres in Tridimensional Porous Carbon Framework for Lithium Ion Batteries

The excellent electronic conductivity and high surface area are two crucial factors for electrode materials to achieve high energy and power capabilities in lithium ion batteries. This article presents a feasible method to obtain nanospherical electrode materials in the versatile carbon framework. A facile synthesis has been developed to prepare LiFePO 4 nanospheres with an average diameter of ∼300 nm lodged in the tridimensional (3D) porous carbon structure. This LiFePO 4 /C composite possesses the considerably enhanced electronic conductivity of ∼10 −2 Scm −1 and amazing high surface area of 200.5 m 2 g −1, and the lithium ion diffusion coefficient of ∼10 −15 −10 −14 cm 2 s −1 is calculated. The LiFePO 4 /C cathode material delivers discharge capacities of 155.0 mAhg −1 at 0.1 C and 69.5 mAhg −1 at 20 C. Furthermore, the pristine LiFePO 4 /C entity has exhibited discharge capacity of 127.8 mAhg −1 at 0.1 C without conductive carbon additives.