Li2FeSiO4/C with good performance as cathode material for Li-ion battery

• Pure-phased Li2FeSiO4/C is prepared by the sol–gel method with Fe2O3 nanoparticle.
• The particle size of Li2FeSiO4 is close to Fe2O3 nanoparticle.
• It owns stable cycle performance at 0.1C to 5C rate.
• It has good rate performance.

Li2FeSiO4/C has been prepared by the ultrasonic-assisted sol–gel method with about 50 nm Fe2O3 particle as Fe source. The structures, morphologies, and carbon content of the product are characterized. Li2FeSiO4/C owns pure phase and the particle size of Li2FeSiO4 is close to Fe2O3 nanoparticle. As the cathode material of Li-ion battery, the product shows stable cycle performance at the wide range of rate and good rate performance. The discharge capacities of the 100th cycle are 140 mAh g−1, 125 mAh g−1, 120 mAh g−1, 110 mAh g−1, and 90 mAh g−1 at 0.1C, 0.5C, 1C, 2C, and 5C rate, respectively.