Preparation of Nano-Li[sub 2]FeSiO[sub 4] as Cathode Material for Lithium-Ion Batteries

A sol–gel method based on citric acid was employed to prepare as a cathode material for lithium-ion batteries. The citric acid acts as both a chelating agent and a carbon source in the synthetic process. The obtained has a monoclinic unit cell in space group . The average size of particles is approximately 80 nm. The maximum discharge capacity of is observed in the third cycle, and 98.3% of the maximum discharge capacity is retained after 80 charge–discharge cycles.