Synthesis of the LiFePO4 by a solid-state reaction using organic acids as a reducing agent

Olivine LiFePO₄ using organic acid as a reducing agent has been synthesized utilizing a solid-state method. Samples were characterized by an X-ray diffraction and a scanning electron microscope. The single-phase LiFePO₄ and small grain size of the crystallite were obtained without the use of a carbon-coating process. In such LiFePO₄ powder, the initial specific capacity was 142 mAhg⁻¹ at a current rate of 0.1 C. After the 50th cycle test, the reversible specific capacity was 132 mAhg⁻¹ at a 2 C rate, showing a retention ratio to the initial capacity as 98.4%.