Facile Synthesis of the High-Pressure Polymorph of Nanocrystalline LiFePO4 at Ambient Pressure and Low Temperature

The standard synthesis of the high-pressure polymorph of LiFePO4 (Cmcm phase) requires pressures of 65 000 bar and temperatures of 900 °C. Surprisingly, the nanocrystalline material can be prepared by a simple liquid-phase synthesis at ambient pressure and 150 °C. Reversible electrochemical Li-(de)insertion (Δx = 0.2, charge density = 30 mAh g−1) was found.