Hydrothermal Synthesis and Characterization of LiZr_2(PO_4)_3

摘要

Lithium dizirconium phosphate (LiZr_2(PO_4)_3) possesses good ionic conductivity owing to its unique framework structure and can be used as favorable anode material in Li-ion battery. LiZr_2(PO_4)_3 is commonly prepared by solid phase reaction in which higher temperature is needed and pure LiZr_2(PO_4)_3 without other phases is difficult to obtain in the final products. In this paper, low cost hydrothermal synthesis of pure (LiZr_2(PO_4)_3) was studied. Effects of the hydrothermal conditions (molar ratios of Li~+ to ZrOCl_2, addition of HF, pH values of reaction system and hydrothermal temperatures) on the phase composition of the products were investigated. The results showed that pure LiZr_2(PO_4)_3 was successfully prepared at lower temperature of 80°C for 24h with the addition of HF when the pH value was adjusted to 5.0 and the molar ratio of Li~+ to ZrOCl_2 was 0.5 with the concentration of ZrOCl_2 as 0.6mol/L. The phases and purity of the final products were characterized by XRD analysis.