Synthesis of Li_(1+x)V_3O_8 by citrate sol-gel route at low temperature

摘要

Li_(1+x)V_3O_8 was synthesized by a citrate sol-gel route using lithium acetate and ammonium metavanadate as the starting reagents. This process avoided the appearance of intermediate V_2O_5 sol. and pure Li_(1+x)V_3O_8 was obtained directly at low temperature. The effects of starting V/Li molar ratio on synthesis process are discussed in detail. The influence of pH value of the sol on the synthesis process and products was revealed by addition of NH_3 centre dot H_2O. The powders synthesized with different starting V/Li molar ratios were observed using scanning electron microscope, and their phases were analyzed using X-ray diffraction.