Hydrothermal preparation of nanometer lithium nickel vanadium oxide powderat low temperature

a new hydrothermal process has been developed in this study for synthesizin g nanometer LiNiVO4 powder. It was found that when using distilled water as solvent, LiNiVO4 cannot be obtained, and different types of unidentified p roducts ale formed. On the other hand. when isopropanol is used, LiNiVO4 po wder can be successfully prepared. In comparison with the conventional proc ess, the new hydrothermal process significantly lowers the required reactio n temperature and reduces the size of formed particles. In the new process, the required temperature for preparing LiNiVO4 is reduced to 200 degrees C , and the particle size is decreased to nanometer. The crystallinity of LiN iVO4 can be improved by increasing the hydrothermal temperature and adding ammonia carbonate. (C) 2000 Elsevier Science S.A. All rights reserved.