Synthesis of Nanostructured Li_4Ti_5O_(12) Powder by the Glycine-Nitrate Process and a Modified Glycine-Nitrate Process

摘要

We have studied the influence of the glycine : nitrate (G/N) ratio and heat treatment temperature on characteristics of nanocrystalline Li4Ti5O12 powders synthesized from titanium tetrabutylate and lithium carbonate via combustion of an aqueous-organic precursor, followed by heat treatment. At the optimum reactant ratioG/N= 0.7, the content of the Li4Ti5O12 phase after heat treatment of the powders for 2 h at 700 degrees C is 97% and the crystallite size is 100 nm. It has been shown that modifying the glycine-nitrate process by adding citric acid to solution (CitH(3)/Sigma M = 0.37-0.56) allows one to improve the homogeneity of the components in the precursor, thus ensuring the preparation of single-phase powders.