Pure lithium titanate (Li4Ti5O12) nanoparticles were synthesized at low temperature via a new simple method. First, amorphous titanium dioxide (TiO2) nanoparticles with a high surface area (624 m(2) g(-1)) were prepared by using tetrahydrofuran (THF) as a solvent in the hydrolysis reaction of titanium tetraisopropoxide (TTIP) at room temperature. Pure Li(4)T(i)5O(12) nanoparticles with a particle size of 10-30 nm were obtained by introducing Li+ into the amorphous TiO2 nanoparticles at room temperature.