Solid state rapid quenching method to synthesize micron size Li4Ti5O12

Li4Ti5O12 spinel has been synthesized by a new solid-state rapid quenching method adopting solid-state synthesis followed by quenching leading to stoichiometric phase pure micron size material. By simple freezing of the solid-state reaction occurring at 800 degrees C using ice cold medium, micron sized particulates are achieved. The powder has been characterized by X-ray diffraction, SEM, etc. By this synthesis uniform morphology has been attained and particle size of fine particulates of Li4Ti5O12 of an average size of 1-2 mu m has been achieved. High rate characteristic and excellent cyclability are the highlights of newly synthesized material. Diffusion coefficient of Lithium has been evaluated and it is found to be 1.4x10(-15)cm(2)s(-1). A maximum reversible lithium insertion capacity of 154 mAhg(-1) at 2 C rate has been achieved. Results are discussed in this paper.