Solid state rapid quenching method to synthesize micron size Li4Ti5O12

Li^sub 4^Ti^sub 5^O^sub 12^ 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 °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 Li^sub 4^Ti^sub 5^O^sub 12^ of an average size of 1-2 μm 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 1.4×10^sup -15^ cm^sup 2^ s^sup -1^. A maximum reversible lithium insertion capacity of 154 mAhg^sup -1^ at 2 C rate has been achieved. Results are discussed in this paper.[PUBLICATION ABSTRACT]