Abstract
Fine particles of Li+ ion conductive material Li1.5Al0.5Ti1.5(PO4)3 were prepared by sol-gel method. Using prepared Li1.5Al0.5Ti1.5(PO4)3 particles, three dimensionally ordered macroporous membranes of Li1.5Al0.5Ti1.5(PO4)3 were prepared by colloidal crystal templating method. Colloidal crystal composed of mono-disperse polystyrene particles (3.0μm diameter) was utilized as a template. Three-dimensionally ordered composite membrane were prepared by filtrating polystyrene particles and Li1.5Al0.5Ti1.5(PO4)3 particles. Polystyrene particles were removed by calcinations at high temperature, and then macroporous Li1.5Al0.5Ti1.5(PO4)3 was obtained. Li+ ion conductivity of prepared macroporous Li1.5Al0.5Ti1.5(PO4)3 membrane annealed at 950°C for 12 hour, was 5.3×10−5 S cm−1 at room temperature.
