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A novel electrode system composed of threedimensionally ordered macroporous (3DOM) Li 1.5 Al 0.5-Ti 1.5 (PO 4 ) 3 (LATP) and LiMn 2 O 4 was fabricated by the colloidal crystal templating method and sol-gel process. A LATP nanoparticle for the fabrication of 3DOM-LATP was prepared by a sol-gel process. A suspension containing polystyrene (PS) beads and the LATP nanoparticles was filtrated by using a polycarbonate filter to accumulate PS beads and LATP. The accumulated PS beads had a close-packing structure, and the void between PS beads was filled with LATP nanoparticles. 3DOM-LATP was obtained by heat treatment of the accumulated composite. Li-Mn-O sol was injected by a vacuum impregnation process into the macropores of 3DOM-LATP and then was heated to form three-dimensionally ordered composite materials consisting of LiMn 2 O 4 and LATP. The formation of the composite between 3DOM-LATP and LiMn 2 O 4 were confirmed with scanning electron microscopy and Xray diffraction method. The prepared composite electrode system exhibited a good electrochemical performance.

Li 1+x Al x Ge 2-x (PO 4 ) 3 (LAGP) solid electrolyte is one of the promising solid electrolytes for lithium ion batteries. The LAGP electrolyte was prepared by a sol-gel method. A gelation powder was calcined at 500 o C to obtain precursor powder for LAGP. The obtained powder was pelletized and calcined at 800, 850, and 900 o C. The pellets possessed NASICON structure, indicating that the LAGP was successfully prepared. The pellet calcined at 850 o C showed the highest lithium ion conductivity, 1.4×10 -4 S cm -1 , which is acceptable for all-solid-state lithium battery. Although some modification is still needed to improve the lithium ion conductivity of LAGP prepared by the sol-gel method, this finding provides us a new route for LAGP preparation.