Abstract
TiO6 octahedra and PO4 tetrahedra are linked by the corners oxygen atoms to form a Lithium titanium phosphate, LiTi2(PO4)3, which is a 3D network with space group R3C . The are two different types of lithium ion sites exist in the LiTi2(PO4)3, N(1) and N(2) . In this study, Al2O3 and Fe2O3 are introduced to LiTi2(PO4)3 structure to observe its effects to the conductivity and chemical stability . It is found that the ionic conductivity of Li1.3Al0.09Fe0.21Ti1.7(PO4)3 would approach to 10-3 S/cm because the porosities is decreased and the densification of the pellet sample . Besides, the chemical stability of this system is excellent. Conseqently, the Li1.3FeyAl0.3-yTi1.7(PO4)3 (y=0~0.3) is a good material for solid state electrolyte .