The preparation and lithium mobility of zinc based NASICON-type solid electrolyte Li1+2x+2yAlxZnyTi2−x−ySixP3−xO12

A series of Nasicon-type solid electrolytes Li 1+2 x +2 y Al x Zn y Ti 2− x − y Si x P 3− x O 12 was synthesized by conventional solid state ceramic route. X-ray diffraction and Rietveld whole pattern refinement were applied to investigate the phase, structure and the unit cell parameters of those solid electrolytes . EIS complex impedance method was carried out to study the Li + conductivity. The results showed that Li 1+2 x +2 y Al x Zn y Ti 2− x − y Si x P 3− x O 12 with x =0.1 y =0.5 presents highest ionic conductivity 7.2×10 −5   S   cm −1 at ambient temperature and 2.0×10 −3   S   cm −1 at 473   K. The activation energy of Li + migration was calculated to be ca. 20   kJ   mol −1 . The influence of Zn 2+ element on the structure and Li + mobility was preliminary explained.