Lithium ion-conducting glass-ceramics in the system Li2O–TiO2–P2O5–Cr2O3–SiO2

Abstract Conductive glass-ceramics based on Li 2 O–TiO 2 –P 2 O 5 –Cr 2 O 3 –SiO 2 system were fabricated by heat-treatment at the crystallization peak temperature for 2 h. The crystallization behavior of glass-ceramics was identified by differential thermal analysis (DTA), X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) methods and their conductivity behavior was investigated by complex impedance techniques. The glass-ceramics were mainly composed of LiTi 2 (PO 4 ) 3 in which Ti 4 + ions were partially replaced by Cr 3 + ions. A considerable enhancement in conductivity was observed by partial substitution of Ti 4 + by Cr 3 + ions. 100 part [Li 1.5 Cr 0.5 Ti 1.5 (PO 4 ) 3 ] and 5 part SiO 2 glass-ceramics in the 100 part [Li 1 + x Cr x Ti 2 − x (PO 4 ) 3 ] and 5 part SiO 2 system, where x = 0–0.8, exhibited the highest ambient conductivity value of 2.14 × 10 − 2  S/cm with an activation energy as low as 15.1 kJ/mol.