Abstract
We investigated the synergistic influences of synthesis methods (solid-state reaction vs. sol-gel process) and Zr4+ doping on the structure and ionic conductivity of perovskite-structured Li0.5La0.5TiO3 (LLTO) solid electrolytes. The lithium-ion conductivity of Li0.5La0.5Ti1 − x Zr x O3 ceramic specimens was evaluated as a function of x value and compared carefully between those two synthesis methods. Regarding the conductivity, sol-gel process is better for the synthesis of LLTO than solid-state reaction. As a result, the highest grain conductivity is obtained in the sol-gel-derived pure LLTO sample with x = 0, reaching 1.10 × 10−3 S · cm−1. Partial substitution of Zr4+ enlarges the LLTO’s grain aggregate size and increases the total superficial area of aggregates. Consequently, Zr4+ substitution not only affects the grain (bulk) conductivity, but more importantly, also improves the grain boundary conductivity and the total conductivity. The highest total conductivity is 5.84 × 10−5 S · cm−1 with x = 0.04 by sol-gel process.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call