Novel Proton-Conducting Layered Perovskites Based on BaLa2In2O7 Produced by Cationic Co-Doping

Proton conducting materials are used in electrochemical devices such as proton conducting fuel cells and proton conducting electrolyzers. These devices belong to the hydrogen energy field and serve the goals of clean energy and sustainable environmental development. Layered perovskites are a promising class of proton conducting electrolytes. Cationic co-doping is a well-known method to improve the transport properties of classical perovskite ABO(3). However, data on the application of this method to layered perovskites are limited. In this work, the bilayered perovskites BaLa1.9-xSrxGd0.1In2O7-0.5x have been prepared and studied for the first time. The possibility of oxygen-ionic and proton transport was demonstrated. Cationic co-doping was shown to increase the proton conductivity values by up to 1.5 orders of magnitude.

Automated summary

Proton conducting materials play a crucial role in hydrogen energy devices, such as fuel cells and electrolyzers, contributing to clean energy and sustainable environmental development. Layered perovskites, specifically the bilayered perovskites BaLa1.9-xSrxGd0.1In2O7-0.5x, show potential as proton conducting electrolytes. Cationic co-doping significantly enhances the proton conductivity, increasing it by up to 1.5 orders of magnitude.