Oxygen Non-Stoichiometry and Point Defect Equilibria in (La 1/6 Pr 1/6 Nd 1/6 Gd 1/6 Ba 1/6 Sr 1/6 )MnO 3- δ

In this work, the A-site of the common SOFC cathode La 0.8 Sr 0.2 MnO 3-δ (LSM) is modified with additional lanthanide and alkali elements, resulting in the composition (La 1/6 Pr 1/6 Nd 1/6 Gd 1/6 Ba 1/6 Sr 1/6 )MnO 3- δ . We show that the amount of oxygen released during reduction measured by ther...

Full description

Saved in:
Bibliographic Details
Published in:ECS transactions 2023-05, Vol.111 (6), p.1135-1138
Main Authors: Bishop, Sean R, Zhang, Dawei, Liu, Cijie, Li, Wei, Salinas, Perla A, Smith, Andrew I, Coker, Eric N, De Santiago, Héctor A, Liu, Xingbo, McDaniel, Anthony H, Luo, Jian
Format: Article
Language:English
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this work, the A-site of the common SOFC cathode La 0.8 Sr 0.2 MnO 3-δ (LSM) is modified with additional lanthanide and alkali elements, resulting in the composition (La 1/6 Pr 1/6 Nd 1/6 Gd 1/6 Ba 1/6 Sr 1/6 )MnO 3- δ . We show that the amount of oxygen released during reduction measured by thermo-gravimetric analysis is significantly greater for this “high entropy” perovskite oxide (HEPO) in comparison with La 2/3 Sr 1/3 MnO 3-δ , the latter having the same amount of total acceptor dopant and with a similar average A-site radius. The origins of enhanced reduction will be discussed.
ISSN:1938-5862
1938-6737
DOI:10.1149/11106.1135ecst