Development of double-perovskite compounds as cathode materials for low-temperature solid oxide fuel cells

Seonyoung Yoo, Areum Jun, Young Wan Ju, Dorj Odkhuu, Junji Hyodo, Hu Young Jeong, Noejung Park, Jeeyoung Shin, Tatsumi Ishihara, Guntae Kim

Research output: Contribution to journalArticlepeer-review

134 Citations (Scopus)

Abstract

A class of double-perovskite compounds display fast oxygen ion diffusion and high catalytic activity toward oxygen reduction while maintaining excellent compatibility with the electrolyte. The astoundingly extended stability of NdBa1-xCaxCo2O5+δ (NBCaCO) under both air and CO2-containing atmosphere is reported along with excellent electrochemical performance by only Ca doping into the A site of NdBaCo2O5+δ (NBCO). The enhanced stability can be ascribed to both the increased electron affinity of mobile oxygen species with Ca, determined through density functional theory calculations and the increased redox stability from the coulometric titration.

Original languageEnglish
Pages (from-to)13064-13067
Number of pages4
JournalAngewandte Chemie - International Edition
Volume53
Issue number48
DOIs
Publication statusPublished - Nov 24 2014

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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