Functionally-graded composite cathodes for durable and high performance solid oxide fuel cells

Hwa Seob Song, Seungho Lee, Daehee Lee, Hongyeun Kim, Sang Hoon Hyun, Joosun Kim, Jooho Moon

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A double-layer dual-composite cathode is fabricated and has an ideal cathode microstructure with large electrochemical active sites and enhanced the durability in solid oxide fuel cells (SOFCs). The insertion of a yttria-stabilized zirconia (YSZ)-rich functional layer between the electrolyte and the electrode allows for a graded transition of the YSZ phase, which enhances ionic percolation and minimizes the thermal expansion coefficient mismatch. Electrochemical measurements reveal that the double-layer composite cathode exhibits improved cathodic performance and long-term stability compared with a single-layer composite cathode. A cell with a well-controlled cathode maintains nearly constant interfacial polarization resistance during an 80 h accelerated lifetime test.

Original languageEnglish
Pages (from-to)2628-2632
Number of pages5
JournalJournal of Power Sources
Volume195
Issue number9
DOIs
Publication statusPublished - 2010 May 1

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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