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, Joo Ho Moon

Research output: Contribution to journalArticle

17 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

Fingerprint

solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Cathodes
cathodes
composite materials
Composite materials
Yttria stabilized zirconia
yttria-stabilized zirconia
durability
Electrolytes
Thermal expansion
insertion
thermal expansion
Durability
electrolytes
Polarization
life (durability)
microstructure
Microstructure
Electrodes

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

Cite this

Song, Hwa Seob ; Lee, Seungho ; Lee, Daehee ; Kim, Hongyeun ; Hyun, Sang Hoon ; Kim, Joosun ; Moon, Joo Ho. / Functionally-graded composite cathodes for durable and high performance solid oxide fuel cells. In: Journal of Power Sources. 2010 ; Vol. 195, No. 9. pp. 2628-2632.
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Functionally-graded composite cathodes for durable and high performance solid oxide fuel cells. / Song, Hwa Seob; Lee, Seungho; Lee, Daehee; Kim, Hongyeun; Hyun, Sang Hoon; Kim, Joosun; Moon, Joo Ho.

In: Journal of Power Sources, Vol. 195, No. 9, 01.05.2010, p. 2628-2632.

Research output: Contribution to journalArticle

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