Design and processing parameters of La2NiO4+δ-based cathode for anode-supported planar solid oxide fuel cells (SOFCs)

Changwoo Jeong, Jong Heun Lee, Mansoo Park, Jongsup Hong, Hyoungchul Kim, Ji Won Son, Jong Ho Lee, Byung Kook Kim, Kyung Joong Yoon

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The Ruddlesden-Popper phase lanthanum nickelate, La2NiO4+δ (LNO), is successfully implemented as a strontium- and cobalt-free cathode in anode-supported planar solid oxide fuel cells (SOFCs) through systematic optimization of materials, processing and structural parameters. Chemical interaction between LNO and gadolinia-doped ceria (GDC), which leads to phase decomposition of composite cathode and significant deterioration of the electrochemical performance, is prevented by lowering the processing temperature below 1000 °C. For low-temperature fabrication process, the thermo-mechanical stability at the interface is secured by modifying the powder characteristics and inserting the adhesive interlayer. The issues associated with the electrical contact and current distribution are resolved by incorporating the perovskite La0.6Sr0.4CoO3-δ (LSC) as a current collecting layer, and the thermal stresses at the interface are relieved by constructing a gradient electrode structure. Consequently, the optimized anode-supported planar cell with an LNO-based cathode exhibits superior performance compared to the reference cell with a conventional cathode in the intermediate-temperature range, which is attributed to the enhanced interfacial process and surface reaction kinetics based on impedance analysis.

Original languageEnglish
Pages (from-to)370-378
Number of pages9
JournalJournal of Power Sources
Volume297
DOIs
Publication statusPublished - 2015 Nov 30

Fingerprint

solid oxide fuel cells
Solid oxide fuel cells (SOFC)
Anodes
Cathodes
anodes
cathodes
Processing
Lanthanum
Strontium
Mechanical stability
Gadolinium
Cerium compounds
Surface reactions
current distribution
gadolinium
thermal stresses
Cobalt
cells
deterioration
lanthanum

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

Jeong, Changwoo ; Lee, Jong Heun ; Park, Mansoo ; Hong, Jongsup ; Kim, Hyoungchul ; Son, Ji Won ; Lee, Jong Ho ; Kim, Byung Kook ; Yoon, Kyung Joong. / Design and processing parameters of La2NiO4+δ-based cathode for anode-supported planar solid oxide fuel cells (SOFCs). In: Journal of Power Sources. 2015 ; Vol. 297. pp. 370-378.
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Design and processing parameters of La2NiO4+δ-based cathode for anode-supported planar solid oxide fuel cells (SOFCs). / Jeong, Changwoo; Lee, Jong Heun; Park, Mansoo; Hong, Jongsup; Kim, Hyoungchul; Son, Ji Won; Lee, Jong Ho; Kim, Byung Kook; Yoon, Kyung Joong.

In: Journal of Power Sources, Vol. 297, 30.11.2015, p. 370-378.

Research output: Contribution to journalArticle

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AU - Kim, Hyoungchul

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AU - Lee, Jong Ho

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N2 - The Ruddlesden-Popper phase lanthanum nickelate, La2NiO4+δ (LNO), is successfully implemented as a strontium- and cobalt-free cathode in anode-supported planar solid oxide fuel cells (SOFCs) through systematic optimization of materials, processing and structural parameters. Chemical interaction between LNO and gadolinia-doped ceria (GDC), which leads to phase decomposition of composite cathode and significant deterioration of the electrochemical performance, is prevented by lowering the processing temperature below 1000 °C. For low-temperature fabrication process, the thermo-mechanical stability at the interface is secured by modifying the powder characteristics and inserting the adhesive interlayer. The issues associated with the electrical contact and current distribution are resolved by incorporating the perovskite La0.6Sr0.4CoO3-δ (LSC) as a current collecting layer, and the thermal stresses at the interface are relieved by constructing a gradient electrode structure. Consequently, the optimized anode-supported planar cell with an LNO-based cathode exhibits superior performance compared to the reference cell with a conventional cathode in the intermediate-temperature range, which is attributed to the enhanced interfacial process and surface reaction kinetics based on impedance analysis.

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