Effect of starting particulate materials on microstructure and cathodic performance of nanoporous LSM-YSZ composite cathodes

Hwa Seob Song, Wi Hun Kim, Sang Hoon Hyun, Jooho Moon, Joosun Kim, Hae Weon Lee

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Nano-scale LSM-YSZ composite electrodes are prepared from a mixture of yttria stabilized zirconia (YSZ) and strontium-doped lanthanum manganite (LSM) particles. Commercial YSZ particles are mixed with polymerizable complex method-driven LSM powders of two different particle sizes, namely, 81 and 210 nm. Then, the correlations between the properties of the starting particles, sintering temperature, microstructure and cell performance are studied. Use of smaller LSM particles in the composite electrode induces extensive grain growth. This significantly reduces the triple phase boundary (TPB) and leads to an increase in the polarization resistance. The composite cathode derived from larger LSM particles exhibits a lower total polarization resistance (∼0.31 Ω cm2 at 800 °C) and, subsequently, better maximum cell power (∼630 mA cm-2). By contrast, larger resistance and lower cell power are observed for electrodes composed of smaller LSM particles.

Original languageEnglish
Pages (from-to)258-264
Number of pages7
JournalJournal of Power Sources
Volume167
Issue number2
DOIs
Publication statusPublished - 2007 May 15

Fingerprint

Yttria stabilized zirconia
yttria-stabilized zirconia
particulates
Cathodes
cathodes
microstructure
Microstructure
Electrodes
composite materials
Composite materials
Polarization
Lanthanum
Strontium
Phase boundaries
Grain growth
Powders
Sintering
electrodes
Particle size
cells

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 ; Kim, Wi Hun ; Hyun, Sang Hoon ; Moon, Jooho ; Kim, Joosun ; Lee, Hae Weon. / Effect of starting particulate materials on microstructure and cathodic performance of nanoporous LSM-YSZ composite cathodes. In: Journal of Power Sources. 2007 ; Vol. 167, No. 2. pp. 258-264.
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Effect of starting particulate materials on microstructure and cathodic performance of nanoporous LSM-YSZ composite cathodes. / Song, Hwa Seob; Kim, Wi Hun; Hyun, Sang Hoon; Moon, Jooho; Kim, Joosun; Lee, Hae Weon.

In: Journal of Power Sources, Vol. 167, No. 2, 15.05.2007, p. 258-264.

Research output: Contribution to journalArticle

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T1 - Effect of starting particulate materials on microstructure and cathodic performance of nanoporous LSM-YSZ composite cathodes

AU - Song, Hwa Seob

AU - Kim, Wi Hun

AU - Hyun, Sang Hoon

AU - Moon, Jooho

AU - Kim, Joosun

AU - Lee, Hae Weon

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AB - Nano-scale LSM-YSZ composite electrodes are prepared from a mixture of yttria stabilized zirconia (YSZ) and strontium-doped lanthanum manganite (LSM) particles. Commercial YSZ particles are mixed with polymerizable complex method-driven LSM powders of two different particle sizes, namely, 81 and 210 nm. Then, the correlations between the properties of the starting particles, sintering temperature, microstructure and cell performance are studied. Use of smaller LSM particles in the composite electrode induces extensive grain growth. This significantly reduces the triple phase boundary (TPB) and leads to an increase in the polarization resistance. The composite cathode derived from larger LSM particles exhibits a lower total polarization resistance (∼0.31 Ω cm2 at 800 °C) and, subsequently, better maximum cell power (∼630 mA cm-2). By contrast, larger resistance and lower cell power are observed for electrodes composed of smaller LSM particles.

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