Optimization of Ni-zirconia based anode support for robust and high-performance 5 × 5 cm2 sized SOFC via tape-casting/co-firing technique and nano-structured anode

Jae Ha Myung, Tae Ho Shin, Sun Dong Kim, Hae Gu Park, Joo Ho Moon, Sang Hoon Hyun

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

High-performance Ni-zirconia based anode supported cells were developed via a cost-effective tape-casting/co-firing technique and a nano structured anode. The fundamental properties for conventional NiO-YSZ anode supports - such as porosity, shrinkage, electrical conductivity and mechanical strength - were measured as a function of the proportion of NiO and YSZ (coarse and fine powders). Electrical conductivity, shrinkage, porosity, strength were found to be 1200 S/cm, 22%, 45% and 55 MPa, respectively, for a composition of NiO:YSZ (60:40 wt%) and coarse:fine YSZ (50:50 wt%). However, warping of the cell and delamination was frequently observed between the anode and the electrolyte after the co-firing step. The NiO/YSZ-ScSZ (40/30-30 wt%) nano-composite anode was synthesized to increase the connectivity of Ni phase, the sinter-ability of YSZ phases and to match the shrinkage with ScSZ electrolyte. It displayed strength of 95 MPa, an electrical conductivity of 1400 S/cm with thermal stability after cycling 10 times, 50% porosity, and 28% shrinkage; the latter being particularly similar to the ScSZ electrolyte. Moreover, the 5 × 5 cm2 sized single cell consisting of the NiO/YSZ-ScSZ anode, ScSZ electrolyte and an LSM-YSZ cathode showed 19 μ/5 cm of flatness and a power of over 13.3 W (0.83 W/cm2) with hydrogen at 700 °C.

Original languageEnglish
Pages (from-to)2792-2799
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume40
Issue number6
DOIs
Publication statusPublished - 2015 Feb 19

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yttria-stabilized zirconia
Solid oxide fuel cells (SOFC)
zirconium oxides
Zirconia
Tapes
tapes
Anodes
Casting
anodes
optimization
Electrolytes
shrinkage
Porosity
electrolytes
porosity
electrical resistivity
cell anodes
Delamination
Strength of materials
Cathodes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

@article{6f6911263fa8418883ae32cc62e7c1c2,
title = "Optimization of Ni-zirconia based anode support for robust and high-performance 5 × 5 cm2 sized SOFC via tape-casting/co-firing technique and nano-structured anode",
abstract = "High-performance Ni-zirconia based anode supported cells were developed via a cost-effective tape-casting/co-firing technique and a nano structured anode. The fundamental properties for conventional NiO-YSZ anode supports - such as porosity, shrinkage, electrical conductivity and mechanical strength - were measured as a function of the proportion of NiO and YSZ (coarse and fine powders). Electrical conductivity, shrinkage, porosity, strength were found to be 1200 S/cm, 22{\%}, 45{\%} and 55 MPa, respectively, for a composition of NiO:YSZ (60:40 wt{\%}) and coarse:fine YSZ (50:50 wt{\%}). However, warping of the cell and delamination was frequently observed between the anode and the electrolyte after the co-firing step. The NiO/YSZ-ScSZ (40/30-30 wt{\%}) nano-composite anode was synthesized to increase the connectivity of Ni phase, the sinter-ability of YSZ phases and to match the shrinkage with ScSZ electrolyte. It displayed strength of 95 MPa, an electrical conductivity of 1400 S/cm with thermal stability after cycling 10 times, 50{\%} porosity, and 28{\%} shrinkage; the latter being particularly similar to the ScSZ electrolyte. Moreover, the 5 × 5 cm2 sized single cell consisting of the NiO/YSZ-ScSZ anode, ScSZ electrolyte and an LSM-YSZ cathode showed 19 μ/5 cm of flatness and a power of over 13.3 W (0.83 W/cm2) with hydrogen at 700 °C.",
author = "Myung, {Jae Ha} and Shin, {Tae Ho} and Kim, {Sun Dong} and Park, {Hae Gu} and Moon, {Joo Ho} and Hyun, {Sang Hoon}",
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Optimization of Ni-zirconia based anode support for robust and high-performance 5 × 5 cm2 sized SOFC via tape-casting/co-firing technique and nano-structured anode. / Myung, Jae Ha; Shin, Tae Ho; Kim, Sun Dong; Park, Hae Gu; Moon, Joo Ho; Hyun, Sang Hoon.

In: International Journal of Hydrogen Energy, Vol. 40, No. 6, 19.02.2015, p. 2792-2799.

Research output: Contribution to journalArticle

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T1 - Optimization of Ni-zirconia based anode support for robust and high-performance 5 × 5 cm2 sized SOFC via tape-casting/co-firing technique and nano-structured anode

AU - Myung, Jae Ha

AU - Shin, Tae Ho

AU - Kim, Sun Dong

AU - Park, Hae Gu

AU - Moon, Joo Ho

AU - Hyun, Sang Hoon

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AB - High-performance Ni-zirconia based anode supported cells were developed via a cost-effective tape-casting/co-firing technique and a nano structured anode. The fundamental properties for conventional NiO-YSZ anode supports - such as porosity, shrinkage, electrical conductivity and mechanical strength - were measured as a function of the proportion of NiO and YSZ (coarse and fine powders). Electrical conductivity, shrinkage, porosity, strength were found to be 1200 S/cm, 22%, 45% and 55 MPa, respectively, for a composition of NiO:YSZ (60:40 wt%) and coarse:fine YSZ (50:50 wt%). However, warping of the cell and delamination was frequently observed between the anode and the electrolyte after the co-firing step. The NiO/YSZ-ScSZ (40/30-30 wt%) nano-composite anode was synthesized to increase the connectivity of Ni phase, the sinter-ability of YSZ phases and to match the shrinkage with ScSZ electrolyte. It displayed strength of 95 MPa, an electrical conductivity of 1400 S/cm with thermal stability after cycling 10 times, 50% porosity, and 28% shrinkage; the latter being particularly similar to the ScSZ electrolyte. Moreover, the 5 × 5 cm2 sized single cell consisting of the NiO/YSZ-ScSZ anode, ScSZ electrolyte and an LSM-YSZ cathode showed 19 μ/5 cm of flatness and a power of over 13.3 W (0.83 W/cm2) with hydrogen at 700 °C.

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