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Performance of Ni/YSZ cermet cathode prepared by mechanical alloying for high temperature electrolysis of water vapor (steam): effect of anode and cathode thicknesses on the efficiency of hydrogen production

  • Sungkyu Lee , Kyoung-Hoon Kang , Hyun Seon Hong , Yong Seung Yun and Sang-Kook Woo
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 99 Issue 1

Abstract

Ni/YSZ (Y2O3-stabilized ZrO2) composite cathode is fabricated by high-nergy ball milling of Ni and YSZ powders for high temperature electrolysis of water vapor. Composite powder composition, time and rotation speed of ball milling were optimized by trial and error for suitable performance with maximum efficiency of fabricated cathode in high temperature electrolysis of water vapor (steam) at 800°C. The composite powders thus synthesized were characterized using various analytical tools such as X-ray diffraction, scanning electron microscopy and particle size analysis, and a self-supporting planar type unit cell was prepared with Ni/YSZ composite cathode and Pt paste anode screen-printed on each side of YSZ electrolyte disk (30 mm dia.) and then sintered at 1450°C for high temperature electrolysis. X-ray diffraction and particle size analysis results showed that the Ni/YSZ composite effectively consisted of crystalline Ni and YSZ distributed on a sub-micron scale and evenly distributed without aggregation of particles. To study the effect of anode and cathode thickness on the efficiency of the hydrogen production rate, screen-printing of anode and cathode was carried out on each side of YSZ electrolyte to three different thickness values during the fabrication of a self-supporting planar type unit cell which operated quite satisfactorily during high temperature electrolysis at 800°C: a significantly higher hydrogen production rate of 13 sccm (standard cubic centimeters per minute) was reproducibly observed for triple screen-printing of anode and cathode over each side of the YSZ electrolyte disk compared to 0.5 sccm for the single screen-printed cathode under an applied direct current of 0.7 mA cm−2. Additionally, linear increase in hydrogen production was observed with applied current for triple screen-printed electrodes in contrast to single and double screen-printed electrodes.

Keywords: High temperature electrolysis; Hydrogen; Ni/YSZ composite; Mechanical alloying; Yttria-stabilized zirconia
* Correspondence address, Dr. Sungkyu Lee, Project Manager, Plant Engineering Center, Institute for Advanced Engineering, 633-2, Goan-ri, Baegam-myeon, Cheoin-gu, Yongin-si, Gyeonggi-do, 449–863, Korea, Tel.: +52 823 1330 7318, Fax: +52 823 1330 7116, E-mail:

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Received: 2007-2-6
Accepted: 2007-10-19
Published Online: 2013-06-11
Published in Print: 2008-01-01

© 2008, Carl Hanser Verlag, München

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  4. Prof. Dr.-Ing. habil. Dr.-Ing. E. h. Werner Schatt zum 85. Geburtstag
  5. Basic
  6. In-situ reaction synthesis and decomposition of Ta2AlC
  7. A new theoretical equation for temperature dependent self-diffusion coefficients of pure liquid metals
  8. Thermodynamic characterization of liquid alloys with demixing tendency: Bi–Ga
  9. Space charge effects in confined ceramic systems
  10. Solute transport and phase composition in an Al–Mg–Si alloy solidified under conditions of forced flow
  11. Evidence of α → ω phase transition in titanium after high pressure torsion
  12. Thermodynamic properties and elastic constants of Nd–Mg intermetallics: a molecular dynamics study
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  14. Applied
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  18. Microstructural characteristics and elevated temperature wear of Ti-11Si-16Al alloy
  19. Nickel coating on some organic and carbon fibres by chemical plating
  20. Wear and corrosion properties of nanocrystalline coatings on stainless steel produced by plasma electrolytic nitrocarburizing
  21. The characterisation of microstructural changes in rapidly solidified Al–Fe alloys through measurement of their electrical resistance
  22. Solid inclusion cakes formed during pressure filtration tests of liquid aluminum alloys
  23. Performance of Ni/YSZ cermet cathode prepared by mechanical alloying for high temperature electrolysis of water vapor (steam): effect of anode and cathode thicknesses on the efficiency of hydrogen production
  24. Review
  25. Practical aspects and implications of interfaces in glass-ceramics: a review
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https://doi.org/10.3139/146.101613
Keywords for this article
High temperature electrolysis; Hydrogen; Ni/YSZ composite; Mechanical alloying; Yttria-stabilized zirconia

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Prof. Dr.-Ing. habil. Dr.-Ing. E. h. Werner Schatt zum 85. Geburtstag
  5. Basic
  6. In-situ reaction synthesis and decomposition of Ta2AlC
  7. A new theoretical equation for temperature dependent self-diffusion coefficients of pure liquid metals
  8. Thermodynamic characterization of liquid alloys with demixing tendency: Bi–Ga
  9. Space charge effects in confined ceramic systems
  10. Solute transport and phase composition in an Al–Mg–Si alloy solidified under conditions of forced flow
  11. Evidence of α → ω phase transition in titanium after high pressure torsion
  12. Thermodynamic properties and elastic constants of Nd–Mg intermetallics: a molecular dynamics study
  13. Microstructure, texture and mechanical properties of the magnesium alloy AZ31 processed by ECAP
  14. Applied
  15. Effect of solidification microstructure and Ca additions on creep strength of magnesium alloy AZ91 processed by Thixomolding
  16. Magnetic hardening mechanism of PrCo5-based ribbons with C addition prepared by melt spinning
  17. Studies on the exchange and dipolar couplings in Nd2Fe14B/α-Fe
  18. Microstructural characteristics and elevated temperature wear of Ti-11Si-16Al alloy
  19. Nickel coating on some organic and carbon fibres by chemical plating
  20. Wear and corrosion properties of nanocrystalline coatings on stainless steel produced by plasma electrolytic nitrocarburizing
  21. The characterisation of microstructural changes in rapidly solidified Al–Fe alloys through measurement of their electrical resistance
  22. Solid inclusion cakes formed during pressure filtration tests of liquid aluminum alloys
  23. Performance of Ni/YSZ cermet cathode prepared by mechanical alloying for high temperature electrolysis of water vapor (steam): effect of anode and cathode thicknesses on the efficiency of hydrogen production
  24. Review
  25. Practical aspects and implications of interfaces in glass-ceramics: a review
  26. Notifications
  27. DGM News
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