Process Optimization and Characterization of YSZ Thin Film Electrolyte on Anode Substrate Prepared by Electrophoretic Deposition Technique

Abstract:

Thin film electrolyte made of 8-mol% yttria stabilized zirconia (8YSZ) was fabricated on porous NiO-8YSZ anode substrates using electrophoretic deposition (EPD). The porous NiO-8YSZ anode substrates were prepared by powder injection molding technique. The electrolyte suspensions containing 8YSZ nanoparticles and polyethylene glycol (PEG) as a dispersant (1-19 wt%) were formed in ethanol. The maximum zeta potential value was obtained from the 8YSZ suspension with 5 wt% PEG considered as an optimal content of PEG dispersant. The electrophoretic deposition of 8YSZ film was performed on the porous anode substrate using a constant voltage of 30 V for 150 sec prior to co-sintering at different temperatures in order to obtain dense 8YSZ electrolyte film on the porous anode substrate. Co-sintering at 1250°C for 1 h resulted in a formation of a dense 8YSZ thin-film electrolyte with a thickness of 6.35 mm. An open circuit voltage at 800°C of a single cell having 8YSZ thin-film electrolyte on porous NiO-8YSZ anode substrate was 1.09 V, indicating a gas-tightness of 8YSZ thin-film electrolyte fabricated by using EPD.

• Periodical: Key Engineering Materials (Volume 751)
• Pages: 471-476
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.751.471
• Online since: August 2017
• Authors: Malinee Meepho*, Nutthita Chuankrerkkul, Sirima Chauoon, Rojana Pornprasertsuk
• Keywords: 8YSZ Electrolyte, Anode-Supported SOFC, Electrophoretic Deposition

References

[1] N.Q. Minh, Ceramic Fuel Cells, J. Am. Cer. Soc. 76(1993) 563-588.

[2] J. C. Kim, D. Y. Lee, H. -R. Kim, H. -W. Lee, J. -H. Lee, J. -W. Son, Surface modification of anode substrate via nano-powder slurry spin coating for the thin film electrolyte of solid oxide fuel cell, Thin Solid Film 519 (2011) 2534-2539.

DOI: 10.1016/j.tsf.2010.11.044

[3] T. V. Gestel, D. S., H. Pe. Buchkremer, Detlev Stöver, Assembly of 8YSZ Nanoparticles into gas-tight 1–2 M thick 8YSZ Electrolyte layers using wet coating methods, Journal Of the European Ceramic Society 32 (2012) 9-2.

DOI: 10.1016/j.jeurceramsoc.2011.07.012

[4] R. Hansch, M. Rahul, R. Chowdhury, N. H. Menzler, Screen printing of sol–gel-derived electrolytes for solid oxide fuel cell (SOFC) application, Cer. Inter. 35 (2009) 803–811.

DOI: 10.1016/j.ceramint.2008.02.020

[5] J. E Hong, T. Inagaki, S. Ida, T. Ishihara, Improved power generation performance of solid oxide fuel cells using doped LaGaO3 electrolyte films prepared by screen printing method II. Optimization of Ni-Ce0. 8Sm0. 2O1. 9 Cermet anode support, Int. J. Hydrogen Energ 36 (22) (2011).

DOI: 10.1016/j.ijhydene.2011.08.046

[6] Z. -C. Wang, K. -B. Kim, Fabrication of YSZ thin films from suspension by electrostatic spray deposition, Mater. Lett. 62 (2008) 425-428.

DOI: 10.1016/j.matlet.2007.05.058

[7] I. Park, J. Ahn, J. Im, J. Choi, D. Shin, Influence of rheological characteristics of YSZ Suspension on the morphology of YSZ Films deposited by electrostatic spray deposition, Cer. Int. 38S(2012)S481-S484.

DOI: 10.1016/j.ceramint.2011.05.058

[8] F. Guo, A. Javed, I. P. Shapiro, P. Xiao, Effect Of HCl Concentration on the sintering behavior of 8 mol% Y2O3 Stabilized ZrO2 Deposits produced by electrophoretic deposition(EPD), J. Eur. Ceram. Soc. 32 (2012) 211–218.

DOI: 10.1016/j.jeurceramsoc.2011.08.011

[9] D. Das, R. N. Basu, Suspension Chemistry and electrophoretic deposition of zirconia electrolyte on conducting and non-conducting substrate, Mater. Res. Bull. 48(9) (2013) 3254–3261.

DOI: 10.1016/j.materresbull.2013.05.034

[10] M. Meepho, S. Wattanasiriwech, P. Angkavatana, D. Wattanasiriwech, Application of 8YSZ Nanopowder Synthesized by the Modified Solvothermal Process for Anode Supported Solid Oxide Fuel Cells, Journal of nanoscience and nanotechnology, 15(3) (2015).

DOI: 10.1166/jnn.2015.10223

[11] A.G. Bhosale, R. Joshi, K.M. Subhedar, R. Mishra, S.H. Pawar, Acetone mediated electrophoretic deposition of nanocrystalline SDC on NiO-SDC ceramics, J. Alloy Comp. 503 (2010) 266–271.

DOI: 10.1016/j.jallcom.2010.05.013

[12] N. Chuankrerkkul, K. Somton, T. Wonglom, K. Dateraksa and P. Laoratanakul, Physical and Mechanical Properties of Zirconia Toughened Alumina (ZTA) Composites Fabricated by Powder Injection Moulding, Chiang Mai Journal of Science 43(2) (2016).

[13] S. K. Loghmani, M. F. -Rad, T. Shahrabi, Effect of polyethylene glycol on the electrophoretic deposition of hydroxyapatite nanoparticles in isopropanol, Cer. Int. 39 (2013) 7043–7051.

DOI: 10.1016/j.ceramint.2013.02.043