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Electrical Conductivity and Characterization of CeO2 Doped 8YSZ Electrolyte with 2%wt CuO Doping

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Abstract:

Nano-sized electrolyte of CeO2 doped 8YSZ with 2%mol CuO (YSZDC)powders were synthesized by solid state reaction method. Powder characteristics and electrical properties was characterized by XRD,SEM and Electrochemical workstation.The results demonstrate that the as-synthesized Y0.08Zr0.72Ce0.2O1.6 (YSZDC) and Y0.08Zr0.72Ce0.18Cu 0.02O1.6-δ(YSZDC-Cu0.02) possessed similar powder characteristics, including cubic fluorite crystalline structure.About 150 °C reduction in densification temperature of Y0.08Zr0.72Ce0.18Cu0.02O1.6-δ was obtained when compared with Y0.08Zr0.72Ce0.2O1.6.The YSZDC-Cu0.02 pellets sintered at 1300 °C and the YSZDC sintered at 1450 °C exhibited relative densities of 95.66% and 94.73%,respectively.Electrolyte matrixs were prepared for electrolyte-supported SOFCs(ES-SOFC) , the suspension of NiO-YSZ anode was sprayed on the electrolyte, after co-sintering at 1300°C,electrolyte matrixs and anode were well adhered each othert, without connecting pores and cracks observed. Moerover, well electricity performance were showed by YSZDC and YSZDC-Cu0.02 at a testing temperature of 750°C,And the electrolyte conductivity didn’t decrease obviously with dopping CuO.

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Periodical:

Key Engineering Materials (Volumes 512-515)

Pages:

1564-1568

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.512-515.1564

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Online since:

June 2012

Authors:

Jia Song Zhang, Ye Fan Wu, Ling Hong Luo, Guo Yang Shen, Hui Su

Keywords:

CeO2 Doped 8YSZ, ES-SOFC, Low Temperature Sintering, Sintering Aid CuO

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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