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

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 Y_0.08Zr_0.72Ce_0.2O_1.6 (YSZDC) and Y_0.08Zr_0.72Ce_0.18Cu _0.02O_1.6-δ(YSZDC-Cu_0.02) possessed similar powder characteristics, including cubic fluorite crystalline structure.About 150 °C reduction in densification temperature of Y_0.08Zr_0.72Ce_0.18Cu_0.02O_1.6-δ was obtained when compared with Y_0.08Zr_0.72Ce_0.2O_1.6.The YSZDC-Cu_0.02 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-Cu_0.02 at a testing temperature of 750°C,And the electrolyte conductivity didn’t decrease obviously with dopping CuO.

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 1564-1568
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.1564
• 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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