NDLI: The phase stability and conductivity of Ho$_{2}$O$_{3}$–Gd$_{2}$O$_{3}$ co-doped electrolyte for solid oxide fuel cell

Content Provider	Springer Nature Link
Author	Çorumlu, Vahit Ermiş, İsmail Acer, Semra D. Çifci, Tuğba Dağdemir, Yılmaz Ari, Mehmet
Copyright Year	2016
Abstract	In this study, Bi$_{2}$O$_{3}$ ternary system sample materials were synthesized by using solid state reaction method. Two oxides, Ho$_{2}$O$_{3}$ and Gd$_{2}$O$_{3}$, were used to stabilize the δ (cubic) Bi$_{2}$O$_{3}$ phase used as an electrolyte of solid oxide fuel cell applications. The characteristics and electrical properties of these electrolyte samples for solid oxide fuel cells were evaluated by X-ray diffraction (XRD), scanning electron microscope and the four-point probe technique. According to XRD measurements, δ-phase (x = 0.05–0.1, y = 0.05, 0.1, 0.15, 0.2) samples were obtained with a stable structure. The results of the electrical measurements of the (Bi$_{2}$O$_{3}$)$_{1−x−y}$(Ho$_{2}$O$_{3}$)$_{x}$(Gd$_{2}$O$_{3}$)$_{y}$ ternary system show that the electrical conductivity increase with decreasing amount of Gd$_{2}$O$_{3}$ molar ratio at a fixed molar ratio of Ho$_{2}$O$_{3}$. The value of highest conductivity was found as 2.53 × 10$^{−1}$ S cm$^{−1}$ for the (Bi$_{2}$O$_{3}$)$_{1−x−y}$(Ho$_{2}$O$_{3}$)$_{x}$(Gd$_{2}$O$_{3}$)$_{y}$ ternary system (x = 0.05 mol% and y = 0.05 mol%) at 973 K. It was found that activation energy at low temperature varied from 1.10 to 1.29 eV and the activation energy at high temperature varied from 0.61 to 0.70 eV.
Starting Page	5839
Ending Page	5845
Page Count	7
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	27
Issue Number	6
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2016-02-12
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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