Characterization of yttrium-doped ceria with various yttrium concentrations as cathode interlayers of SOFCs

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This study focuses on enhancing the efficiency of solid oxide fuel cells (SOFCs) by modulating the thickness of the highly resistive solid solution layer of (Ce,Zr)O2 formed between the yttria-stabilized zirconia (YSZ) electrolyte and the CeO2-based interlayer on the cathode side. The effects of the concentration of dopant in CeO2 on the thickness of the solid solution were analyzed. Yttrium-doped CeO2 (YDC) interlayers were studied, with dopant concentrations in the range of 5–40 mol%. The results revealed that the thickness of the solid solution decreased with increasing dopant concentration up to 20 mol% and then saturated at higher dopant concentrations. In addition, the electrical conductivities of yttrium-doped ceria (YDC) and the solid solution of YSZ and YDC were measured. YDC with a dopant concentration of 20 mol% exhibited the highest conductivity. The conductivities of the YSZ/YDC solid solution decreased compared to those of YDC and YSZ for each dopant concentration, and the extent of the reductions was approximately the same for all dopant concentrations. These results indicate that a dopant concentration of 20 mol% is optimal to minimize the internal resistance of SOFCs when YDC is used as the interlayer material.

Original languageEnglish
Pages (from-to)95-103
Number of pages9
JournalIonics
Volume23
Issue number1
DOIs
Publication statusPublished - Jan 1 2017

Fingerprint

Yttrium
Cerium compounds
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
yttrium
interlayers
Cathodes
cathodes
Doping (additives)
Yttria stabilized zirconia
Solid solutions
yttria-stabilized zirconia
solid solutions
conductivity
Electrolytes
electrolytes
electrical resistivity

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Characterization of yttrium-doped ceria with various yttrium concentrations as cathode interlayers of SOFCs. / Somekawa, T.; Matsuzaki, Y.; Tachikawa, Yuya; Taniguchi, Shunsuke; Sasaki, Kazunari.

In: Ionics, Vol. 23, No. 1, 01.01.2017, p. 95-103.

Research output: Contribution to journalArticle

@article{b48d77fb52ad4c29addf641b2496832e,
title = "Characterization of yttrium-doped ceria with various yttrium concentrations as cathode interlayers of SOFCs",
abstract = "This study focuses on enhancing the efficiency of solid oxide fuel cells (SOFCs) by modulating the thickness of the highly resistive solid solution layer of (Ce,Zr)O2 formed between the yttria-stabilized zirconia (YSZ) electrolyte and the CeO2-based interlayer on the cathode side. The effects of the concentration of dopant in CeO2 on the thickness of the solid solution were analyzed. Yttrium-doped CeO2 (YDC) interlayers were studied, with dopant concentrations in the range of 5–40 mol{\%}. The results revealed that the thickness of the solid solution decreased with increasing dopant concentration up to 20 mol{\%} and then saturated at higher dopant concentrations. In addition, the electrical conductivities of yttrium-doped ceria (YDC) and the solid solution of YSZ and YDC were measured. YDC with a dopant concentration of 20 mol{\%} exhibited the highest conductivity. The conductivities of the YSZ/YDC solid solution decreased compared to those of YDC and YSZ for each dopant concentration, and the extent of the reductions was approximately the same for all dopant concentrations. These results indicate that a dopant concentration of 20 mol{\%} is optimal to minimize the internal resistance of SOFCs when YDC is used as the interlayer material.",
author = "T. Somekawa and Y. Matsuzaki and Yuya Tachikawa and Shunsuke Taniguchi and Kazunari Sasaki",
year = "2017",
month = "1",
day = "1",
doi = "10.1007/s11581-016-1816-9",
language = "English",
volume = "23",
pages = "95--103",
journal = "Ionics",
issn = "0947-7047",
publisher = "Institute for Ionics",
number = "1",

}

TY - JOUR

T1 - Characterization of yttrium-doped ceria with various yttrium concentrations as cathode interlayers of SOFCs

AU - Somekawa, T.

AU - Matsuzaki, Y.

AU - Tachikawa, Yuya

AU - Taniguchi, Shunsuke

AU - Sasaki, Kazunari

PY - 2017/1/1

Y1 - 2017/1/1

N2 - This study focuses on enhancing the efficiency of solid oxide fuel cells (SOFCs) by modulating the thickness of the highly resistive solid solution layer of (Ce,Zr)O2 formed between the yttria-stabilized zirconia (YSZ) electrolyte and the CeO2-based interlayer on the cathode side. The effects of the concentration of dopant in CeO2 on the thickness of the solid solution were analyzed. Yttrium-doped CeO2 (YDC) interlayers were studied, with dopant concentrations in the range of 5–40 mol%. The results revealed that the thickness of the solid solution decreased with increasing dopant concentration up to 20 mol% and then saturated at higher dopant concentrations. In addition, the electrical conductivities of yttrium-doped ceria (YDC) and the solid solution of YSZ and YDC were measured. YDC with a dopant concentration of 20 mol% exhibited the highest conductivity. The conductivities of the YSZ/YDC solid solution decreased compared to those of YDC and YSZ for each dopant concentration, and the extent of the reductions was approximately the same for all dopant concentrations. These results indicate that a dopant concentration of 20 mol% is optimal to minimize the internal resistance of SOFCs when YDC is used as the interlayer material.

AB - This study focuses on enhancing the efficiency of solid oxide fuel cells (SOFCs) by modulating the thickness of the highly resistive solid solution layer of (Ce,Zr)O2 formed between the yttria-stabilized zirconia (YSZ) electrolyte and the CeO2-based interlayer on the cathode side. The effects of the concentration of dopant in CeO2 on the thickness of the solid solution were analyzed. Yttrium-doped CeO2 (YDC) interlayers were studied, with dopant concentrations in the range of 5–40 mol%. The results revealed that the thickness of the solid solution decreased with increasing dopant concentration up to 20 mol% and then saturated at higher dopant concentrations. In addition, the electrical conductivities of yttrium-doped ceria (YDC) and the solid solution of YSZ and YDC were measured. YDC with a dopant concentration of 20 mol% exhibited the highest conductivity. The conductivities of the YSZ/YDC solid solution decreased compared to those of YDC and YSZ for each dopant concentration, and the extent of the reductions was approximately the same for all dopant concentrations. These results indicate that a dopant concentration of 20 mol% is optimal to minimize the internal resistance of SOFCs when YDC is used as the interlayer material.

UR - http://www.scopus.com/inward/record.url?scp=84986245767&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84986245767&partnerID=8YFLogxK

U2 - 10.1007/s11581-016-1816-9

DO - 10.1007/s11581-016-1816-9

M3 - Article

AN - SCOPUS:84986245767

VL - 23

SP - 95

EP - 103

JO - Ionics

JF - Ionics

SN - 0947-7047

IS - 1

ER -