Compositional optimization of gadolinia-doped ceria treatment for enhanced oxygen reduction kinetics in low-temperature solid oxide fuel cells

Jun Woo Kim; Dong Young Jang; Manjin Kim; Heonjae Jeong; Namkeun Kim; Joon Hyung Shim

doi:10.1016/j.tsf.2017.01.004

Compositional optimization of gadolinia-doped ceria treatment for enhanced oxygen reduction kinetics in low-temperature solid oxide fuel cells

Jun Woo Kim, Dong Young Jang, Manjin Kim, Heonjae Jeong, Namkeun Kim, Joon Hyung Shim

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

We report the optimization of the dopant concentration of gadolinia-doped ceria (GDC) to enhance the oxygen reduction reaction (ORR) kinetics for low-temperature solid oxide fuel cells (LTSOFCs). Crystalline GDC layers with uniform nano-granular structures were prepared by aerosol-assisted chemical vapor deposition (AACVD) on the cathode side of a GDC electrolyte. The current-voltage (I–V) characteristics and power performances of the AACVD GDC-treated cells were measured and their cathodic reactions were analyzed by electrochemical impedance spectroscopy (EIS) to investigate the effect of GDC treatments with various dopant compositions. The cell treated with Gd_0.14Ce_0.86O_2-δ was found to show an optimized power performance with the best ORR kinetics, due to its nano-granular structure and high concentration of oxygen vacancies.

Original language	English
Pages (from-to)	95-100
Number of pages	6
Journal	Thin Solid Films
Volume	624
DOIs	https://doi.org/10.1016/j.tsf.2017.01.004
Publication status	Published - 2017 Feb 28

Keywords

Aerosol-assisted chemical vapor deposition
Gadolinia-doped ceria
Low-temperature solid oxide fuel cells
Oxygen reduction reaction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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10.1016/j.tsf.2017.01.004

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@article{5c08de3357ad41c3a2a4273395a31058,

title = "Compositional optimization of gadolinia-doped ceria treatment for enhanced oxygen reduction kinetics in low-temperature solid oxide fuel cells",

abstract = "We report the optimization of the dopant concentration of gadolinia-doped ceria (GDC) to enhance the oxygen reduction reaction (ORR) kinetics for low-temperature solid oxide fuel cells (LTSOFCs). Crystalline GDC layers with uniform nano-granular structures were prepared by aerosol-assisted chemical vapor deposition (AACVD) on the cathode side of a GDC electrolyte. The current-voltage (I–V) characteristics and power performances of the AACVD GDC-treated cells were measured and their cathodic reactions were analyzed by electrochemical impedance spectroscopy (EIS) to investigate the effect of GDC treatments with various dopant compositions. The cell treated with Gd0.14Ce0.86O2-δ was found to show an optimized power performance with the best ORR kinetics, due to its nano-granular structure and high concentration of oxygen vacancies.",

keywords = "Aerosol-assisted chemical vapor deposition, Gadolinia-doped ceria, Low-temperature solid oxide fuel cells, Oxygen reduction reaction",

author = "Kim, {Jun Woo} and Jang, {Dong Young} and Manjin Kim and Heonjae Jeong and Namkeun Kim and Shim, {Joon Hyung}",

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doi = "10.1016/j.tsf.2017.01.004",

language = "English",

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T1 - Compositional optimization of gadolinia-doped ceria treatment for enhanced oxygen reduction kinetics in low-temperature solid oxide fuel cells

AU - Kim, Jun Woo

AU - Jang, Dong Young

AU - Kim, Manjin

AU - Jeong, Heonjae

AU - Kim, Namkeun

AU - Shim, Joon Hyung

PY - 2017/2/28

Y1 - 2017/2/28

N2 - We report the optimization of the dopant concentration of gadolinia-doped ceria (GDC) to enhance the oxygen reduction reaction (ORR) kinetics for low-temperature solid oxide fuel cells (LTSOFCs). Crystalline GDC layers with uniform nano-granular structures were prepared by aerosol-assisted chemical vapor deposition (AACVD) on the cathode side of a GDC electrolyte. The current-voltage (I–V) characteristics and power performances of the AACVD GDC-treated cells were measured and their cathodic reactions were analyzed by electrochemical impedance spectroscopy (EIS) to investigate the effect of GDC treatments with various dopant compositions. The cell treated with Gd0.14Ce0.86O2-δ was found to show an optimized power performance with the best ORR kinetics, due to its nano-granular structure and high concentration of oxygen vacancies.

AB - We report the optimization of the dopant concentration of gadolinia-doped ceria (GDC) to enhance the oxygen reduction reaction (ORR) kinetics for low-temperature solid oxide fuel cells (LTSOFCs). Crystalline GDC layers with uniform nano-granular structures were prepared by aerosol-assisted chemical vapor deposition (AACVD) on the cathode side of a GDC electrolyte. The current-voltage (I–V) characteristics and power performances of the AACVD GDC-treated cells were measured and their cathodic reactions were analyzed by electrochemical impedance spectroscopy (EIS) to investigate the effect of GDC treatments with various dopant compositions. The cell treated with Gd0.14Ce0.86O2-δ was found to show an optimized power performance with the best ORR kinetics, due to its nano-granular structure and high concentration of oxygen vacancies.

KW - Aerosol-assisted chemical vapor deposition

KW - Gadolinia-doped ceria

KW - Low-temperature solid oxide fuel cells

KW - Oxygen reduction reaction

UR - http://www.scopus.com/inward/record.url?scp=85010430660&partnerID=8YFLogxK

U2 - 10.1016/j.tsf.2017.01.004

DO - 10.1016/j.tsf.2017.01.004

M3 - Article

AN - SCOPUS:85010430660

SN - 0040-6090

VL - 624

SP - 95

EP - 100

JO - Thin Solid Films

JF - Thin Solid Films

ER -

Compositional optimization of gadolinia-doped ceria treatment for enhanced oxygen reduction kinetics in low-temperature solid oxide fuel cells

Abstract

Keywords

ASJC Scopus subject areas

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