Nanoporous silver cathode surface treated by atomic layer deposition of CeO x for low-temperature solid oxide fuel cells

Ke Chean Neoh; Gwon Deok Han; Manjin Kim; Jun Woo Kim; Hyung Jong Choi; Suk Won Park; Joon Hyung Shim

doi:10.1088/0957-4484/27/18/185403

Nanoporous silver cathode surface treated by atomic layer deposition of CeO _x for low-temperature solid oxide fuel cells

Ke Chean Neoh, Gwon Deok Han, Manjin Kim, Jun Woo Kim, Hyung Jong Choi, Suk Won Park, Joon Hyung Shim

School of Mechanical Engineering

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

31 Citations (Scopus)

Abstract

We evaluated the performance of solid oxide fuel cells (SOFCs) with a 50 nm thin silver (Ag) cathode surface treated with cerium oxide (CeO _x ) by atomic layer deposition (ALD). The performances of bare and ALD-treated Ag cathodes were evaluated on gadolinia-doped ceria (GDC) electrolyte supporting cells with a platinum (Pt) anode over 300 °C-450 °C. Our work confirms that ALD CeO _x treatment enhances cathodic performance and thermal stability of the Ag cathode. The performance difference between cells using a Ag cathode optimally treated with an ALD CeO _x surface and a reference Pt cathode is about 50% at 450 °C in terms of fuel cell power output in our experiment. The bare Ag cathode completely agglomerated into islands during fuel cell operation at 450 °C, while the ALD CeO _x treatment effectively protects the porosity of the cathode. We also discuss the long-term stability of ALD CeO _x -treated Ag cathodes related to the microstructure of the layers.

Original language	English
Article number	185403
Journal	Nanotechnology
Volume	27
Issue number	18
DOIs	https://doi.org/10.1088/0957-4484/27/18/185403
Publication status	Published - 2016 Mar 24

Keywords

Ag
atomic layer deposition
cathode
ceria
low temperature
solid oxide fuel cell

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

Access to Document

10.1088/0957-4484/27/18/185403

Cite this

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title = "Nanoporous silver cathode surface treated by atomic layer deposition of CeO x for low-temperature solid oxide fuel cells",

abstract = "We evaluated the performance of solid oxide fuel cells (SOFCs) with a 50 nm thin silver (Ag) cathode surface treated with cerium oxide (CeO x ) by atomic layer deposition (ALD). The performances of bare and ALD-treated Ag cathodes were evaluated on gadolinia-doped ceria (GDC) electrolyte supporting cells with a platinum (Pt) anode over 300 °C-450 °C. Our work confirms that ALD CeO x treatment enhances cathodic performance and thermal stability of the Ag cathode. The performance difference between cells using a Ag cathode optimally treated with an ALD CeO x surface and a reference Pt cathode is about 50% at 450 °C in terms of fuel cell power output in our experiment. The bare Ag cathode completely agglomerated into islands during fuel cell operation at 450 °C, while the ALD CeO x treatment effectively protects the porosity of the cathode. We also discuss the long-term stability of ALD CeO x -treated Ag cathodes related to the microstructure of the layers.",

keywords = "Ag, atomic layer deposition, cathode, ceria, low temperature, solid oxide fuel cell",

author = "Neoh, {Ke Chean} and Han, {Gwon Deok} and Manjin Kim and Kim, {Jun Woo} and Choi, {Hyung Jong} and Park, {Suk Won} and Shim, {Joon Hyung}",

note = "Funding Information: This work was supported by a National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MSIP) (Grant No. NRF-2013R1A1A1A05013794). The Brain Korea 21 Plus program (Grant No. 21A20131712520) is also acknowledged for their support. We would also like to thank Dr C Lansalot-Matras and Dr W Noh (Air Liquide Laboratories Korea) for the supplement on the Ce precursor and a discussion on the ALD CeOx process.",

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AU - Neoh, Ke Chean

AU - Han, Gwon Deok

AU - Kim, Manjin

AU - Kim, Jun Woo

AU - Choi, Hyung Jong

AU - Park, Suk Won

AU - Shim, Joon Hyung

N1 - Funding Information: This work was supported by a National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MSIP) (Grant No. NRF-2013R1A1A1A05013794). The Brain Korea 21 Plus program (Grant No. 21A20131712520) is also acknowledged for their support. We would also like to thank Dr C Lansalot-Matras and Dr W Noh (Air Liquide Laboratories Korea) for the supplement on the Ce precursor and a discussion on the ALD CeOx process.

PY - 2016/3/24

Y1 - 2016/3/24

N2 - We evaluated the performance of solid oxide fuel cells (SOFCs) with a 50 nm thin silver (Ag) cathode surface treated with cerium oxide (CeO x ) by atomic layer deposition (ALD). The performances of bare and ALD-treated Ag cathodes were evaluated on gadolinia-doped ceria (GDC) electrolyte supporting cells with a platinum (Pt) anode over 300 °C-450 °C. Our work confirms that ALD CeO x treatment enhances cathodic performance and thermal stability of the Ag cathode. The performance difference between cells using a Ag cathode optimally treated with an ALD CeO x surface and a reference Pt cathode is about 50% at 450 °C in terms of fuel cell power output in our experiment. The bare Ag cathode completely agglomerated into islands during fuel cell operation at 450 °C, while the ALD CeO x treatment effectively protects the porosity of the cathode. We also discuss the long-term stability of ALD CeO x -treated Ag cathodes related to the microstructure of the layers.

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