Interface engineering of yttrium stabilized zirconia/gadolinium doped ceria bi-layer electrolyte solid oxide fuel cell for boosting electrochemical performance

Inyoung Jang; Sungmin Kim; Chanho Kim; Hyungjun Lee; Heesung Yoon; Taeseup Song; U. Paik

doi:10.1016/j.jpowsour.2019.226776

Interface engineering of yttrium stabilized zirconia/gadolinium doped ceria bi-layer electrolyte solid oxide fuel cell for boosting electrochemical performance

Inyoung Jang, Sungmin Kim, Chanho Kim, Hyungjun Lee, Heesung Yoon, Taeseup Song, U. Paik

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

42 Scopus citations

Abstract

La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ (LSCF) is a promising cathode material for solid oxide fuel cells due to its high oxygen reduction reaction (ORR) activity. A gadolinium-doped ceria (GDC) barrier layer is essential to preventing side reactions between LSCF and an yttrium-stabilized zirconia (YSZ) electrolyte. However, several challenges are associated with the coating of GDC barrier layer on the YSZ electrolyte, including delamination of the GDC layer due to sinterability differences and formation of an insulating layer at a high annealing temperature. In this study, we describe a structure for a newly designed interfacial layer consisting of a GDC barrier layer and a nano-web–structured LSCF thin-film layer (NW-LSCF) through a facile spin-coating method. A dense GDC barrier layer with a thickness of approximately 400 nm was successfully applied to the surface of a YSZ electrolyte without delamination at a low annealing temperature. The high surface area of the NW-LSCF enhanced ORR due to an increased triple-phase boundary length. Cells employing a GDC barrier layer and NW-LSCF interlayer exhibited improved electrochemical performance. Peak power density reached 1.29 W/cm² at an operating temperature of 550 °C and 2.14 W/cm² at 650 °C.

Original language	English
Article number	226776
Journal	Journal of Power Sources
Volume	435
DOIs	https://doi.org/10.1016/j.jpowsour.2019.226776
State	Published - Sep 30 2019
Externally published	Yes

Funding

This work was supported by the Korea Institute of Energy Technology Evaluation and Planning and the Ministry of Trade, Industry and Energy of the Republic of Korea (No. 20173010032290 ). This study was also supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) grant funded by the Korean government (Ministry of Science and ICT) (NRF- 2017M1A2A2044927 ). This work was supported by the Korea Institute of Energy Technology Evaluation and Planning and the Ministry of Trade, Industry and Energy of the Republic of Korea (No. 20173010032290). This study was also supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) grant funded by the Korean government (Ministry of Science and ICT) (NRF-2017M1A2A2044927).

Keywords

Bi-layer SOFC
GDC barrier layer
Interface engineering
Low temperature operation
Solid oxide fuel cell
Spin-coating

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10.1016/j.jpowsour.2019.226776

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title = "Interface engineering of yttrium stabilized zirconia/gadolinium doped ceria bi-layer electrolyte solid oxide fuel cell for boosting electrochemical performance",

abstract = "La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) is a promising cathode material for solid oxide fuel cells due to its high oxygen reduction reaction (ORR) activity. A gadolinium-doped ceria (GDC) barrier layer is essential to preventing side reactions between LSCF and an yttrium-stabilized zirconia (YSZ) electrolyte. However, several challenges are associated with the coating of GDC barrier layer on the YSZ electrolyte, including delamination of the GDC layer due to sinterability differences and formation of an insulating layer at a high annealing temperature. In this study, we describe a structure for a newly designed interfacial layer consisting of a GDC barrier layer and a nano-web–structured LSCF thin-film layer (NW-LSCF) through a facile spin-coating method. A dense GDC barrier layer with a thickness of approximately 400 nm was successfully applied to the surface of a YSZ electrolyte without delamination at a low annealing temperature. The high surface area of the NW-LSCF enhanced ORR due to an increased triple-phase boundary length. Cells employing a GDC barrier layer and NW-LSCF interlayer exhibited improved electrochemical performance. Peak power density reached 1.29 W/cm2 at an operating temperature of 550 °C and 2.14 W/cm2 at 650 °C.",

keywords = "Bi-layer SOFC, GDC barrier layer, Interface engineering, Low temperature operation, Solid oxide fuel cell, Spin-coating",

author = "Inyoung Jang and Sungmin Kim and Chanho Kim and Hyungjun Lee and Heesung Yoon and Taeseup Song and U. Paik",

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T1 - Interface engineering of yttrium stabilized zirconia/gadolinium doped ceria bi-layer electrolyte solid oxide fuel cell for boosting electrochemical performance

AU - Jang, Inyoung

AU - Kim, Sungmin

AU - Kim, Chanho

AU - Lee, Hyungjun

AU - Yoon, Heesung

AU - Song, Taeseup

AU - Paik, U.

PY - 2019/9/30

Y1 - 2019/9/30

N2 - La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) is a promising cathode material for solid oxide fuel cells due to its high oxygen reduction reaction (ORR) activity. A gadolinium-doped ceria (GDC) barrier layer is essential to preventing side reactions between LSCF and an yttrium-stabilized zirconia (YSZ) electrolyte. However, several challenges are associated with the coating of GDC barrier layer on the YSZ electrolyte, including delamination of the GDC layer due to sinterability differences and formation of an insulating layer at a high annealing temperature. In this study, we describe a structure for a newly designed interfacial layer consisting of a GDC barrier layer and a nano-web–structured LSCF thin-film layer (NW-LSCF) through a facile spin-coating method. A dense GDC barrier layer with a thickness of approximately 400 nm was successfully applied to the surface of a YSZ electrolyte without delamination at a low annealing temperature. The high surface area of the NW-LSCF enhanced ORR due to an increased triple-phase boundary length. Cells employing a GDC barrier layer and NW-LSCF interlayer exhibited improved electrochemical performance. Peak power density reached 1.29 W/cm2 at an operating temperature of 550 °C and 2.14 W/cm2 at 650 °C.

AB - La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) is a promising cathode material for solid oxide fuel cells due to its high oxygen reduction reaction (ORR) activity. A gadolinium-doped ceria (GDC) barrier layer is essential to preventing side reactions between LSCF and an yttrium-stabilized zirconia (YSZ) electrolyte. However, several challenges are associated with the coating of GDC barrier layer on the YSZ electrolyte, including delamination of the GDC layer due to sinterability differences and formation of an insulating layer at a high annealing temperature. In this study, we describe a structure for a newly designed interfacial layer consisting of a GDC barrier layer and a nano-web–structured LSCF thin-film layer (NW-LSCF) through a facile spin-coating method. A dense GDC barrier layer with a thickness of approximately 400 nm was successfully applied to the surface of a YSZ electrolyte without delamination at a low annealing temperature. The high surface area of the NW-LSCF enhanced ORR due to an increased triple-phase boundary length. Cells employing a GDC barrier layer and NW-LSCF interlayer exhibited improved electrochemical performance. Peak power density reached 1.29 W/cm2 at an operating temperature of 550 °C and 2.14 W/cm2 at 650 °C.

KW - Bi-layer SOFC

KW - GDC barrier layer

KW - Interface engineering

KW - Low temperature operation

KW - Solid oxide fuel cell

KW - Spin-coating

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JO - Journal of Power Sources

JF - Journal of Power Sources

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ER -

Interface engineering of yttrium stabilized zirconia/gadolinium doped ceria bi-layer electrolyte solid oxide fuel cell for boosting electrochemical performance

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