Enhancement of oxygen reduction reaction through coating a nano-web-structured La0.6Sr0.4Co0.2Fe0.8O3-Δ thin-film as a cathode/electrolyte interfacial layer for lowering the operating temperature of solid oxide fuel cells

Inyoung Jang; Sungmin Kim; Chanho Kim; Heesung Yoon; Taeseup Song

doi:10.1016/j.jpowsour.2018.04.106

Enhancement of oxygen reduction reaction through coating a nano-web-structured La_0.6Sr_0.4Co_0.2Fe_0.8O_3-Δ thin-film as a cathode/electrolyte interfacial layer for lowering the operating temperature of solid oxide fuel cells

Inyoung Jang
, Sungmin Kim
, Chanho Kim
, Heesung Yoon
, Taeseup Song

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

28 Scopus citations

Abstract

Lowering operation temperature of the solid oxide fuel cell is critical to improving its reliability and durability. However, the tradeoff between the operation temperature and the oxygen reduction reaction on the cathode side hinders lowering of the operation temperature. To address this issue, we employ a nano-web-structured La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ (NW-LSCF) thin-film layer as an interlayer on the cathode side. This thin-film layer enables operating the cell at a low temperature with enhancement of the electrochemical performance by increasing the oxygen-reduction reaction site and is fabricated via a simple spin-coating method. The large surface area of NW-LSCF enables significant improvement in the oxygen reduction reaction by an increased triple-phase boundary. In addition, the adhesion property between the gadolinium-doped ceria electrolyte and cathode is improved by the layer. In an anode-support-type single cell test, the peak power density of the cell with NW-LSCF is 0.57 W/cm² at 550 °C, which is an approximately 63% improvement compared to that of the cell without NW-LSCF. Moreover, the value is comparable to the peak power density of the cell without NW-LSCF operating at 600 °C. This finding suggests the possibility of lowering the operating temperature of the solid oxide fuel cell by introducing NW-LSCF into the cell.

Original language	English
Pages (from-to)	123-128
Number of pages	6
Journal	Journal of Power Sources
Volume	392
DOIs	https://doi.org/10.1016/j.jpowsour.2018.04.106
State	Published - Jul 15 2018
Externally published	Yes

Funding

This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea (No. 20153030031480). 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 (KETEP) and the Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea (No. 20153030031480 ). 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

LaSrCoFeO
Nano-web-structured thin-film layer
Solid oxide fuel cell
Spin-coating

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@article{fb1bb8e2ce1c41ca86fe1727e84f0b31,

title = "Enhancement of oxygen reduction reaction through coating a nano-web-structured La0.6Sr0.4Co0.2Fe0.8O3-Δ thin-film as a cathode/electrolyte interfacial layer for lowering the operating temperature of solid oxide fuel cells",

abstract = "Lowering operation temperature of the solid oxide fuel cell is critical to improving its reliability and durability. However, the tradeoff between the operation temperature and the oxygen reduction reaction on the cathode side hinders lowering of the operation temperature. To address this issue, we employ a nano-web-structured La0.6Sr0.4Co0.2Fe0.8O3-δ (NW-LSCF) thin-film layer as an interlayer on the cathode side. This thin-film layer enables operating the cell at a low temperature with enhancement of the electrochemical performance by increasing the oxygen-reduction reaction site and is fabricated via a simple spin-coating method. The large surface area of NW-LSCF enables significant improvement in the oxygen reduction reaction by an increased triple-phase boundary. In addition, the adhesion property between the gadolinium-doped ceria electrolyte and cathode is improved by the layer. In an anode-support-type single cell test, the peak power density of the cell with NW-LSCF is 0.57 W/cm2 at 550 °C, which is an approximately 63\% improvement compared to that of the cell without NW-LSCF. Moreover, the value is comparable to the peak power density of the cell without NW-LSCF operating at 600 °C. This finding suggests the possibility of lowering the operating temperature of the solid oxide fuel cell by introducing NW-LSCF into the cell.",

keywords = "LaSrCoFeO, Nano-web-structured thin-film layer, Solid oxide fuel cell, Spin-coating",

author = "Inyoung Jang and Sungmin Kim and Chanho Kim and Heesung Yoon and Taeseup Song",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = jul,

day = "15",

doi = "10.1016/j.jpowsour.2018.04.106",

language = "English",

volume = "392",

pages = "123--128",

journal = "Journal of Power Sources",

issn = "0378-7753",

publisher = "Elsevier",

}

Jang, I, Kim, S, Kim, C, Yoon, H & Song, T 2018, 'Enhancement of oxygen reduction reaction through coating a nano-web-structured La_0.6Sr_0.4Co_0.2Fe_0.8O_3-Δ thin-film as a cathode/electrolyte interfacial layer for lowering the operating temperature of solid oxide fuel cells', Journal of Power Sources, vol. 392, pp. 123-128. https://doi.org/10.1016/j.jpowsour.2018.04.106

Enhancement of oxygen reduction reaction through coating a nano-web-structured La_0.6Sr_0.4Co_0.2Fe_0.8O_3-Δ thin-film as a cathode/electrolyte interfacial layer for lowering the operating temperature of solid oxide fuel cells. / Jang, Inyoung; Kim, Sungmin; Kim, Chanho et al.
In: Journal of Power Sources, Vol. 392, 15.07.2018, p. 123-128.

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

TY - JOUR

T1 - Enhancement of oxygen reduction reaction through coating a nano-web-structured La0.6Sr0.4Co0.2Fe0.8O3-Δ thin-film as a cathode/electrolyte interfacial layer for lowering the operating temperature of solid oxide fuel cells

AU - Jang, Inyoung

AU - Kim, Sungmin

AU - Kim, Chanho

AU - Yoon, Heesung

AU - Song, Taeseup

PY - 2018/7/15

Y1 - 2018/7/15

N2 - Lowering operation temperature of the solid oxide fuel cell is critical to improving its reliability and durability. However, the tradeoff between the operation temperature and the oxygen reduction reaction on the cathode side hinders lowering of the operation temperature. To address this issue, we employ a nano-web-structured La0.6Sr0.4Co0.2Fe0.8O3-δ (NW-LSCF) thin-film layer as an interlayer on the cathode side. This thin-film layer enables operating the cell at a low temperature with enhancement of the electrochemical performance by increasing the oxygen-reduction reaction site and is fabricated via a simple spin-coating method. The large surface area of NW-LSCF enables significant improvement in the oxygen reduction reaction by an increased triple-phase boundary. In addition, the adhesion property between the gadolinium-doped ceria electrolyte and cathode is improved by the layer. In an anode-support-type single cell test, the peak power density of the cell with NW-LSCF is 0.57 W/cm2 at 550 °C, which is an approximately 63% improvement compared to that of the cell without NW-LSCF. Moreover, the value is comparable to the peak power density of the cell without NW-LSCF operating at 600 °C. This finding suggests the possibility of lowering the operating temperature of the solid oxide fuel cell by introducing NW-LSCF into the cell.

AB - Lowering operation temperature of the solid oxide fuel cell is critical to improving its reliability and durability. However, the tradeoff between the operation temperature and the oxygen reduction reaction on the cathode side hinders lowering of the operation temperature. To address this issue, we employ a nano-web-structured La0.6Sr0.4Co0.2Fe0.8O3-δ (NW-LSCF) thin-film layer as an interlayer on the cathode side. This thin-film layer enables operating the cell at a low temperature with enhancement of the electrochemical performance by increasing the oxygen-reduction reaction site and is fabricated via a simple spin-coating method. The large surface area of NW-LSCF enables significant improvement in the oxygen reduction reaction by an increased triple-phase boundary. In addition, the adhesion property between the gadolinium-doped ceria electrolyte and cathode is improved by the layer. In an anode-support-type single cell test, the peak power density of the cell with NW-LSCF is 0.57 W/cm2 at 550 °C, which is an approximately 63% improvement compared to that of the cell without NW-LSCF. Moreover, the value is comparable to the peak power density of the cell without NW-LSCF operating at 600 °C. This finding suggests the possibility of lowering the operating temperature of the solid oxide fuel cell by introducing NW-LSCF into the cell.

KW - LaSrCoFeO

KW - Nano-web-structured thin-film layer

KW - Solid oxide fuel cell

KW - Spin-coating

UR - https://www.scopus.com/pages/publications/85046692155

U2 - 10.1016/j.jpowsour.2018.04.106

DO - 10.1016/j.jpowsour.2018.04.106

M3 - Article

AN - SCOPUS:85046692155

SN - 0378-7753

VL - 392

SP - 123

EP - 128

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -