Nanofiber-based composite cathodes for intermediate temperature solid oxide fuel cells

Minwoo Ahn; Jongseo Lee; Wonyoung Lee

doi:10.1016/j.jpowsour.2017.03.151

Nanofiber-based composite cathodes for intermediate temperature solid oxide fuel cells

Minwoo Ahn
, Jongseo Lee
, Wonyoung Lee

Department of Mechanical Engineering

Sungkyunkwan University

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

58 Scopus citations

Abstract

We demonstrate the Sm_0.5Sr_0.5CoO_3-δ (SSC) nanofiber-based composite cathodes for intermediate temperature solid oxide fuel cells (IT-SOFCs), showing a cathode area-specific resistance (ASR) value of 0.024 Ωcm² at 650 °C. The hollow and porous SSC nanofiber layer, fabricated by electrospinning, is sintered at low temperatures to preserve the high specific surface area for facile oxygen surface exchange reactions. The low sintering temperature is enabled by additional SSC powder layer, providing sufficient adhesion between the electrolyte and the nanofiber layer. Our results can provide a design guideline to fully utilize the nanostructured electrodes by engineering the structural properties of the surface and the interface, and hence high-performance IT-SOFCs can be achieved by structural modification with conventional materials.

Original language	English
Pages (from-to)	176-182
Number of pages	7
Journal	Journal of Power Sources
Volume	353
DOIs	https://doi.org/10.1016/j.jpowsour.2017.03.151
State	Published - 2017

Keywords

Adhesion
Electrode
Low sintering temperature
Nanofibers
Solid oxide fuel cells
Surface area

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jpowsour.2017.03.151

Cite this

@article{3b7de7c60b414a9f8e5259f3cce19037,

title = "Nanofiber-based composite cathodes for intermediate temperature solid oxide fuel cells",

abstract = "We demonstrate the Sm0.5Sr0.5CoO3-δ (SSC) nanofiber-based composite cathodes for intermediate temperature solid oxide fuel cells (IT-SOFCs), showing a cathode area-specific resistance (ASR) value of 0.024 Ωcm2 at 650 °C. The hollow and porous SSC nanofiber layer, fabricated by electrospinning, is sintered at low temperatures to preserve the high specific surface area for facile oxygen surface exchange reactions. The low sintering temperature is enabled by additional SSC powder layer, providing sufficient adhesion between the electrolyte and the nanofiber layer. Our results can provide a design guideline to fully utilize the nanostructured electrodes by engineering the structural properties of the surface and the interface, and hence high-performance IT-SOFCs can be achieved by structural modification with conventional materials.",

keywords = "Adhesion, Electrode, Low sintering temperature, Nanofibers, Solid oxide fuel cells, Surface area",

author = "Minwoo Ahn and Jongseo Lee and Wonyoung Lee",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

doi = "10.1016/j.jpowsour.2017.03.151",

language = "English",

volume = "353",

pages = "176--182",

journal = "Journal of Power Sources",

issn = "0378-7753",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Nanofiber-based composite cathodes for intermediate temperature solid oxide fuel cells

AU - Ahn, Minwoo

AU - Lee, Jongseo

AU - Lee, Wonyoung

PY - 2017

Y1 - 2017

N2 - We demonstrate the Sm0.5Sr0.5CoO3-δ (SSC) nanofiber-based composite cathodes for intermediate temperature solid oxide fuel cells (IT-SOFCs), showing a cathode area-specific resistance (ASR) value of 0.024 Ωcm2 at 650 °C. The hollow and porous SSC nanofiber layer, fabricated by electrospinning, is sintered at low temperatures to preserve the high specific surface area for facile oxygen surface exchange reactions. The low sintering temperature is enabled by additional SSC powder layer, providing sufficient adhesion between the electrolyte and the nanofiber layer. Our results can provide a design guideline to fully utilize the nanostructured electrodes by engineering the structural properties of the surface and the interface, and hence high-performance IT-SOFCs can be achieved by structural modification with conventional materials.

AB - We demonstrate the Sm0.5Sr0.5CoO3-δ (SSC) nanofiber-based composite cathodes for intermediate temperature solid oxide fuel cells (IT-SOFCs), showing a cathode area-specific resistance (ASR) value of 0.024 Ωcm2 at 650 °C. The hollow and porous SSC nanofiber layer, fabricated by electrospinning, is sintered at low temperatures to preserve the high specific surface area for facile oxygen surface exchange reactions. The low sintering temperature is enabled by additional SSC powder layer, providing sufficient adhesion between the electrolyte and the nanofiber layer. Our results can provide a design guideline to fully utilize the nanostructured electrodes by engineering the structural properties of the surface and the interface, and hence high-performance IT-SOFCs can be achieved by structural modification with conventional materials.

KW - Adhesion

KW - Electrode

KW - Low sintering temperature

KW - Nanofibers

KW - Solid oxide fuel cells

KW - Surface area

UR - https://www.scopus.com/pages/publications/85017132701

U2 - 10.1016/j.jpowsour.2017.03.151

DO - 10.1016/j.jpowsour.2017.03.151

M3 - Article

AN - SCOPUS:85017132701

SN - 0378-7753

VL - 353

SP - 176

EP - 182

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -

Nanofiber-based composite cathodes for intermediate temperature solid oxide fuel cells

Abstract

Keywords

UN SDGs

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