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High-performance solid oxide fuel cells with fiber-based cathodes for low-temperature operation

Parbey, Joseph ; Wang, Qin ; Lei, Jialong ; Espinoza-Andaluz, Mayken LU ; Hao, Feng ; Xiang, Yong ; Li, Tingshuai and Andersson, Martin LU (2020) In International Journal of Hydrogen Energy 45(11). p.6949-6957
Abstract

Low-temperature operation of solid oxide fuel cells (SOFCs) results in deterioration in electrochemical performance due to sluggish oxygen reduction reaction (ORR) at the cathode. To enhance the reaction pathway for ORR, La0.8Sr0.2MnO3 (LSM) nanofibers were fabricated by electrospinning and used for low-temperature solid oxide fuel cells operated at 600–700 °C. The morphological and structural characteristics show that the electrospun LSM nanofiber has a highly crystallized perovskite structure with a uniform elemental distribution. The average diameter of the LSM nanofiber after sintering is 380 nm. A symmetric cell of nanofiber-based LSM cathode on scandia-stabilized zirconia (SSZ) electrolyte pellet... (More)

Low-temperature operation of solid oxide fuel cells (SOFCs) results in deterioration in electrochemical performance due to sluggish oxygen reduction reaction (ORR) at the cathode. To enhance the reaction pathway for ORR, La0.8Sr0.2MnO3 (LSM) nanofibers were fabricated by electrospinning and used for low-temperature solid oxide fuel cells operated at 600–700 °C. The morphological and structural characteristics show that the electrospun LSM nanofiber has a highly crystallized perovskite structure with a uniform elemental distribution. The average diameter of the LSM nanofiber after sintering is 380 nm. A symmetric cell of nanofiber-based LSM cathode on scandia-stabilized zirconia (SSZ) electrolyte pellet exhibits much lower area specific resistances compared to commercial LSM powder-based cathode. A single cell based on the nanofiber LSM cathode on yttrium-doped barium cerate-zirconia (BCZY) electrolyte exhibits a power density of 0.35 Wcm−2 at 600 °C, which increases to 0.85 Wcm−2 at 700 °C. The cell has an area specific resistance (ASR) of 0.46 Ωcm2 at 600 °C, which decreases to 0.07 Ωcm2 at 700 °C. The results indicate that the LSM electrode fabricated by the electrospinning process produces a nanostructured porous electrode which optimizes the microstructure and significantly enhances the ORR at the cathode of SOFCs.

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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Area specific resistance, Electrochemical performance, Nanofiber, Oxygen reduction reaction, Solid oxide fuel cell
in
International Journal of Hydrogen Energy
volume
45
issue
11
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:85077920650
ISSN
0360-3199
DOI
10.1016/j.ijhydene.2019.12.125
language
English
LU publication?
yes
id
8a6015ad-6ba1-4ac7-ae6b-7526093235db
date added to LUP
2020-01-29 15:12:37
date last changed
2022-04-18 20:10:29
@article{8a6015ad-6ba1-4ac7-ae6b-7526093235db,
  abstract     = {{<p>Low-temperature operation of solid oxide fuel cells (SOFCs) results in deterioration in electrochemical performance due to sluggish oxygen reduction reaction (ORR) at the cathode. To enhance the reaction pathway for ORR, La<sub>0.8</sub>Sr<sub>0.2</sub>MnO<sub>3</sub> (LSM) nanofibers were fabricated by electrospinning and used for low-temperature solid oxide fuel cells operated at 600–700 °C. The morphological and structural characteristics show that the electrospun LSM nanofiber has a highly crystallized perovskite structure with a uniform elemental distribution. The average diameter of the LSM nanofiber after sintering is 380 nm. A symmetric cell of nanofiber-based LSM cathode on scandia-stabilized zirconia (SSZ) electrolyte pellet exhibits much lower area specific resistances compared to commercial LSM powder-based cathode. A single cell based on the nanofiber LSM cathode on yttrium-doped barium cerate-zirconia (BCZY) electrolyte exhibits a power density of 0.35 Wcm<sup>−2</sup> at 600 °C, which increases to 0.85 Wcm<sup>−2</sup> at 700 °C. The cell has an area specific resistance (ASR) of 0.46 Ωcm<sup>2</sup> at 600 °C, which decreases to 0.07 Ωcm<sup>2</sup> at 700 °C. The results indicate that the LSM electrode fabricated by the electrospinning process produces a nanostructured porous electrode which optimizes the microstructure and significantly enhances the ORR at the cathode of SOFCs.</p>}},
  author       = {{Parbey, Joseph and Wang, Qin and Lei, Jialong and Espinoza-Andaluz, Mayken and Hao, Feng and Xiang, Yong and Li, Tingshuai and Andersson, Martin}},
  issn         = {{0360-3199}},
  keywords     = {{Area specific resistance; Electrochemical performance; Nanofiber; Oxygen reduction reaction; Solid oxide fuel cell}},
  language     = {{eng}},
  month        = {{02}},
  number       = {{11}},
  pages        = {{6949--6957}},
  publisher    = {{Elsevier}},
  series       = {{International Journal of Hydrogen Energy}},
  title        = {{High-performance solid oxide fuel cells with fiber-based cathodes for low-temperature operation}},
  url          = {{http://dx.doi.org/10.1016/j.ijhydene.2019.12.125}},
  doi          = {{10.1016/j.ijhydene.2019.12.125}},
  volume       = {{45}},
  year         = {{2020}},
}