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

Joseph PARBEY, Qin WANG, Jialong LEI, Mayken ESPINOZA-ANDALUZ, Feng HAO, Yong XIANG, Tingshuai LI*, Martin ANDERSSON

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

27 Citations (Scopus)

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 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.

Original languageEnglish
Pages (from-to)6949-6957
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume45
Issue number11
Early online date17 Jan 2020
DOIs
Publication statusPublished - 28 Feb 2020
Externally publishedYes

Bibliographical note

This work is supported by National Natural Science Foundation of China (No. 51702039).

Keywords

  • Area specific resistance
  • Electrochemical performance
  • Nanofiber
  • Oxygen reduction reaction
  • Solid oxide fuel cell

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