Isostatic pressing of screen printed nickel-gadolinium doped ceria anodes on electrolyte-supported solid oxide fuel cells

Yosuke Komatsu, Anna Sciazko, Naoki Shikazono

Research output: Contribution to journalArticlepeer-review

Abstract

Microstructures of porous electrodes have great importance for promoting electrochemical reactions in solid oxide fuel cells (SOFCs). The present paper describes the application of isostatic pressing of screen printed nickel (Ni) gadolinium doped ceria (GDC) composite anode slurry on an electrolyte supported cell (ESC) and quantitatively discusses its influence on the cell electrochemical performance and microstructure. The current-voltage characteristics and electrochemical impedance spectra of the fabricated anodes of the ESC are measured. The microstructure parameters of the anodes are obtained by focused ion beam-scanning electron microscopy (FIB-SEM). The isostatic pressing decreases the porosity of the screen printed anodes, improves the Ni connectivity and increases the active triple phase boundary (TPB) density, but it does not change significantly the total TPB and double phase boundary (DPB) densities. Additionally, pressing enhances the adhesion of the electrode to the electrolyte. These observations are consistent with the improvement of the electrochemical performance of the isostatically pressed anodes.

Original languageEnglish
Article number229317
JournalJournal of Power Sources
Volume485
DOIs
Publication statusPublished - 2021 Feb 15

Keywords

  • Isostatic pressing
  • Microstructure
  • Ni-GDC anode
  • Screen printing
  • Solid oxide fuel cell

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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