Fabrication of anode-supported thin BCZY electrolyte protonic fuel cells using NiO sintering aid

Kan Rong Lee, Chung Jen Tseng, Shian Ching Jang, Jing Chie Lin, Kuan Wen Wang, Jeng-Kuei Chang, Ting Chia Chen, Sheng Wei Lee*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

A thin and fully dense BaCe0.6Zr0.2Y0.2O3-δ (BCZY) electrolyte for the use of anode-supported protonic fuel cells has been successfully prepared by spin coating using NiO sintering aid. The effects of NiO addition on the electrolyte microstructures and fuel cell performances are also investigated. An appropriate NiO addition has a significant positive contribution to the densification and grain growth of thin BCZY electrolytes. However, too much NiO addition gives rise to NiO aggregation in BCZY electrolyte and deteriorates the cell performance. The enhanced sintering mechanism can be mainly attributed to the oxygen vacancies generated from the NiO decomposition and bulk diffusion of Ni into BCZY perovskites. The fuel cell with a BCZY-3%NiO electrolyte exhibits the highest maximum power density of ~106.6 mW/cm2 at 800 °C among all fuel cells in this study. The electrochemical impedance characteristics of thin BCZY electrolyte fuel cells are further discussed under open circuit conditions.

Original languageEnglish
Pages (from-to)23784-23792
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number42
DOIs
StatePublished - 3 Sep 2019

Keywords

  • Electrochemical impedance spectroscopy
  • Proton-conducting electrolyte
  • Sintering aid
  • Solid oxide fuel cells
  • Spin coating

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