Preparation of silica-based proton conductors for intermediate temperature fuel cells

Dongho Seo, Sangsun Park, Yong Gun Shul

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The ternary system SiO2-P2O5-ZrO2 electrolyte and phosphotungstic acid (PWA) doped SiO2-P2O5-ZrO2 electrolyte were prepared for intermediate temperature fuel cell by using sol-gel technique. These silica-based proton conductors were confirmed to be non-crystalline structure without phase separation and good thermal stability by XRD and TG/DTA analysis. The doped PWA was found to be stabilized within the silica matrix and to enhance the proton conductivity. The proton conductivities of SiO2-P2O5-ZrO2 and SiO2-P2O5-ZrO2-PWA electrolytes showed 3.3×-5 and 1.8×10-3 S/cm at 90 °C, respectively, and the cell performance of SiO2-P2O5-ZrO2-PWA electrolyte was obtained as 0.02-0.25 mA/cm2 at 300 °C under humid condition.

Original languageEnglish
Pages (from-to)1016-1021
Number of pages6
JournalKorean Journal of Chemical Engineering
Volume26
Issue number4
DOIs
Publication statusPublished - 2009 Dec 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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