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

Fingerprint

phosphorus pentoxide
Silicon Dioxide
Protons
Fuel cells
Electrolytes
Silica
Proton conductivity
Temperature
Phosphotungstic Acid
Ternary systems
Phase separation
Differential thermal analysis
Sol-gels
Thermodynamic stability
Acids

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

@article{076347575811408895acfea2fec32e53,
title = "Preparation of silica-based proton conductors for intermediate temperature fuel cells",
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.",
author = "Dongho Seo and Sangsun Park and Shul, {Yong Gun}",
year = "2009",
month = "12",
day = "1",
doi = "10.1007/s11814-009-0169-8",
language = "English",
volume = "26",
pages = "1016--1021",
journal = "Korean Journal of Chemical Engineering",
issn = "0256-1115",
publisher = "Springer New York",
number = "4",

}

Preparation of silica-based proton conductors for intermediate temperature fuel cells. / Seo, Dongho; Park, Sangsun; Shul, Yong Gun.

In: Korean Journal of Chemical Engineering, Vol. 26, No. 4, 01.12.2009, p. 1016-1021.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Preparation of silica-based proton conductors for intermediate temperature fuel cells

AU - Seo, Dongho

AU - Park, Sangsun

AU - Shul, Yong Gun

PY - 2009/12/1

Y1 - 2009/12/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=80655139623&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80655139623&partnerID=8YFLogxK

U2 - 10.1007/s11814-009-0169-8

DO - 10.1007/s11814-009-0169-8

M3 - Article

AN - SCOPUS:80655139623

VL - 26

SP - 1016

EP - 1021

JO - Korean Journal of Chemical Engineering

JF - Korean Journal of Chemical Engineering

SN - 0256-1115

IS - 4

ER -