Novel composite electrolytes for solid oxide fuel cell applications

Richard J Ball, R Stevens

Research output: Contribution to conferencePaper

Abstract

Gadolinia doped ceria is a good candidate for use as an alternative to zirconia for solid oxide fuel cell electrolytes. This is due to its higher ionic conductivity at reduced temperatures. However, doped ceria has a number of disadvantages such as reduced strength and electronic conductivity. An investigation has been carried out to characterise novel composite structures consisting of tetragonal zirconia particles in a doped ceria matrix. Results indicate that an increase in strength can be produced in the ceria by addition of zirconia particles, however, this is dependent on particle size and heat treatment. A structural analysis of the composite structures was carried out using scanning electron microscopy. Electrical properties were determined using a Solartron dielectric test system.
Original languageEnglish
Pages751-758
Number of pages8
Publication statusPublished - 2002
Event26th Annual Conference on Composites, Advanced Ceramics Materials ans Structures - Cocoa Beach, FL, USA United States
Duration: 1 Jan 2002 → …

Conference

Conference26th Annual Conference on Composites, Advanced Ceramics Materials ans Structures
CountryUSA United States
CityCocoa Beach, FL
Period1/01/02 → …

Keywords

  • Scanning electron microscopy
  • Heat treatment
  • Zirconia
  • Solid electrolytes
  • Solid oxide fuel cells
  • Electric properties
  • Cerium compounds
  • Ionic conduction in solids
  • Particle size analysis
  • Fracture toughness

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