Zirconia – Based Electrolyte Materials for Fuel Cell Applications – Supplier Data by Fuel Cell Materials

Anode Materials For Use In Solid Oxide Fuel Cells (SOFC) and Fuel Processing - Supplier Data by NexTech Materials

Topics Covered

Background

Applications

Benefits

Product Specifications

Background

Fuel Cell Materials offers nanoscale zirconia-based electrolytes which have advantages over traditional yttrium stabilized zirconia (YSZ).  YSZ is the most popular electrolyte material for solid oxide fuel cells (SOFCs) because it conducts only oxygen ions over a wide range of oxygen partial pressures. YSZ membrane supported SOFCs are normally operated at temperatures above 800°C to achieve sufficiently high oxygen ion conductivity. Thin-film (10-20 μm) YSZ membranes and scandium-doped zirconia (SCZ) both provide high oxygen conductivity at much lower operating temperatures.  Nanoscale zirconia electrolyte materials are ideal for fabricating thin film electrolytes in electrode supported solid oxide fuel cells via colloidal deposition processes.  YSZ and SCZ are offered in the form of 100 mesh, high surface area powders.  YSZ and partially stabilized zirconia (PSZ) are available as tape casting powders.  YSZ also is offered as aqueous engineered spray coating formulation or aqueous suspension. Custom doped zirconia compositions can be produced to your specifications.

Applications

•        Electrolyte material for solid oxide fuel cells, oxygen generation systems and sensors

         Nanoscale is an additive to reduce sintering temperature of tape cast grade YSZ powder

         Colloidal deposition processes for thin-film YSZ membranes

•        Component in composite electrodes (anodes and cathodes)

 

 

Benefits

•        High crystalline-phase and chemical purity

         Surface area can be tailored to specific processing requirements

         Enhanced densification at lower sintering temperatures

Product Specifications

Product Specifications

Compositions (*)

YSZ: (ZrO2)0.92(Y2O3)0.08

PSZ: (ZrO2)0.97(Y2O3)0.03

SCZ: (ZrO2)0.90(Sc2O3)0.10

Crystal Structure

Single Phase Fluorite

Surface Area

Nano-powders 120-200 m2/g

YSZ: 4-8 m2/g; PSZ: 13-19m2/g

Crystallite Size (nano-YSZ)

5-10 nm

Ionic Conductivity (YSZ)

σ > 0.02 S/cm @ 800°C

Thermal Expansion (YSZ)

α = 10.5 ppm/°C

(*) Custom formulations available

AZoM - Metals, Ceramics, Polymer and Composites : XRD patterns of single-phase YSZ and SCZ Zirconia – Based Electrolyte nanopowders  for Fuel Cell Applications – Supplier Data by Fuel Cell Materials

Figure 1. XRD patterns of single-phase YSZ and SCZ nanopowders.

AZoM - Metals, Ceramics, Polymer and Composites : TEM micrograph of Zirconia – Based Electrolyte nano-crystalline YSZ Materials for Fuel Cell Applications – Supplier Data by Fuel Cell Materials

Figure 2. TEM micrograph of nano-crystalline YSZ.

AZoM - Metals, Ceramics, Polymer and Composites : Ionic conductivity of YSZ Zirconia – Based Electrolyte ceramic for Fuel Cell Applications – Supplier Data by Fuel Cell Materials

Figure 3. Ionic conductivity of YSZ ceramic.

AZoM - Metals, Ceramics, Polymer and Composites : Particle size distribution of nanoscale YSZ Zirconia – Based Electrolyte suspension for Fuel Cell Applications – Supplier Data by Fuel Cell Materials

Figure 4. Particle size distribution of nanoscale YSZ suspension.

 

Source: NexTech Materials

 

For more information on this source please visit NexTech Materials

 

Date Added: Jun 21, 2005 | Updated: Jul 12, 2013
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