Fuel Cell Cathode Materials and Formulations - 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

Composite Cathodes

Screen Printing Inks

Selecting Cathode Formulations

Background

Fuel Cell Materials offers a full line of perovskite electrode materials for use as cathodes in solid oxide fuel cells or as electrodes for other ceramic electrochemical devices.  Standard formulations include lanthanum strontium manganite (LSM), lanthanum strontium ferrite (LSF), and lanthanum strontium cobalt ferrite (LSCF). Perovskite electrode powders are provided with surface area of 4 to 8 m2/gram and particle size of 0.5-0.7 microns (d50). Additional formulations can be produced to your specifications.

Composite Cathodes

Composite cathodes based on mixtures of electrolyte and electrode materials have been shown to improve electrode performance at lower temperatures by increasing the volume of active sites available for electrochemical reactions.  The key to achieving high performance in composite electrodes is optimizing the dispersion of the electrolyte and electrode phases, which is accomplished through FCM’s patent-pending processes.  We offer yttrium-stabilized zirconia (YSZ) or gadolinium doped ceria (GDC) electrolytes admixed with either LSM, LSF, or LSCF electrode materials. These composite electrode materials are produced with surface areas of 4 to 8 m2/gram, and the electrolyte content is 30-40 volume percent.  We can provide alternative composite electrode formulations, with different electrode or electrolyte compositions, and/or different electrolyte contents.

Screen Printing Inks

All of Fuel Cell Material’s electrode materials are available as screen printing inks, which can be diluted for other methods of electrode deposition (e.g., spraying or dip coating). 

Selecting Cathode Formulations

The optimum electrode material for a given application depends on thermal expansion of the electrode material, chemical compatibility of the electrode with the electrolyte material being used, and the target operating temperature range.  Selection criteria for cathode formulations are provided in Table 1.

Table 1. Fuel cell cathode formulations.

Formulation

Composition

CTE (ppm/°C)

Electrolyte Materials

Temperature Range (°C)

LSM15

(La0.85Sr0.15)MnO3

10

YSZ

800 to 1000

LSM20

(La0.80Sr0.20)MnO3

11

YSZ

800 to 1000

LSF20

(La0.80Sr0.20)FeO3

13

YSZ, GDC, LSGM

750 to 900

LSF40

(La0.60Sr0.40)FeO3

15

GDC

750 to 900

LSCF6428

(La0.60Sr0.40)(Fe0.80Co0.20)O3

15

GDC

700 to 750

LSM/YSZ

30 vol% YSZ

10

YSZ

800 to 900

LSM/GDC

40 vol% GDC

12

YSZ, GDC, LSGM

750 to 900

LSF20/GDC

40 vol% GDC

13

YSZ, GDC, LSGM

700 to 900

LSF40/GDC

40 vol% GDC

14

GDC, LSGM

700 to 900

LSCF6428/GDC

30 vol% GDC

14

GDC, LSGM

650 to 750

AZoM - Metals, Ceramics, Polymer and Composites : SEM micrographs of screen printed composite (LSF40/GDC) electrode coating for use in Fuel Cell Cathodes – Supplier Data by Fuel Cell Materials

AZoM - Metals, Ceramics, Polymer and Composites : SEM micrographs of screen printed composite (LSF40/GDC) electrode coating for use in Fuel Cell Cathodes – Supplier Data by Fuel Cell Materials

Figure 1. SEM micrographs of screen printed composite (LSF40/GDC) electrode coating.

AZoM - Metals, Ceramics, Polymer and Composites : Electrical conductivity of perovskite electrode materials for use in Fuel Cell Cathodes – Supplier Data by Fuel Cell Materials

Figure 2. Electrical conductivity of perovskite electrode materials.

 

Source: NexTech Materials

 

For more information on this source please visit NexTech Materials

 

Date Added: Jun 21, 2005 | Updated: Jun 11, 2013
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