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Combustion Characterization and Model Fuel Development for Micro-tubular Flame-assisted Fuel Cells

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A low-operating-temperature solid oxide fuel cell in hydrocarbon-Air mixtures

Hibino¹, Hashimoto, Inoue

¹Department of Structure Formation Process, National Industrial Research Institute of Nagoya, Nagoya 462-8510, Japan. Graduate School of Human Information, Nagoya University, Nagoya 466-0804, Japan.

Science (New York, N.Y.)

|June 17, 2000

Summary

This study demonstrates a single-chamber solid oxide fuel cell using a ceria-based electrolyte, achieving high electromotive force and power density below 773 K.

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Area of Science:

Electrochemistry
Materials Science
Energy Conversion

Background:

Solid oxide fuel cells (SOFCs) offer efficient energy conversion.
Lower operating temperatures for SOFCs are desirable for broader applications.
Ceria-based electrolytes show promise for intermediate-temperature SOFCs.

Purpose of the Study:

To evaluate the performance of a single-chamber SOFC with a ceria-based solid electrolyte.
To investigate the cell's behavior at temperatures below 773 kelvin.
To determine the power generation capabilities and internal resistances.

Main Methods:

Fabrication and testing of a single-chamber solid oxide fuel cell.
Utilizing a ceria-based solid electrolyte.
Operating the cell with ethane or propane and air mixtures below 773 K.

Main Results:

The cell generated electromotive forces of approximately 900 millivolts.
The ceria-based electrolyte exhibited purely ionic conductivity.
Electrode-reaction resistance was found to be negligible.
Peak power densities of 403 mW/cm² at 773 K and 101 mW/cm² at 623 K were achieved.

Conclusions:

Ceria-based solid electrolytes are effective for single-chamber SOFCs at intermediate temperatures.
The cell design minimizes internal resistances, leading to high power output.
This technology holds potential for efficient, lower-temperature fuel cell applications.