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Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells

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Published on: September 20, 2012

Solid oxide fuel cell with corrugated thin film electrolyte.

Pei-Chen Su¹, Cheng-Chieh Chao, Joon Hyung Shim

¹Department of Mechanical Engineering, Stanford University, Stanford, California 94305, USA. peichen@stanford.edu

|July 9, 2008

Summary

Researchers developed a novel low-temperature micro solid oxide fuel cell using corrugated electrolyte membranes. This design significantly boosts power density compared to planar electrolytes, achieving 861 mW/cm2 at 450°C.

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Published on: April 16, 2017

Area of Science:

Materials Science
Electrochemistry
Energy Conversion

Background:

Solid oxide fuel cells (SOFCs) are promising energy conversion devices.
Low-temperature SOFCs require enhanced performance through innovative designs.
Increasing the electrochemically active surface area is crucial for improved power density.

Purpose of the Study:

To develop and test a low-temperature micro solid oxide fuel cell with a corrugated electrolyte membrane.
To enhance the electrochemically active surface area using nanostructured yttria-stabilized zirconia.
To evaluate the performance improvement offered by corrugated versus planar electrolyte membranes.

Main Methods:

Fabrication of 70 nm yttria-stabilized zirconia membranes on prepatterned silicon substrates.
Development of corrugated electrolyte membranes by releasing them from the silicon substrate.
Testing of fuel cell performance at various temperatures (400°C and 450°C).

Main Results:

Corrugated electrolyte membranes demonstrated increased power density compared to planar designs.
Maximum power densities of 677 mW/cm2 at 400°C and 861 mW/cm2 at 450°C were achieved.
The corrugated structure effectively increased the electrochemically active surface area.

Conclusions:

A corrugated electrolyte membrane design is effective for enhancing low-temperature micro SOFC performance.
The developed micro SOFCs show significant potential for efficient energy conversion.
Nanostructuring and corrugation are key strategies for advancing SOFC technology.