Ceramic modules for micro solid-oxide fuel cells

Micro solid-oxide fuel cells (μ-SOFCs) based on microfabrication processes are a promising alternative to batteries for supplying portable electronics, as very high energy densities may be achieved. However, a complete μ-SOFC module is a quite intricate structure, comprising 1) a gas-processing unit (GPU) to process a convenient energy source such as lighter gas into a more usable form, 2) the energy-generating cells proper, and 3) a post-combustor. The mechanical integration of these elements and their fluidic and electrical interconnection into a single module is a very challenging task for micro-scale integration. Therefore, a modular low-temperature co-fired ceramic (LTCC) package is proposed, allowing individual testing and subsequent full integration of the different cell elements. The package functions as a hotplate, a mechanical support for the hot zone and as an electrical / fluidic interconnect, applying a slender-bridge design to minimise thermal conduction losses and stresses, thus allowing convenient low-temperature electrical connections and fluidic ports. For applications requiring a better thermal expansion match to silicon and borosilicate glass, a silicon / borosilicate glass-sealed variant was also developed. Preliminary thermal characterisation of these packages is shown, and concepts for integrating the GPU and post-combustor into the LTCC structure are presented.


Published in:
Proceedings, 7th International Conference on Ceramic Interconnect and Ceramic Microsystems Technologies (CICMT), San Diego (USA), 9-16
Presented at:
7th International Conference on Ceramic Interconnect and Ceramic Microsystems Technologies (CICMT), San Diego (USA), 4-7.4.2011
Year:
2011
Publisher:
IMAPS
Keywords:
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2011-05-27, last modified 2018-03-17

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2011 Maeder IMAPS-CICMT San Diego - ceramic modules for µ-SOFC - presentation - Download fulltextPDF
2011 Maeder IMAPS-CICMT San Diego - ceramic modules for µ-SOFC - paper - Download fulltextPDF
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