Defence of dissertation in the field of engineering physics, Sami Jouttijärvi, MSc (Tech)

Novel nanocomposite fuel cells as clean energy sources

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Title of the dissertation is "Studies on single-component and three-component nanocomposite fuel cells"

Fuel cells convert electricity from hydrogen with a high efficiency, which makes them intriguing candidates for the clean energy production in the future. The performance of the novel nanocomposite fuel cells can be improved significantly by studying systematically their working principles, nanostructures and the factors affecting to their performance.

Ceramic nanocomposite fuel cell (CNFC) consists of three layers. The ionic conductivity of the middle layer, the electrolyte, is improved by mixing a salt, typically an alkali carbonate mixture, to the solid oxide. Single-layer fuel cell (SLFC) is a fresh innovation where the traditional three-layer structure is replaced by a single functional layer, simplifying the manufacturing procedures.

In this Thesis the performance and structure of CNFC was studied by macroscopic and microscopic methods. Significant power density was achieved with two different CNFCs. The SLFC research focused on studying the working principles, such as dominating charge carriers, and performing a systematic study on the factors affecting the cell performance.

Opponent: Dr. Mikael Syväjärvi, Linköping Universitet, Sweden.

Custos: Professor Peter D. Lund, Aalto University School of Science, Department of Applied Physics.

Contact information: Sami Jouttijärvi, Teknillisen fysiikan laitos, +358504691203, [email protected]

Electronic dissertation

The dissertation is publicly displayed 10 days before the defence:

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