Current Status of SOFC Development by wet Process

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Abstract
The development of a practical solid oxide fuel cell (SOFC) requires an improvement in cell performance and a manufacturing technology suitable for mass production. In particular, tubular type SOFC is thought to be superior in its reliability because the configuration avoids high temperature sealing and reduces the thermal stresses resulting from contact between cells. The authors have been developing a tubular type SOFC with an electrode support by a wet processing technique, which is suitable for mass production. A practical SOFC should have high efficiency and reliability. As for the efficiency, it is necessary to operate SOFC at a high fuel utilization and to use a natural gas, for example, methane and other hydrocarbons, as fuel. One special subject for the SOFC system is the development of the cell which is superior in internal reforming on the fuel electrode. And as for the reliability, it is necessary to demonstrate the durability for the long-term operation and for thermal cycling. This paper reviews the cell durability for the long-term operation and for thermal cycling. The cell performance with internal reforming of methane is also reviewed in this paper.

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