R & D for intermediate temperature solid state fuel cells

Abstract

Abstract. Although some solid oxide fuel cells (SOFCs) are in the process of ommercialization, this technology still faces serious technical challenge due to the special high temperature (1000 ~ requirement resulting in high costs as well. It has thus been a strong tendency to develop intermediate temperature (400 to 800 ~ solid state fuel cells (ITSSFCs).ITSSFCs use either oxide ionic conductors, e.g. fluorite or perovskite oxides or proton conducting oxyacid salts and salt-oxide composites as electrolytes that have a high protonic or oxide ionic conductivity of 10 -2 to 10 -l S/cm in the IT region. The ITSSFCs may provide new opportunities for SSFC (including SOFC) commercialization. This paper gives a brief overview of the current ITSSFC status and activities of research and development mainly based on our work.

Electrical Conductivity of NiO-Gadolinia Doped Ceria Anode Material for Intermediate Temperature Solid Oxide Fuel Cells

“…The conventional SOFC operates in the temperature range 1073 -1273 K which results in longer start up time, less durability of cell components and demands on expensive sealant and interconnects. So numerous efforts have being attempted to lower the operating temperature such as development of nanostructured thin film electrolytes, bi phase nanocomposites, utilization of mixed oxide (ionic and electronic) conducting (MIEC) materials as alternative anodes etc., These approaches can be effectively lower the operating temperature and make the device favorable for various applications such as stationary power generation and portable charges [14][15][16][17][18][19][20][21][22].…”