Z. STOYNOV

This paper addresses one of the key issues in the study of the innovative high temperature fuel cell concept, known as "IDEAL-Cell", which is in development for operation in the range of 600- 700°C. The successful operation of IDEAL-Cell requires that H+ ions produced at the PCFC anode/electrolyte section and O2- ions produced at the SOFC...

A comparative impedance study of pure ff{ G,a-r=,Sr".)rMnO3_5 rvith x : 0.25 and y :0.95) and composite LSM/YSZ {Zroz-8 mol.Yo YzO:) cathode materials for SOFC is performed. The technique of ihe Differential Impeiance Analysis (DIA), which ensures structural identihcation without any preliminary hypothesis, is applied to the data analysis. It...

The paper presents the technique of Differential Impedance Analysis (DIA), which ensures structural and parametric identification of the impedance model without a preliminary working hypothesis. Its advantages are demonstrated through results obtained from a comparative impedance study of strontium doped lanthanum manganite (LSM) and composite...

The present paper offers a discussion about an innovative dual membrane fuel cell concept IDEAL-Cell operating between 600°C-700°C. It is based on the junction of SOFCs anodic part with PCFCs cathodic part through a mixed H+ and O2- conducting porous membrane. This concept was successfully proved and developed during the 4 years of a...

Solid Oxide Fuel Cells (SOFCs) are a promising technology that can provide efficient and clean energy production. The general barriers hindering their market entry are durability, i.e. resistance to aging, and costs. In parallel to the deeper insight into the different degradation sources and improved understanding of ageing factors and their...

Steam electrolysis by means of reversible Fuel Cells is a promising concept for compensating the intermittency of renewable energy sources. Several tests on SOFC stacks operated in reverse mode (SOEC) reported faster degradation than in power production mode. Although not completely clarified, the degradation mechanisms appear partly related to...