WEB Multilayer technology for manufacturing of metal supported cellsWednesday (01.01.2020) 00:30 - 00:45 Part of:
High temperature fuel cells offer highest system efficiencies of energy conversion of hydrocarbon fuels. The main drawback of this technology is the heat-up time up to operating temperature. This disadvantage can be effectively addressed by metal supported cell (MSC) concept allowing operation at decreased temperatures and extremely high heating rates. To achieve low cost advantages for MSC in terms of manufacturing costs the co-firing technology of metal support and electrolyte should be applied. For this purpose the shrinkage of metal support and electrolyte substrate has been matched using sintering additives (for 8YSZ) and special milling techniques for metallic powders (Crofer 22 APU and MoTiLa) as well as pore formers addition to metal particles in the tape. Using the porous anode interlayer co-firing of tri-layer structures has been successfully realized resulting in 0,2 mm thickness of metallic support with porosity of >35% and gas tight 8YSZ layer with thickness of 15 µm. The aspects of adjustment of shrinkage and interactions of singular layers will be discussed in detail.