Metal-Supported Solid Oxide Fuel Cells

Abstract

Low cost, colloidal deposition methods have been utilized to produce novel solid oxide fuel cell structures on metal alloy support electrodes. YSZ films were deposited on iron-chrome supports on top of a thin Ni/YSZ catalytic layer, and sintered at 1350°C, in a reducing atmosphere. Dense, 20 m YSZ electrolyte films were obtained on highly porous stainless steel substrates.These metal-supported fuel cells were tested at 800 and 900°C, achieving power densities of over 200 mW/cm 2 at 900°C, using platinum paste cathodes. The cells have shown excellent resistance to thermal cycling, and open up a new low cost path to SOFC commercialization.

Synthesis of Dispersed and Contiguous Nanoparticles in Solid Oxide Fuel Cell Electrodes

“…There are several benefits to the mSOFC design: significant decrease in cost by substituting expensive ceramics with cheap metal components such as FeCr steels, vastly increased robustness provided by the metal support, reduction-oxidation tolerance, the ability to sustain rapid thermal cycling, the ability to braze seals, etc [28,[30][31][32][33][34]. Infiltrating the catalysts after the high temperature sintering and brazing steps avoids undesirable decomposition of LSM, Ni coarsening and interdiffusion between Ni catalyst and FeCr in the support.…”

High performance Ni–Fe alloy supported SOFCs fabricated by low cost tape casting-screen printing-cofiring process

“…Different from conventional electrolyte-and electrodesupported solid oxide fuel cells (SOFCs), metal-supported SOFCs proposed firstly by Villarreal et al [1] are built on a porous metal substrate, which possesses high thermal conductivity and ductility that improve cell temperature gradient and thermal shock resistance [2] as well as capability withstanding vibration and mechanical loading [3,4].…”

Effect of Oxidation on Creep Strength and Resistivity of Porous Fe-26Cr-1Mo

“…However, the need for lightweighting and ruggedness can be addressed by implementing alternative stack designs such as metal-supported cells, where robust mechanical support is provided by a lightweight, ductile, porous metal. [4,7] The anode, electrolyte, and cathode can be deposited directly on top of metal-supported cells. This has led to replacement of expensive La-based ceramics with ferritic steels [6,8] and can reduce the thickness of yttriastabilized zirconia used in the electrolyte.…”

“…[10][11][12] Porous ferritic stainless steels suitable for metal-supported cells have been successfully prepared by a variety of methods including: laser drilling, [13][14][15] tape-casting, [16] and prealloyed powder isostatic pressing. [7,17,18] Porosities are typically in the range of 30 to 50 pct so as to allow sufficient gas flow across the electrodes. However, the high surface area of these porous structures can lead to rapid oxidation.…”