Progress in material selection for solid oxide fuel cell technology: A review

Mixed ionic-electronic conducting (MIEC) ceramic-based membranes for oxygen separation

Sealants for solid oxide fuel cells

Es wird ein Brennstoffzellenstapel mit Zelleneinheiten bereitgestellt, die eine Sammelleitung, eine offene Endplatte, die an einer Seite der Zelleneinheiten angeordnet ist und einen Reaktionsgaseinlass und -auslass hat, die mit der Sammelleitung verbunden sind, und eine geschlossene Endplatte enthalten, die an der an der anderen Seite der Zelleneinheiten angeordnet ist und die Sammelleitung abschliest. Insbesondere enthalt die Endplatte eine erste schrage Oberflache, die die Stromung eines Reaktionsgases am Reaktionsgaseinlass und an der Sammelleitungs-Schnittstelle regelt. Ein erster Ausrichtungsvorsprung bildet die erste schrage Oberflache und richtet die Zelleneinheiten aus, und die geschlossene Endplatte enthalt eine zweite schrage Oberflache, die die Stromung des Reaktionsgases an der Sammelleitungs-Schnittstelle regelt. Auserdem bildet ein zweiter Ausrichtungsvorsprung die zweite schrage Oberflache und richtet die Zelleneinheiten entsprechend aus.

Fuel cell stack

This paper reports experimental and modeling investigations of thermal methane reforming chemistry within porous Ni–YSZ anode materials. Because the reforming chemistry is difficult to observe directly in an operating fuel cell, a specially designed experiment is developed. In the experiment a 0.75 mm-thick anode is sandwiched between two small co-flowing gas channels. One channel represents the fuel channel of a solid-oxide fuel cell (SOFC). The composition in the other channel carries the species that would be produced in an operating fuel cell by the electrochemical charge-transfer reactions in the thin three-phase regions near the interface between the anode and the dense electrolyte membrane (i.e., H2O and CO2). Because the anode structure is porous (and there is no dense electrolyte or cathode applied), there is convective and diffusive species flux between the two flow channels. The entire assembly is maintained at approximately 800  ° C in a furnace. The results of heterogeneous reforming kinetics are determined by using mass spectrometry to measure the species composition at the outlet of both channels. Experimental results are interpreted using a computational model that incorporates channel gas flow, porous-media transport, and elementary heterogeneous chemical kinetics. The overall objective is to develop quantitative models of non-electrochemical heterogeneous reforming chemistry within a Ni–YSZ anode.

Methane reforming kinetics within a Ni–YSZ SOFC anode support

Synthesis and Properties of a Barium Aluminosilicate Solid Oxide Fuel Cell Glass-Ceramic Sealant

Ultra-low leak rate of hybrid compressive mica seals for solid oxide fuel cells

This paper examined the room-temperature mechanical properties of a mixed-conducting perovskite La 1-x Sr x Co 0.2 Fe 0.8 O 3 (x = 0.2-0.8). Powders were made by the combustion synthesis technique and sintered at 1250°C in air. Sintered density, crystal phase, and grain size were characterized. Young's and shear moduli, microhardness, indentation fracture toughness, and biaxial flexure strength were determined. The Young's and shear moduli slightly increased with increasing strontium content. Young's modulus of 151-188 GPa and shear modulus of 57-75 GPa were measured. Biaxial flexure strength of ∼160 MPa was measured for lower strontium content batches. Strength greatly decreased to ∼40 MPa at higher strontium concentrations (x = 0.6-0.8) because of the formation of extensive cracking. Indentation toughness showed a higher value (∼1.5 MPa.m 1/2 ) for low strontium (x = 0.2) content and a lower value (∼1.1 MPa.m 1/2 ) for the other batches (x = 0.4-0.8). Materials with fine and coarse grain size were also tested at various indent loads and showed no dependence of toughness on crack size. In addition, fractography was used to characterize the critical flaw and fracture mode.

Mechanical Properties of La1‐xSrxCo0.2Fe0.8O3 Mixed‐Conducting Perovskites Made by the Combustion Synthesis Technique

Effect of pre-oxidation and environmental aging on the seal strength of a novel high-temperature solid oxide fuel cell (SOFC) sealing glass with metallic interconnect

Yeong-Shyung Chou

Papers

Synthesis and Properties of a Barium Aluminosilicate Solid Oxide Fuel Cell Glass-Ceramic Sealant

Ultra-low leak rate of hybrid compressive mica seals for solid oxide fuel cells

Mechanical Properties of La1‐xSrxCo0.2Fe0.8O3 Mixed‐Conducting Perovskites Made by the Combustion Synthesis Technique

Effect of pre-oxidation and environmental aging on the seal strength of a novel high-temperature solid oxide fuel cell (SOFC) sealing glass with metallic interconnect

Effect of aluminizing of Cr-containing ferritic alloys on the seal strength of a novel high-temperature solid oxide fuel cell sealing glass