Stefan Diethelm

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Related publications (52)

Thermodynamic analysis and heat integration of wood gasifier-SOFC systems

Stefan Diethelm, François Maréchal, Matthias Dubuis

2009

Ageing of anode-supported solid oxide fuel cell stacks including thermal cycling, and expansion behaviour of MgO-NiO anodes

Stefan Diethelm, Jan Van Herle

This paper reports on medium term tests of anode-supported five-cell short stacks, as well as on some separate anode development. Two stacks were operated under steady-state conditions: one with unprotected metal interconnects, H-2 fuel and 0.35 A cm(-2) ( ...

Elsevier2008

Ageing of anode-supported solid oxide fuel cell stacks including thermal cycling, and expansion behaviour of MgO–NiO anodes

Stefan Diethelm, Jan Van Herle

2008

Impact of Materials and Design on Solid Oxide Fuel Cell Stack Operation

Stefan Diethelm, Jan Van Herle, Zacharie Wuillemin, Arata Nakajo, Nordahl Autissier

Planar SOFC stack technology based on a unique concept (SOFConnex™) uses structured gas distribution layers between unprofiled metal sheet interconnects and thin Ni-YSZ anode supported electrolyte cells. The layers are flexible both in material and designa ...

2008

Design of 500 W Class SOFC Stack with Homogeneous Cell Performance

Stefan Diethelm, Jan Van Herle, Zacharie Wuillemin, Arata Nakajo, Emily Thorn, Nordahl Autissier

Our planar SOFC stacking technology uses unprofiled metallic interconnects (MIC) and thin cells of tape cast anode supported YSZ. The key element is the gas diffusion layer (GDL) between cell and MIC, which consists of so-called SOFConnex™. Using square ce ...

The Electrochemical Society2007

Tubular La0.7Ca0.3Fe0.85Co0.15O3-delta Perovskite Membranes, Part I: Preparation and Properties

Stefan Diethelm, Jan Van Herle

Dense tubular self-supporting La0.7Ca0.3Fe0.85 Co0.15O3-δperovskite membranes were prepared by thermoplastic extrusion. The rheological behavior of the ceramic mixture was studied. Non-deformed tubes o ...

2006

Oxygen transport in La0.5Sr0.5Fe1-yTi yO3-δ (y=0.0,0.2) membranes

Stefan Diethelm, Jan Van Herle, Defne Bayraktar

The influence of partial substitution of Fe with Ti on the oxygen transport properties of La1- xSrxFeO3 membranes was investigated in view of their application for oxygen separation. Samples of composition La0.5Sr0.5 Fe1-yTiyO3-δ (y = 0, 0.2) were prepared ...

2006

Tubular La0.7Ca0.3Fe0.85 Co0.15O3-δPerovskite Membranes, Part II: Performance and Stability

Stefan Diethelm, Jan Van Herle

Oxygen permeability through the tubular La0.7Ca0.3Fe0.85 Co0.15O3-δ perovskite membrane prepared by thermoplastic extrusion was measured in the temperature range from 800° to 1040°C in an air/argon gradient, and compared with the oxygen permeability of pla ...

2006

Correlation between oxygen transport properties and microstructure in La0.5Sr0.5FeO3-δ

Stefan Diethelm, Philippe Buffat, Jan Van Herle, Joseph Sfeir

The effect of the bulk microstructure (grain size distribution, grain boundary composition on the oxygen transport properties of La0.5Sr0.5FeO3membranes was investigated. For this purpose, samples with different microstruct ...

2005

PROGRESS IN STACK POWER DENSITY USING THE SOFCONNEX™ CONCEPT

Alexandre Closset, Stefan Diethelm, Diego Larrain, Raphaël Ihringer, Jan Van Herle, Zacharie Wuillemin, Christian Blanc, Emily Thorn, Nordahl Autissier

Our SOFC stack development technology is based on the unique SOFConnexTM concept, using flexible gas distribution layers between metal sheet interconnect and thin ASE cells. Flexibility is given both in material and design. This ensures proper electrical c ...

The Electrochemical Society2005

Innovative flexible SOFC stack concept

Stefan Diethelm, Jan Van Herle

We present a SOFC stack technology based on the unique SOFConnex™ concept. It uses flexible gas distribution layers between metal sheet interconnects and thin ASE cells (Ni-YSZ anode supported, thin electrolyte). Flexibility is given both in material and d ...

2005

Electrochemical characterisation of oxygen transport and nonstoichiometry in mixed conducting perovskite-type oxides

Stefan Diethelm

EPFL2001

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