Publications de Jan Van Herle | EPFL Graph Search

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Sulfur poisoning in a strontium doped lanthanum cobaltite (LSC) cathode current collection layer was revealed in a solid oxide fuel cell (SOFC) tested in repeat-element and stack configuration. Sources of sulfur contamination, other than trace SOx in air, ...

The traditional pathway of electrolysis based power-to-methane systems consists of water (liquid or vapor) electrolysis followed by CO2 methanation. The use of solid-oxide electrolysers allows an alternative pathway, i.e., steam and CO2 electrolysis follow ...

Electrochemical Impedance Spectroscopy (EIS) is extensively used to characterize Solid Oxide Cells (SOCs) to extract information on the elementary loss mechanisms. However, these individual mechanisms usually overlap in the frequency domain, requiring dedi ...

The membrane electrode assembly is the powerhouse of the anion exchange membrane water electrolyser (AEMWE), thereby placing a great importance on the associated preparation conditions. This paper investigated how annealing temperature and time impacted ac ...

The current study performs the thermodynamic and life-cycle assessments (LCA) of a novel charging station in two system designs. The goal is to design an efficient charging station for electric vehicles with high efficiencies and low environmental impacts ...

This paper suggests two novel designs for the electric vehicle charging stations using LiMn2O4 Lithium-ion battery and based on a Solid Oxide Fuel Cell (SOFC) and absorption refrigeration cycle (ARC) technologies to provide electricity and cooling, respect ...

Operating under high temperature (> 700 o C), solid oxide fuel cell (SOFC) devices can transform chemical energy from H 2 , ammonia, natural gas and other fuels into electricity and heat with high efficiency. Despite these advantages, the commercial deployment of SOFC systems faces significant challenges in maintaining safe, stable and optimal operation under dynamic power demands. These operational challenges stem from two primary factors: (1) external fuel composition variations, particularly in natural g

The growing demand for renewable-powered hydrogen drives interest in water electrolysis, making anion exchange membrane water electrolysis (AEMWE) an emerging technology. The anion exchange membrane (AEM) integrates the benefits of both the proton exchange membrane (PEMs) and alkaline water electrolysis (AWEs), enabling the use of cost-efficient transition metal catalysts instead of precious metals and operating in distilled water or low-concentration KOH electrolytes, thereby reducing corrosion issues. Lik

The biogas needs to be reformed before electro-chemical conversion in the solid-oxide fuel cell, which can be promoted efficiently with wise thermal management and reforming conditions. To ensure the system safety and catalysts durability, additional miner ...

The increasing penetration of variable renewable energies poses new challenges for grid management. The economic feasibility of grid-balancing plants may be limited by low annual operating hours if they work either only for power generation or only for pow ...

Solid-oxide electrolyzer (SOE) based power-to-methane (PtM) system can efficiently store surplus renewable power into synthesis natural gas by electrolysis and methanation. The system performance depends on the operating point of the electrolyzer and syste ...

The operation of methanation units, whether standalone or integrated with low or high temperature electrolysis, relies on the objective function to be maximized. In the cases of standalone operation or low temperature water electrolysis integration, the objective function is typically the higher heating value (HHV) based efficiency. The co-generation efficiency which includes the steam produced from the reaction's heat should be optimized for applications such as the coupling with steam electrolysis: solid-

A decision-support tool (ORES) in the form of a linear program is developed to determine the optimal investment and operating decisions for residential energy systems. It shows how energy conversion units such as a cogeneration fuel cell, a heat pump, a bo ...

Structural reliability is a hurdle for the large-scale commercialisation of solid oxide fuel cell (SOFC). The cells are prone to cracking, due to the brittleness of their constitutive materials. In operation, the failure of one of them can arise from the non-uniform temperature distribution, coupled to detrimental interaction with the other stack components. In the long-term, the uneven distribution of temperature, gas composition, current density or overpotential induces non-uniform creep deformation and m

Coupling a biomass gasifier with a solid oxide fuel cell system through a high-temperature syngas compressor holds great promise to achieve low-emission, small-scale combined heat and power, since it reduces the number of heat exchangers and increases the ...

Power-to-fuel systems via solid-oxide electrolysis are promising for storing excess renewable electricity by efficient electrolysis of steam (or co-electrolysis of steam and CO2) into hydrogen (or syngas), which can be further converted into synthetic fuel ...

Structural stability issues in planar solid oxide fuel cells arise from the mismatch between the coefficients of thermal expansion of the components. The stress state at operating temperature is the superposition of several contributions, which differ depe ...

A consortium was created to investigate electroceramic materials that show ionic or mixed ionic-electronic conduction (MIEC), for application as oxygen separation membranes and in solid oxide fuel cells (SOFC, electrolytes and cathodes). The focus is on dense structures as supported thin layers (5-20 µm) for reduced temperature operation (600-750°C). Under these conditions grain boundary effects are important. Zirconia, ceria and gallate are considered for SOFC electrolytes. The nature and the amount of the

Electricity production and consumption must be balanced for the electrical grid. However, the rapidly growing intermittent power sources are now challenging the supply-demand balance, leading to large flexibility needs for grid management. The plant integr ...

Ammonia serves as a promising hydrogen carrier and energy storage medium due to its high hydrogen content, ease of transport, and well-established production infrastructure. This study presents a comprehensive techno-economic analysis of ammonia-to‑hydroge ...

Jan Van Herle

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Sulfur as pollutant species on the cathode side of a SOFC system

Power-to-methane via co-electrolysis of H2O and CO2: Reactor operation and system simulation

Model-assisted identification of solid oxide cell elementary processes by electrochemical impedance spectroscopy measurements

Raising the temperature on electrodes for anion exchange membrane electrolysis-activity and stability aspects

The thermodynamic and life-cycle assessments of a novel charging station for electric vehicles in dynamic and steady-state conditions

Two novel cogeneration charging stations for electric vehicles: Energy, exergy, economic, environment, and dynamic characterizations

Safe and Optimal Operation of Commercial μ-CHP SOFC System Under Real-World Condition

A review on transport properties and performance of commercial and novel membranes for anion exchange membrane water electrolyser

Comparison and optimization of different fuel processing options for biogas-fed solid-oxide fuel cell plants

Reversible solid-oxide cell stack based power-to-x-to-power systems: Comparison of thermodynamic performance

Trade-off designs and comparative exergy evaluation of solid-oxide electrolyzer based power-to-methane plants

Identification of key control variables for a methanation unit through system analysis using experimental results

A linear programming approach to the optimization of residential energy systems

Current state of models for the prediction of mechanical failures in solid oxide fuel cells

A High-Speed, High-Temperature, Micro-Cantilever Steam Turbine for Hot Syngas Compression in Small-Scale Combined Heat and Power

Power-to-fuels via solid-oxide electrolyzer: Operating window and techno-economics

Simulation of thermal stresses in anode-supported solid oxide fuel cell stacks. Part I: Probability of failure of the cells

Ceramic Oxygen Separation Membranes and Mixed Conductors

Triple-Mode Grid-Balancing Plants via Biomass Gasification and Reversible Solid-Oxide Cell Stack: Economic Feasibility Evaluation via Plant Capital-Cost Target

Techno-economic analysis of ammonia to hydrogen and power pathways considering the emerging hydrogen purification and fuel cell technologies