The regimes of catalyst layer operation in a fuel cell

Kulikovsky, Andrei

doi:10.1016/j.electacta.2010.06.053

Cited by 96 publications

(97 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to poor oxygen transport, the rest of the CCL experiences "oxygen starvation", and it does not contribute to current conversion. This regime leads to the doubling of the apparent Tafel slope, which dramatically increases the overpotential [12].…”

Section: Polarization Curvesmentioning

confidence: 99%

“…Physically, at low D, the oxygen reduction reaction runs in a small domain close to the CCL/GDL interface, where more oxygen is available [12]. Due to poor oxygen transport, the rest of the CCL experiences "oxygen starvation", and it does not contribute to current conversion.…”

Section: Polarization Curvesmentioning

confidence: 99%

“…With the function φ in hand, we calculate the local current density,j 0 (z), from Equation (12). The overpotential is then calculated by settingz = 0 in Equation (15).…”

Section: Quasi-2d Polarization Curvementioning

confidence: 99%

“…A characteristic "indicator" of this regime is the dimensionless reaction penetration depth for the oxygen transport in the CCL given by [12]:…”

Section: Polarization Curvesmentioning

confidence: 99%

See 3 more Smart Citations

Polarization Curve of a Non-Uniformly Aged PEM Fuel Cell

Kulikovsky

2014

Energies

View full text Add to dashboard Cite

Abstract:We develop a semi-analytical model for polarization curve of a polymer electrolyte membrane (PEM) fuel cell with distributed (aged) along the oxygen channel MEA transport and kinetic parameters of the membrane-electrode assembly (MEA). We show that the curve corresponding to varying along the channel parameter, in general, does not reduce to the curve for a certain constant value of this parameter. A possibility to determine the shape of the deteriorated MEA parameter along the oxygen channel by fitting the model equation to the cell polarization data is demonstrated.

show abstract

Section: Polarization Curvesmentioning

confidence: 99%

Section: Polarization Curvesmentioning

confidence: 99%

“…With the function φ in hand, we calculate the local current density,j 0 (z), from Equation (12). The overpotential is then calculated by settingz = 0 in Equation (15).…”

Section: Quasi-2d Polarization Curvementioning

confidence: 99%

“…A characteristic "indicator" of this regime is the dimensionless reaction penetration depth for the oxygen transport in the CCL given by [12]:…”

Section: Polarization Curvesmentioning

confidence: 99%

See 2 more Smart Citations

Polarization Curve of a Non-Uniformly Aged PEM Fuel Cell

Kulikovsky

2014

Energies

View full text Add to dashboard Cite

show abstract

“…1 means that J must be much less than the characteristic current densities for the proton and oxygen transport in the CCL. 28 For typical PEMFC parameters (Table I) and the CCL thickness of 10 −3 cm, Eq. 1 holds for the cell current densities below 100 mA cm −2 .…”

Section: Modelmentioning

confidence: 99%

A Fast Low-Current Model for Impedance of a PEM Fuel Cell Cathode at Low Air Stoichiometry

Kulikovsky

2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

We report a physics-based analytical model for low-current PEM fuel cell impedance, which takes into account oxygen transport in the channel. The model is fast: fitting the model impedance to the experimental Nyquist spectrum takes about 2 minutes on a 2-GHz notebook. In addition to the transport and kinetic parameters of the catalyst layer, fitting returns the oxygen diffusion coefficient in the gas-diffusion layer and the resistivity due to oxygen transport in the channel. Maple worksheet with the fitting procedure is available for download.

show abstract

Alkaline Oxygen Electrocatalysis for Fuel Cells and Metal–Air Batteries

Shah

Najam

Brouzgou

et al. 2021

Encyclopedia of Electrochemistry

View full text Add to dashboard Cite

Currently, low‐carbon economy is getting importance and electrochemical energy conversion and storage technologies can play an important role in this development. Fuel cells and metal–air batteries are considered as emerging and potential alternate to conventional combustion engines. However, there are real problems that need to be faced, such as the cost, activity, and stability of electrode materials/electrocatalysts for energy conversion and storage. Recent progress in the materials design and synthesis showed that carbon‐based materials such as metal‐coordinated N‐doped carbons have better performance for oxygen electrocatalysis (OER, ORR) in both fuel cells and batteries. The active sites, an important feature of these catalysts, can be tuned by changing metallic centers, heteroatom‐doping (electronic structure, chemical composition), and porosity of materials derived from several precursors. By combining experimental results and theoretical calculations, facts revealed that the dispersion and chemical environment (elements coordinated with metal atom) in the active sites are significantly affected by the presynthesis and pyrolysis conditions. Therefore, MOF‐based precursors are considered as important due to their porosity and surface area.

show abstract

The regimes of catalyst layer operation in a fuel cell

Cited by 96 publications

References 28 publications

Polarization Curve of a Non-Uniformly Aged PEM Fuel Cell

Polarization Curve of a Non-Uniformly Aged PEM Fuel Cell

A Fast Low-Current Model for Impedance of a PEM Fuel Cell Cathode at Low Air Stoichiometry

Alkaline Oxygen Electrocatalysis for Fuel Cells and Metal–Air Batteries

Contact Info

Product

Resources

About