Corrosion Investigation of Chromium Nitride and Chromium Carbide Coatings for PEM Fuel Cell Bipolar Plates in Simulated Cathode Condition

Ghahfarokhi, H. Haghighat; Saatchi, A.; Monirvaghefi, S. M.

doi:10.1002/fuce.201600005

Cited by 34 publications

(17 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the inability of the metals to withstand corrosion from the fuel cell operating environment poses a significant challenge 15 . Nevertheless, the coating of the metal plates with a layer of carbide or nitride has been shown to provide a reliable solution to the corrosion of the bipolar plates 19 …”

Section: Basic Pemfc Operationmentioning

confidence: 99%

A review of gas diffusion layer properties and water management in proton exchange membrane fuel cell system

2020

View full text Add to dashboard Cite

Proton exchange membrane fuel cells (PEMFCs) can intensely lessen the emissions from the energy sector through environmentally friendly attributes. This evaluation paper summarizes the key additives of the PEMFC which are associated with water formation and delivery inside the cell. The gas diffusion layer (GDL) plays a key role in reactant gas diffusion and water control in proton exchange membrane (PEM) fuel cells. This paper also reviews updated literature regarding various hydrophobic and hydrophilic materials used for the improvement of the GDL and overall PEMFC performance. A style of carbon and steel-based microporous substrates (MPS) and microporous layer (MPL) and their impact in GDL overall performance are provided. Materials' properties that affect the performance of the MPL consisting of pore sizes, porosity, and permeability are additionally reviewed. Visualization of water in the flow channel and techniques to understand the mechanism of flow is reported. The failure modes related to the membrane electrode assembly (MEA) and typical PEMFC degradation are discussed. Prospects for development and addressing the water management and degradation of PEMFC through the exploration of further experimental and numerical studies are presented. Highlights • Proton exchange membrane fuel cells (PEMFCs) can be a good candidate for several applications • The material property of the GDL influences the overall fuel performance • Water transport if not properly managed can cause poor performance and failure of the fuel cell • There is need to understand how the fuel cell failure is related to the

show abstract

Section: Basic Pemfc Operationmentioning

confidence: 99%

A review of gas diffusion layer properties and water management in proton exchange membrane fuel cell system

2020

View full text Add to dashboard Cite

show abstract

“…They are used as a coating over metal surfaces due to its resistance towards wear and corrosion. Significance of Fe-Cr-C alloys as precipitated carbides is also well known in several industries, such as drilling [2,3], mining [4,5], oil and gas [6,7] and fuel cells [8,9].…”

Section: Introductionmentioning

confidence: 99%

Structural and electronic properties of chromium carbides and Fe-substituted chromium carbides

Ganguly

Murthy

Kannoorpatti

2020

Mater. Res. Express

View full text Add to dashboard Cite

Chromium carbides are coated over base metal (Fe) to increase wear and corrosion resistance. The electronic structure and bonding properties for chromium carbide bulk phases (Cr 3 C 2 , Cr 7 C 3 and Cr 23 C 6 ) and Fe-substituted chromium carbides is investigated using Density Functional Theory (DFT). The bonding in these carbides has been interpreted in the form of partial density of states, electron density distribution and Mulliken population method. Cr 3 C 2 exhibits the strongest covalent character while Cr 7 C 3 displays the highest metallicity. Cr 3 C 2 showed the highest stability among the chromium carbide phases. In the Fe-substituted chromium carbides (Cr 2 FeC 2 ), the site preference of Fe in Cr 3 C 2 system has been reported. In Fe-substituted chromium carbides also show both of metallic and covalent character and Cr 2 Fe3C 2 is found to be the most stable Fe-substituted chromium carbide system.

show abstract

“…In current days, electrochemical impedance spectroscopy (EIS) has gained significant relevance in the electrochemistry research field, since this electrochemical measurement technique allows obtaining information on the internal state and on the electrochemical behavior of a large number of electrochemical systems . This electrochemical testing technique has been widely used in the fuel cell field: for fuel cell characterization ; for the study of polymer membrane fuel cells , solid oxide fuel cells and high temperature fuel cells ; for fuel cell diagnosis ; for corrosion tests ; and for fuel cell control .…”

Section: Introductionmentioning

confidence: 99%

Experimental Quantification of the Effect of Nonlinearities on the EIS Spectra of the Cathodic Electrode of an Alkaline Electrolyzer

2017

View full text Add to dashboard Cite

Electrochemical impedance spectroscopy (EIS) is a very powerful tool to study the behavior of electrochemical systems. According to Ohm's generalized law, the impedance concept is only valid if the linearity condition is met. In the case that the linearity condition is not achieved, the obtained impedance spectra will present distortions which may lead to biased or even erroneous results and conclusions. In this work, an experimental quantification of the effect of nonlinearities on EIS spectra was performed in order to determine the order of magnitude of the effect of the nonlinearity of the system on the obtained spectra of the cathodic electrode of an alkaline electrolyzer.

show abstract

Corrosion Investigation of Chromium Nitride and Chromium Carbide Coatings for PEM Fuel Cell Bipolar Plates in Simulated Cathode Condition

Cited by 34 publications

References 25 publications

A review of gas diffusion layer properties and water management in proton exchange membrane fuel cell system

A review of gas diffusion layer properties and water management in proton exchange membrane fuel cell system

Structural and electronic properties of chromium carbides and Fe-substituted chromium carbides

Experimental Quantification of the Effect of Nonlinearities on the EIS Spectra of the Cathodic Electrode of an Alkaline Electrolyzer

Contact Info

Product

Resources

About