Composite-coated aluminum bipolar plates for PEM fuel cells

Mawdsley, Jennifer R.; Carter, J. David; Wang, Xiaoping; Niyogi, Suhas; Fan, Chinbay Q.; Koç, Raşit; Osterhout, George

doi:10.1016/j.jpowsour.2012.12.074

Cited by 71 publications

(40 citation statements)

References 12 publications

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“…Some metals like stainless steel and titanium are general stable when they are used in fuel cells because they have low pH due to passivation for good corrosion characteristics. Stainless steel and titanium have strong mechanical strength and the gas permeation rate is low [188][189][190][191][192][193][194][195][196][197][198][199][200][201]. Several investigations have been conducted using stainless steel and titanium because even in acidic conditions, titanium and stainless steel still maintain their properties.…”

Section: Metalsmentioning

confidence: 99%

Effect of Bipolar Plate Materials on Performance of Fuel Cells

Wilberforce

Ijaodola

Ogungbemi

et al. 2018

Reference Module in Materials Science and Materials Engineering

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Section: Metalsmentioning

confidence: 99%

Effect of Bipolar Plate Materials on Performance of Fuel Cells

Wilberforce

Ijaodola

Ogungbemi

et al. 2018

Reference Module in Materials Science and Materials Engineering

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“…Aluminum and its alloys offer advantages with respect to stainless steel as a material for bipolar plates in PEMFCs because of its lower density, lower bulk electrical resistivity, higher thermal conductivity and less costs , . The potential weight reduction has obvious advantages in transportation applications because there are about 700 bipolar plates in each automotive PEM fuel cell stack .…”

Section: Introductionmentioning

confidence: 99%

“…Coatings should have: (i) excellent adhesion to the substrate, (ii) good electrical conductivity and (iii) a coefficient of thermal expansion similar to that of the metallic substrate. Several types of coatings have been applied to aluminum, such as fluoropolymer/TiC composite , metallic nitrides , conversion coatings and electrically conductive polymer composite .…”

Section: Introductionmentioning

confidence: 99%

Zincating Effect on Corrosion Resistance of Electroless Ni‐P Coating on Aluminum Alloy 6061

Gutiérrez

Pech‐Canul²,

Sebastian

2017

Fuel Cells

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Aluminum and its alloys represent a promising alternative as bipolar plates in proton exchange membrane fuel cell (PEMFC) systems. However, to improve the corrosion resistance they are commonly coated, and electroless Ni‐P offers great advantages. The effect of multiple zincating process on the corrosion behavior of electroless Ni‐P coatings on AA6061 was investigated. Results of morphological characterization and compositional analysis of the electroless Ni‐P coatings showed that as the number of zincating steps increased, the surface became smoother (with decreasing roughness) and the phosphorous content increased. The results of electrochemical impedance measurements and potentiodynamic polarization curves in 0.5M H2SO4 solution showed that the pretreatment used before coating of aluminum with Ni‐P has a direct effect on corrosion resistance. The corrosion current density decreased with increasing the number of zincating steps. A significant improvement in corrosion resistance was observed on performing the triple zincating.

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“…However, its low toughness, gas permeability and the difficulties in machining gas flow channels increase fabrication costs and the overall size of a PEFC stack [6]. In lieu of this, considerable effort has been made into the development of metallic bipolar plates, from materials such as stainless steel and titanium and aluminum alloys [7,8]. Compared with stainless steels, titanium alloys not only exhibit a higher corrosion resistance in highly acidic and humid conditions, but also have a higher specific strength, and thereby high volumetric and gravimetric power densities, particularly suitable for portable PEM systems [3].…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of a ZrCN coated Ti alloy with potential application as a bipolar plate for proton exchange membrane fuel cell

Huang

et al. 2016

Journal of Alloys and Compounds

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a b s t r a c tTo improve the corrosion resistance, surface electrical conductivity and wettability of Tie6Ale4V used in polymer electrolyte membrane fuel cell (PEMFC), a ZrCN nanocrystalline coating was deposited on Ti e6Ale4V substrate using double cathode glow discharge technique. The new coating exhibited a nanocomposite structure, consisting of amorphous C, CN x and nanocrystalline ZrCN. The effect of the HF concentrations on the corrosion behavior of the coating was investigated by potentiodynamic, potentiostatic polarizations and electrochemical impedance spectroscopy (EIS) in a simulated the operating conditions of a PEMFC. With increasing HF concentrations, the corrosion potential (E corr ) decreased and the corrosion current density (i corr ) of the ZrCN coating increased, indicating that corrosion resistance decreased with the increase of HF concentrations. However, at any given concentration of HF, the corrosion resistance of the ZrCN coating was significantly higher than that of uncoated Tie6Ale4V. The results of EIS measurements showed that with increasing the concentration of HF, the resistance of the passive film (R b ) formed on the ZrCN coating decreased slightly, being of the order of magnitude of 10 7 U cm 2 , which was an improvement by four orders of magnitude compared to uncoated Ti-6A1-4V. At a compaction force of 140 N cm À2 , no perceptible difference in the interfacial contact resistance (ICR)of ZrCN-coated Ti-6A1-4V was observed before and after potentiostatic polarization for 120 min, and its ICR values were reduced by one order of magnitude in comparison to that of uncoated Ti-6A1-4V. Moreover, ZrCN-coated Ti-6A1-4V exhibited a much low surface wettability than uncoated Tie6Ale4V alloy, which was beneficial for both water management and improving corrosion resistance.

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Composite-coated aluminum bipolar plates for PEM fuel cells

Cited by 71 publications

References 12 publications

Effect of Bipolar Plate Materials on Performance of Fuel Cells

Effect of Bipolar Plate Materials on Performance of Fuel Cells

Zincating Effect on Corrosion Resistance of Electroless Ni‐P Coating on Aluminum Alloy 6061

Corrosion behavior of a ZrCN coated Ti alloy with potential application as a bipolar plate for proton exchange membrane fuel cell

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