Study of different aluminum alloy substrates coated with Ni–Co–P as metallic bipolar plates for PEM fuel cell applications

Fetohi, Amani E.; Hameed, R.M. Abdel; El–Khatib, K.M.; Souaya, Eglal R.

doi:10.1016/j.ijhydene.2012.04.066

Cited by 31 publications

(11 citation statements)

References 51 publications

(49 reference statements)

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“…Although authors consistently report that fuel cell operation is associated with elevated temperatures of around 70-80 • C, many of them perform simulations only at laboratory temperatures [40][41][42][43][44]. The choice of temperature can, in principle, affect the course of the corrosion process; while at room temperature, the material can show satisfactory values, at 70 • C its passivation ability and the stability of the passive layer can be reduced or even disappear [45,46].…”

Section: Electrochemical Testing Methodsmentioning

confidence: 99%

Metallic Material Selection and Prospective Surface Treatments for Proton Exchange Membrane Fuel Cell Bipolar Plates—A Review

2021

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The aim of this review is to summarize the possibilities of replacing graphite bipolar plates in fuel-cells. The review is mostly focused on metallic bipolar plates, which benefit from many properties required for fuel cells, viz. good mechanical properties, thermal and electrical conductivity, availability, and others. The main disadvantage of metals is that their corrosion resistance in the fuel-cell environment originates from the formation of a passive layer, which significantly increases interfacial contact resistance. Suitable coating systems prepared by a proper deposition method are eventually able to compensate for this disadvantage and make the replacement of graphite bipolar plates possible. This review compares coatings, materials, and deposition methods based on electrochemical measurements and contact resistance properties with respect to achieving appropriate parameters established by the DOE as objectives for 2020. An extraordinary number of studies have been performed, but only a minority of them provided promising results. One of these is the nanocrystalline β-Nb2N coating on AISI 430, prepared by the disproportionation reaction of Nb(IV) in molten salt, which satisfied the DOE 2020 objectives in terms of corrosion resistance and interfacial contact resistance. From other studies, TiN, CrN, NbC, TiC, or amorphous carbon-based coatings seem to be promising. This paper is novel in extracting important aspects for future studies and methods for testing the properties of metallic materials and factors affecting monitoring characteristics and parameters.

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Section: Electrochemical Testing Methodsmentioning

confidence: 99%

Metallic Material Selection and Prospective Surface Treatments for Proton Exchange Membrane Fuel Cell Bipolar Plates—A Review

2021

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“…The main problems associated with metallic materials are their inability to resist corrosion in a weakly acidic medium inside the PEMFC and the formation of passive films and metal ions. The formation of passive films increases the contact resistance, while the dissolution of metals contaminates the membrane electrodes [2]. To solve this problem, various protective coatings with high electrical conductivities have been proposed to protect the metallic bipolar plates to achieve high corrosion resistance and low contact resistance [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Effects of Substrate Temperature on the Corrosion Behaviour of Nanochromium Coatings Deposited by Direct Current Magnetron Sputtering

Ren

Chen

Chang

et al. 2016

Journal of Nanomaterials

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Nanochromium coatings were deposited on 316L stainless steel bipolar plates of a proton-exchange membrane fuel cell (PEMFC) by a direct current magnetron sputtering technique. The effect of substrate temperature on the corrosion resistance of nanochromium coatings was investigated. The corrosion performance of the bare and chromium-coated steel in a simulated environment of PEMFC (0.5 M H2SO4+ 2 ppm F−) was studied using electrochemical impedance spectroscopy, polarisation, and open circuit potential measurements. The results showed that the corrosion rates of two nanochromium coatings deposited at 300°C and 500°C were lower than those of uncoated steel by more than one order of magnitude. Electrochemical impedance spectra of both nanochromium coatings exhibited distinct characteristics in corrosive solution. The nanochromium coating deposited at 500°C showed superior stability in the corrosive solution.

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“…The solutions are to increase the use of noble metals such as platinum or gold, which increases costs, or to use cheaper metals such as aluminum alloy and stainless steel, which require protective coatings. Some coated aluminum alloys have proven suitable candidates for bipolar plate materials because of their high corrosion resistance and stable PEM outputs [14,15,21,22]. One of the most promising coating technologies is electroless deposition, which is widely used for enhancing physical and mechanical properties such as corrosion and wear resistance of metallic materials.…”

Section: Introductionmentioning

confidence: 99%

Electroless Ni–Cu–P/nano-graphite composite coatings for bipolar plates of proton exchange membrane fuel cells

Lee

2012

Journal of Power Sources

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Study of different aluminum alloy substrates coated with Ni–Co–P as metallic bipolar plates for PEM fuel cell applications

Cited by 31 publications

References 51 publications

Metallic Material Selection and Prospective Surface Treatments for Proton Exchange Membrane Fuel Cell Bipolar Plates—A Review

Metallic Material Selection and Prospective Surface Treatments for Proton Exchange Membrane Fuel Cell Bipolar Plates—A Review

Effects of Substrate Temperature on the Corrosion Behaviour of Nanochromium Coatings Deposited by Direct Current Magnetron Sputtering

Electroless Ni–Cu–P/nano-graphite composite coatings for bipolar plates of proton exchange membrane fuel cells

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