Initial Interfacial Contact Resistance of Metallic Bipolar Plates

2019 ◽  
Vol 41 (1) ◽  
pp. 1839-1852
Author(s):  
Leonard Bonville ◽  
H. R. Kunz ◽  
Ludwig Lipp ◽  
Joshua McCabe ◽  
Manoj Mahapatra ◽  
...  
Keyword(s):  
Contact Resistance ◽  
Bipolar Plates ◽  
Metallic Bipolar Plates ◽  
Interfacial Contact ◽  
Interfacial Contact Resistance

scholarly journals Effect of Cr content on the corrosion resistance of Ni–Cr–P coatings for PEMFC metallic bipolar plates

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Uttam K. Chanda ◽  
Satya Prakash Padhee ◽  
Anil D. Pathak ◽  
Sudesna Roy ◽  
Soobhankar Pati
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Contact Resistance ◽  
Bipolar Plates ◽  
Metallic Bipolar Plates ◽  
Cr Content ◽  
Stable Oxide ◽  
Interfacial Contact ◽  
Oxide Barrier ◽  
Interfacial Contact Resistance

Abstract In here, we report on the pulse electrodeposition of nickel–chromium–phosphorous (Ni–Cr–P) coatings on AISI 1020 low carbon steel using an aqueous electrolyte consisting of NiCl2, CrCl3, and NaH2PO2. We evaluated the effectiveness of Ni–Cr–P coatings for polymer electrolyte membrane fuel cell metallic bipolar plates. Coatings deposited at pH 3.0 and room temperature show nearly three orders improvement in corrosion resistance compared to bare AISI 1020. The corrosion current (Icorr) of Ni–Cr–P samples coated at 25 °C is 1.16 × 10−4 A/cm2, while that of bare carbon steel is 1.05 × 10−2 A/cm2. The improvement in corrosion resistance is due to the increase in Cr content in the Ni–Cr–P coatings. Cr forms a stable oxide barrier layer and inhibits pitting corrosion. The interfacial contact resistance increases with an increase in Cr content and immersion time in the corrosion media. The increase in interfacial contact resistance is also due to the formation of a stable oxide barrier.

Preparation and Characterization of TiN-SBR Coating on Metallic Bipolar Plates for Polymer Electrolyte Membrane Fuel Cell

2017 ◽  
Vol 20 (4) ◽  
pp. 169-173
Author(s):  
Huihui Zhang ◽  
Juntao Yuan ◽  
Ming Zhu
Keyword(s):  
Corrosion Resistance ◽  
Fuel Cell ◽  
Contact Resistance ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Styrene Butadiene Rubber ◽  
Bipolar Plates ◽  
Electrolyte Membrane ◽  
Interfacial Contact ◽  
Interfacial Contact Resistance

In order to reduce interfacial contact resistance (ICR) and enhance corrosion resistance of 310 stainless steel (310 SS) for bipolar plates (BPs) of polymer electrolyte membrane fuel cell (PEMFC), TiN with styrene-butadiene rubber (SBR) coating was prepared by using electrophoretic deposition. Microstructure of TiN-SBR coated 310 SS prepared under different conditions was characterized by scanning electron microscopy (SEM), and a uniform, dense and well-bonded TiN-SBR coating was prepared at 30 V for 10 s in the suspension liquid containing 6.0 g/L SBR. Polarization behavior in the simulated service environment of PEMFC (1 M H2SO4 at 298 K) and ICR of the TiN-SBR coating deposited under the optimized conditions were investigated. The results showed that the TiN-SBR coating successfully decreased the anodic polarization current and ICR, indicating excellent interfacial contact resistance and corrosion resistance.

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

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2682
Author(s):  
Tereza Bohackova ◽  
Jakub Ludvik ◽  
Milan Kouril
Keyword(s):  
Corrosion Resistance ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Contact Resistance ◽  
Material Selection ◽  
Passive Layer ◽  
Proton Exchange ◽  
Bipolar Plates ◽  
Interfacial Contact ◽  
Interfacial Contact Resistance

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.

scholarly journals Effects of CrN/TiN Coatings on Interfacial Contact Resistance of Stainless Steel 410 Bipolar Plates in Fuel Cells

2021 ◽  
pp. 133-139
Author(s):  
Mohsen Forouzanmehr ◽  
Kazem Reza Kashyzadeh ◽  
Amirhossein Borjali ◽  
Mosayeb Jafarnode ◽  
Mahmoud Chizari
Keyword(s):  
Stainless Steel ◽  
Fuel Cells ◽  
Contact Resistance ◽  
Coated Sample ◽  
Bipolar Plates ◽  
Tin Coatings ◽  
Interfacial Contact ◽  
Cathodic Arc Evaporation ◽  
Interfacial Contact Resistance ◽  
Arc Evaporation

AbstractChallenge on energy resources exists, especially when the fossil resources are limited. Fuel cells, as an alternative replacement, can be used. Fuel cells with coated bipolar plates are the interest of this paper. Current research is concerned with the effects of CrN/TiN coatings on interfacial contact resistance (ICR). Stainless steel 410 was selected as a base metal, and the coating process was performed using chromium nitride and titanium nitride by cathodic arc evaporation method. It was found that the surface roughness and ICR values of CrN-coated sample are lower than the TiN-coated sample. The concluded that the CrN layer could be replaced with the TiN layer for better performance of bipolar plates.

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