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

Lee, Chengkuo

doi:10.1016/j.jpowsour.2012.07.022

Cited by 17 publications

(9 citation statements)

References 47 publications

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“…However, the available composition of electroless plating with Ni is quite limited as exemplified by Ni-Cu-P/graphite composite coatings. 15 Putting it all together, the co-electrodeposition of Ni and carbon could be a promising solution to the practical bipolar plate manufacturing method. Addition of carbon into Ni plating solution for the formation of composite materials has been proven to endow better mechanical properties besides improving the corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Passivation Behavior and Surface Resistance of Electrodeposited Nickel-Carbon Composites

et al. 2014

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Bipolar plates in fuel cells and redox flow batteries are one of the most expensive components, which become a crucial factor for their commercialization. In this report, nickel and carbon are co-electrodeposited from Watts solution containing carbon black powder, and the Ni-C composites are characterized by SEM, EDS, XRD and surface profilometry. The intrinsic passivation behavior and the sheet resistance of Ni-C are on a par with pure Ni when carbon is introduced less than 26 at% in the composite, but the introduction of carbon to Ni suppresses the increase in sheet resistance after a storage corrosion test, which invites the expectation of high durability as bipolar plate materials. This kind of approach where carbon is introduced to metal-based bipolar plates by electrodeposition can improve the surface properties of pure metal bipolar plates with maintaining their price competitiveness over graphite-based composites and other high cost manufacturing techniques.

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Section: Introductionmentioning

confidence: 99%

Passivation Behavior and Surface Resistance of Electrodeposited Nickel-Carbon Composites

et al. 2014

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“…The plated Ni particles also have relatively high polarity, consequently, the GO were bonded by Ni particles, GO-Ni particles deposited in the holes. But the growth of Ni particles was stoped when its surface tightly coated with GO 19 – 21 . The GO dispersion contained surfactant which could improve the surface wettability of PA12 powder.…”

Section: Resultsmentioning

confidence: 99%

Preparation of nickel/PA12 composite particles by defect-induced electroless plating for use in SLS processing

Gui

Chen

Yao³

et al. 2018

Sci Rep

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In this work, Ni particles/PA12 powders (Ni/PA12) and graphite oxide (GO)-encapsulated Ni particles/PA12 powders (GO-Ni/PA12) composite powders were prepared by defect-included electroless plating technique, and its laser sintered behaviour was investigated. Results showed that a lot of defects could formed on the surface of CH3COOH etched PA12 powders. The defects would induce Ni and GO-Ni particles independently plated on the PA12 surface. Adding GO in the plating solution would facilitate the deposition of Ni particles, GO, and NiO on the PA 12 surface, but inhibit the growth and the crystallinity of the Ni particles. The SLS process involved the contact of PA12 powders, the formation of sintering neck, the growth of sintering neck and the formation of fused solid. Sintering process could facilitate the re-arrangement of Ni particles due to surface tension and the growth of sintering neck. The Ni particles had well wettability, and the interfaces between Ni particles and PA 12 were contacted soundly. The tensile strength and bending strength of the 10 W-sintered Ni/PA12 specimen were 50 MPa and 60 MPa. But SLS process caused the serious aggregation of GO-Ni particles due to higher concentration, activity and surface area of GO-Ni particles.

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“…As graphite is nobler than nickel, presence of graphite increases microcell formation, where nickel acts as the anode and graphite as the cathode in these microcells. This phenomenon facilitates anodic polarization and reduces localized corrosion (Lee, 2012;Abdel Aal, 2008). Furthermore, graphite incorporation increases corrosion resistance by reducing metallic area available for corrosion, similar to what was observed when SiC was incorporated in the NiP alloy (Bigdeli and Allahkaram, 2009).…”

Section: Discussionmentioning

confidence: 99%

Characterization of NiBP-graphite composite coatings deposited by dynamic chemical plating

Omidvar

Sajjadnejad

Stremsdoerfer

et al. 2015

Anti-Corrosion Methods and Materials

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Purpose -This paper aims to coat ternary composite NiBP-graphite films by Dynamic Chemical Plating "DCP" technique with a growth rate of at least 5 m/h, which makes this technique a worthy candidate for production of composite films. Electroless nickel plating method can be used to deposit nickel-phosphorous and nickel-boron coatings on metals or plastic surface. However, restrictions such as toxicity, short lifetime of the plating-bath and limited plating rate have limited applications of conventional electroless processes. Design/methodology/approach -DCP is an alternative for producing metallic deposits on non-conductive materials and can be considered as a modified electroless coating process. Using a double-nozzle gun, two different solutions containing the precursors are sprayed simultaneously and separately onto the surface. With this technique, NiBP-graphite films are fabricated and their corrosion and tribological properties are investigated. Findings -With a film thickness of 2 m, tribological analysis confirms that these coatings have favorable anti-friction and anti-wear properties. Corrosion resistance of NiBP-graphite composite films was investigated, and it was found that graphite incorporation significantly enhances corrosion resistance of NiBP films. Originality/value -DCP is faster and simpler to perform compared to other electroless deposition techniques. Using a double-nozzle gun, metal salt solution and reducing agents are sprayed to the surface, forming a deposit. Previously, coatings such as Cu, Cu-graphite, Cu-PTFE, Ni-B-TiO2, Ni-P, Ni-B-P and Ni-B-Zn with favorable compactness and adherence by DCP were reported. In this paper, the authors report the application of the DCP technique for depositing NiBP-PTFE nanocomposite films.

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

Cited by 17 publications

References 47 publications

Passivation Behavior and Surface Resistance of Electrodeposited Nickel-Carbon Composites

Passivation Behavior and Surface Resistance of Electrodeposited Nickel-Carbon Composites

Preparation of nickel/PA12 composite particles by defect-induced electroless plating for use in SLS processing

Characterization of NiBP-graphite composite coatings deposited by dynamic chemical plating

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