Preparation and characterization of Ni-plated polytetrafluoroethylene plate as an electrode for alkaline fuel cell

Kinoshita, Hirotaka; Yonezawa, Suguru; Kim, Jae-Ho; Kawai, Masayuki; Takashima, Masayuki; Tsukatani, Toshihide

doi:10.1016/j.jpowsour.2008.05.056

Cited by 6 publications

(3 citation statements)

References 38 publications

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“…However, other alternatives are possible and may be borrowed from the eld of liquid (aqueous) AFCs: e.g. see the review by Bidault et al 2q For example Nickel coated PTFE shows an electronic conductivity of 300 S m À1 ; 304 Ni foam may also be a suitable alternative. 305 One particularly interesting area is the production of combined catalyst/reactant transport layers utilising a porous Ag membrane.…”

Section: The Need For Carbon Free Catalyst Supports At High Phsmentioning

confidence: 99%

Anion-exchange membranes in electrochemical energy systems

Varcoe

Atanassov²,

Dekel³

et al. 2014

Energy Environ. Sci.

1,738

1,506

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Section: The Need For Carbon Free Catalyst Supports At High Phsmentioning

confidence: 99%

Anion-exchange membranes in electrochemical energy systems

Varcoe

Atanassov²,

Dekel³

et al. 2014

Energy Environ. Sci.

1,738

1,506

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“…However, the hydrophobic nature of the membrane prevents the penetration of aqueous solutions into the pores, while the pore size and shape determine the diffusion or convection across the membrane. Therefore, hydrophilic modifications of PTFE are beneficial for dyeing, metal plating, and other coating needs [ 21 , 22 , 23 , 24 , 25 ]. Common surface modification methods, such as sodium naphthalene chemical treatment, high-temperature sintering, and irradiation grafting, have been carried out [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Dyeable Hydrophilic Surface Modification for PTFE Substrates by Surface Fluorination

Kobayashi

Nishimura²,

Kim³

et al. 2023

Membranes

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Polytetrafluoroethylene (PTFE) is the most widely used fluoropolymer that has various functionalities such as heat resistance, chemical resistance, abrasion resistance, and non-adhesiveness. However, PTFE is difficult to dye because of its high water repellency. In this study, the PTFE surface was modified by a combination of gold sputtering and surface fluorination to improve dyeability. X-ray photoelectron spectroscopy indicated that, compared with the untreated sample, the gold-sputtered and acid-washed surface of PTFE had a negligible number of C–F terminals. Furthermore, the intensity of the C–C peak increased drastically. The polar groups (C=O and C–Fx) increased after surface fluorination, which enhanced the electronegativity of the surface according to the zeta potential results. Dyeing tests with methylene blue basic dye showed that the dye staining intensity on the surface of fluorinated PTFE samples was superior to other samples. It is due to the increased surface roughness and the negatively charged surface of fluorinated PTFE samples. The modified PTFE substrates may find broad applicability for dyeing, hydrophilic membrane filters, and other adsorption needs.

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“…Nickel and nickel phosphorous coatings characterized with excellent combinations of corrosion resistance, hardness and wear resistance have numerous applications in mechanical and process engineering equipments (Zhao and Liu, 2006), fuel cells (Kinoshita et al, 2008), printed circuit boards (Siau et al, 2005), membrane technology (Haag et al, 2006) and space applications (Saxena et al, 2006). Electroless plating process is one of the most conventional methods deployed to yield uniform nickel and nickel alloy coatings using sodium hypophosphite as a reducing agent (Narayanan et al, 2003;Bi et al, 2009;Jiang et al, 2009).…”

Section: Introductionmentioning

confidence: 99%