Enhanced hydrophobicity of GDL by a novel coating process in PEM fuel cells

Yoon, Gug-Ho; Park, Yong-il

doi:10.1007/s12541-012-0153-9

Cited by 14 publications

(7 citation statements)

References 25 publications

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“…Kitahara et al demonstrated that coating the GDL with hydrophilic carbon nanotubes (CNTs) showed superior performance at a CNT content of 4 mass%. Yoon and Park reported that the performance of GDL coated with (heptadecafluoro‐1,1,2,2‐tetrahydrodecyl) triethoxysilane (HTTS) surpassed that of a PTFE‐coated GDL. Ko et al used GDLs coated with hydrophobic silicone (ie, hexamethyldisiloxane) through a “dry” deposition process and under severe flooding conditions, which imparted enhanced operational stability to the PEMFCs.…”

Section: Introductionmentioning

confidence: 99%

Reduced graphene oxide–coated anode gas diffusion layer for performance enhancement of proton‐exchange membrane fuel cell

et al. 2019

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Summary In this study, we produced reduced graphene oxide (RGO) by reduction of graphene oxide (GO) in Teflon‐lined autoclave, maintained at 100°C for 12 hours, and coated on the anode gas diffusion layer (GDL) of a proton‐exchange membrane fuel cell (PEMFC) to improve the cell performance. Fourier transform infrared spectroscopy and X‐ray photoelectron spectroscopy analysis showed the presence of residual oxygen‐containing functional groups in RGO. Field‐emission scanning electron microscopy images revealed the uniform and adequate coating of the GDLs with RGO. The wettability of RGO‐coated GDL was determined by the sessile drop method and has optimum contact angle 117°. The power densities for the membrane electrode assembly (MEA) with RGO coated on the anode GDL were 30.92%, 41%, and 36.20% higher than those for the MEA without the RGO coating at anode gas humidified temperatures of 25°C, 45°C, and 65°C, respectively.

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Section: Introductionmentioning

confidence: 99%

Reduced graphene oxide–coated anode gas diffusion layer for performance enhancement of proton‐exchange membrane fuel cell

et al. 2019

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“…Carbon paper used as a GDL allows the reactant gases to reach the reaction zones and the product water move out. To perform these functions effectively, carbon paper should have high porosity of 50%-90% (Yoon & Park, 2013); the porosity of PTFE-treated CCP satisfied this requirement. The effect of PTFE treatment on the electrical properties of carbon paper can be seen from the through-plane conductivity values listed in Table 2.…”

Section: Effect Of Ptfe Treatment On Physical Properties Of Ccpmentioning

confidence: 99%

Preparation and Characterization of Carbon Composite Paper from Coconut Coir for Gas Diffusion Layer

Destyorini

Subhan

Indayaningsih

et al. 2016

IJTech

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The gas diffusion layer (GDL) is one of the critical components of a proton exchange membrane fuel cell (PEMFC). It is generally made of a fossil-fuel-based carbon material. In this study, carbon composite paper (CCP) for GDL was prepared by using carbon material obtained from coconut coir. To obtain the CCP, 80 wt% carbon material from the coconut coir and 20 wt% polymer binder (ethylene vinyl acetate and polyethylene glycol) were mixed in xylene solvent at 100°C, cast on molded glass, and then rolled. The carbon material consists of a mixture of carbon fibers (length: 2 mm) and powders (size: 74 µm). Subsequently, the CCP was treated with polytetrafluoroethylene solution (10 wt%). The physical properties of the CCPs, such as through-plane electrical conductivity, porosity, density, and hydrophobic properties, were investigated. Scanning electron microscopy and energy-dispersive spectroscopy mapping were used to analyze the morphology and polytetrafluoroethylene (PTFE) distribution in the CCP. The through-plane conductivity test showed that CCP with 70 wt% carbon fiber, 10 wt% carbon powder, and 20 wt% polymer was the optimum sample, and it showed the highest electrical conductivity of 2.22 S cm -1 . The physical properties of PTFEtreated CCP, such as porosity, density, and contact angle, were almost similar to that of commercial carbon paper used as a GDL. Therefore, the CCP prepared from coconut coir can be applied as a GDL in a PEMFC.

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“…Among several polymers that are often utilized as mechanical components, polytetrafluoroethylene (PTFE) is an especially important industrial polymer as it is chemically stable and has relatively low friction coefficient . PTFE is generally used as an anti‐adhesion coating due to its low surface energy and good hydrophobicity . However, PTFE also has disadvantages of having relatively low mechanical strength and poor wear resistance .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of polytetrafluoroethylene–carbon nanotube composite coatings for friction and wear reduction

et al. 2016

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Polytetrafluoroethylene (PTFE) matrix with inherently low friction was prepared in the form of a coating and reinforced with carbon nanotubes (CNTs) to enhance its wear resistance. PTFE–CNT composite coatings with various CNT contents were deposited on silicon (100) substrates by spin coating followed by a heat treatment process. The effects of cooling rate during the heat treatment process on the morphology, mechanical properties as well as friction and wear behavior of the coatings were investigated under different loading conditions. It was revealed that the slow‐cooled PTFE–CNT composite coating containing 1 wt% and 5 wt% CNT had the highest wear resistance with respect to the applied normal load. The overall experimental results demonstrated that, in comparison to pure PTFE coating, the friction and wear behavior of PTFE–CNT composite coatings could be improved by incorporating an optimum amount of CNT in the PTFE matrix and performing the heat treatment under a specified condition. POLYM. COMPOS., 39:E710–E722, 2018. © 2016 Society of Plastics Engineers

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Enhanced hydrophobicity of GDL by a novel coating process in PEM fuel cells

Cited by 14 publications

References 25 publications

Reduced graphene oxide–coated anode gas diffusion layer for performance enhancement of proton‐exchange membrane fuel cell

Reduced graphene oxide–coated anode gas diffusion layer for performance enhancement of proton‐exchange membrane fuel cell

Preparation and Characterization of Carbon Composite Paper from Coconut Coir for Gas Diffusion Layer

Fabrication of polytetrafluoroethylene–carbon nanotube composite coatings for friction and wear reduction

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