Triple phase boundary and power density enhancement in PEMFCs of a Pt/C electrode with double catalyst layers

Dao, Dung Van; Adilbish, Ganpurev; Le, Thanh Duc; Lee, In Hwan; Yu, Yeon–Tae

doi:10.1039/c9ra01741k

Cited by 28 publications

(19 citation statements)

References 25 publications

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“…Water is produced and must be drained to the BP via the GDL to prevent cathode flooding. Conversely ionomer channel enables protons to migrate from the membrane while electronically conductive network (carbon and metal) ensures the electron transport from the electric load via BP and GDL [23,24]. The non-catalyzed ORR is slow.…”

Section: The Electrode Active Layer (Al)mentioning

confidence: 99%

Hydrogen Fuel Cell Road Vehicles: State of the Art and Perspectives

Béthoux

2020

Energies

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Driven by a small number of niche markets and several decades of application research, fuel cell systems (FCS) are gradually reaching maturity, to the point where many players are questioning the interest and intensity of its deployment in the transport sector in general. This article aims to shed light on this debate from the road transport perspective. It focuses on the description of the fuel cell vehicle (FCV) in order to understand its assets, limitations and current paths of progress. These vehicles are basically hybrid systems combining a fuel cell and a lithium-ion battery, and different architectures are emerging among manufacturers, who adopt very different levels of hybridization. The main opportunity of Fuel Cell Vehicles is clearly their design versatility based on the decoupling of the choice of the number of Fuel Cell modules and hydrogen tanks. This enables manufacturers to meet various specifications using standard products. Upcoming developments will be in line with the crucial advantage of Fuel Cell Vehicles: intensive use in terms of driving range and load capacity. Over the next few decades, long-distance heavy-duty vehicles and fleets of taxis or delivery vehicles will develop based on range extender or mild hybrid architectures and enable the hydrogen sector to mature the technology from niche markets to a large-scale market.

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Section: The Electrode Active Layer (Al)mentioning

confidence: 99%

Hydrogen Fuel Cell Road Vehicles: State of the Art and Perspectives

Béthoux

2020

Energies

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“…Then, this method was further improved by the rational design of a dual-functional catalyst layer with different hydrophilic/hydrophobic features (Figure A), showing better water management capabilities . Recently, Dao et al confirmed the enhancement of TPBs and the PEMFC performance with the double catalyst layer (DCL) design shown in Figure B, realized by a new spray and electrophoresis (EPD) method . Other attempts have also been made by synthesizing nanostructured or doped carbon substrates for Pt loading.…”

Section: Game Changers: Improved Transport Pathways Engineered By Nov...mentioning

confidence: 99%

“…Preparation processes of a dual-layer-structured catalyst layer by the (A) high-temperature direct spray deposition method and (B) spray + EPD method, (C) ORR kinetics and transport processes for the carbon substrate with different pore structures, and (D) precise dispersion of both the ionomer and Pt realized by the N doping of the carbon substrates …”

Section: Game Changers: Improved Transport Pathways Engineered By Nov...mentioning

confidence: 99%

“…89 Recently, Dao et al confirmed the enhancement of TPBs and the PEMFC performance with the double catalyst layer (DCL) design shown in Figure 7B, realized by a new spray and electrophoresis (EPD) method. 90 Other attempts have also been made by synthesizing nanostructured or doped carbon substrates for Pt loading. Yarlagadda et al 91 boosted the MEA performance with accessible carbon mesopores in the range of 4−7 nm (Figure 7C), which achieved both excellent transport properties and ORR activities without compromising either one.…”

Section: Game Changers: Improved Transport Pathways Engineered By Nov...mentioning

confidence: 99%

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Understanding and Engineering of Multiphase Transport Processes in Membrane Electrode Assembly of Proton-Exchange Membrane Fuel Cells with a Focus on the Cathode Catalyst Layer: A Review

Deng

Zhang

et al. 2020

Energy Fuels

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The development of proton-exchange membrane fuel cell (PEMFC) technology will give rise to a great evolution toward a more sustainable and eco-friendly life by powering clean electric vehicles or stations. However, several vital problems still hinder the commercialization of PEMFCs. The foremost issue is the high cost compared to the contenders, deriving from both the high consumption of Pt catalysts and low service life under practical operations. In this review, deeper investigations on how to further lower the cost of PEMFCs show the importance of understanding and engineering the multiphase transport processes in the membrane electrode assembly (MEA). The definitions, rules, numerical simulations, and experimental validations of various mass transfer processes across the MEA are introduced to provide a holistic evaluation and enable optimization to improve the cell performance and reliability. In addition, because the sluggish oxygen reduction reaction in the cathode catalyst layer (CCL) requires most of the Pt catalysts, the oxygen/water-related multiphase transfer in CCLs is taken as a focus for detailed analysis. Several successful strategies, such as triple-phase boundary engineering, graded design, and novel ordered three-dimensional structure construction, are proven to be promising in greatly reducing the Pt consumption in the CCL and facilitating the microscopic multiphase transfer processes of the MEA. With optimized engineering of the electrode structure and configuration inside the MEA, the mass transfer resistances can be minimized to give the best operating conditions for electrochemical reactions to occur in the catalyst layers. Finally, the main challenges and some perspectives for developing advanced MEAs with lower cost in high-performance and reliable PEMFCs are provided.

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“…The ECSA values were calculated from the hydrogen adsorption region in the negative-going potential scan of the CVs. 17,18 The utilization efficiency of the Pt/BiPyPBI/ CB catalyst was then determined to evaluate the preparation process of the catalyst in comparison to the commercial Pt/CB catalyst (see Table 1). 19 The specic surface area (SSA) was determined from the following equation.…”

Section: Electrochemical Surface Area (Ecsa) and Oxygen Reduction Reamentioning

confidence: 99%

Poly[2,2′-(4,4′-bipyridine)-5,5′-bibenzimidazole] functionalization of carbon black for improving the oxidation stability and oxygen reduction reaction of fuel cells

Berber

Mustafa

2020

RSC Adv.

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Triple phase boundary and power density enhancement in PEMFCs of a Pt/C electrode with double catalyst layers

Abstract: Pt/C double catalyst layers (DCL), serving as an anodic electrode, have been utilized in a PEMFC application for the first time.

Cited by 28 publications

References 25 publications

Hydrogen Fuel Cell Road Vehicles: State of the Art and Perspectives

Hydrogen Fuel Cell Road Vehicles: State of the Art and Perspectives

Understanding and Engineering of Multiphase Transport Processes in Membrane Electrode Assembly of Proton-Exchange Membrane Fuel Cells with a Focus on the Cathode Catalyst Layer: A Review

Poly[2,2′-(4,4′-bipyridine)-5,5′-bibenzimidazole] functionalization of carbon black for improving the oxidation stability and oxygen reduction reaction of fuel cells

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