Silane-functionalized carbon with super-hydrophobicity advancing microporous layer for proton exchange membrane fuel cells

Zhang, Qian; Gu, Tianyi; Shi, Ruhua; Yan, Jun; Wang, Wei; Qian, Wei; Zhai, Bowen; Ming-zheng, Zhou; Chai, Maorong; Yang, Ruizhi

doi:10.1016/j.jpowsour.2022.232342

Cited by 10 publications

(4 citation statements)

References 44 publications

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“…Considering the balanced water and gas transport, one of the structures of PEMFCs, the gas diffusion layer, provides uniform gas transport, facilitates water drainage at high relative humidity, and reduces water loss at low relative humidity 147 . By chemical modifications, the water contact angle can be up to 150° superhydrophobic structure, 148–150 which enhances the water and gas permeability. More recently, mixed hydrophilic and hydrophobic structures have been proposed.…”

Section: Potential Applicationsmentioning

confidence: 99%

Exploring anomalous nanofluidic transport at the interfaces

Zhang,

Song,

Zeng

et al. 2024

Droplet

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Transport of ions and water is essential for diverse physiological activities and industrial applications. As the dimension approaches nano and even angstrom scale, ions and water exhibit anomalous behaviors that differ significantly from the bulk. One of the key reasons for these distinctive behaviors is the prominent influence of surface effects and related transport properties occurring at the interface under such (sub)nanoconfinement. Therefore, exploring nanofluidic transport at the interfaces could not only contribute to unraveling the intriguing ion and water transport behaviors but also facilitate the development of nanofluidic devices with tunable mass transport for practical applications. In this review, we focus on three crucial interfaces governing ion and water transport, namely liquid–gas interface, liquid–solid interface, and liquid–liquid interface, with emphasis on elucidating their intricate interfacial structures and critical roles for nanofluidic transport phenomena. Additionally, potential applications associated with liquid–gas, liquid–solid, and liquid–liquid interfaces are also discussed. Finally, we present a perspective on the pivotal roles of interfaces on nanofluidics, as well as challenges in this advancing field.

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Section: Potential Applicationsmentioning

confidence: 99%

Exploring anomalous nanofluidic transport at the interfaces

Zhang,

Song,

Zeng

et al. 2024

Droplet

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“…In our previous work, we found that superhydrophobicity of MPL can be achieved via a chemical modification. 33,34 In this study, dodecyltrimethoxysilane (DTMS), a compound with longchain molecular structure and low surface energy, is employed as a hydrophobic agent. 35,36 After the hydrolysis of silane, dehydration and condensation reactions occur, forming longchain groups.…”

Section: ■ Introductionmentioning

confidence: 99%

“…To address these issues, we proposed a facile synthetic strategy to prepare gradient hydrophobic MPLs. In our previous work, we found that superhydrophobicity of MPL can be achieved via a chemical modification. , In this study, dodecyltrimethoxysilane (DTMS), a compound with long-chain molecular structure and low surface energy, is employed as a hydrophobic agent. , After the hydrolysis of silane, dehydration and condensation reactions occur, forming long-chain groups. The hydroxyl groups on the long chain undergo a covalent cross-linking reaction with the hydroxyl groups on the surface of conductive carbon black, grafting hydrophobic groups onto the surface of carbon black.…”

Section: Introductionmentioning

confidence: 99%

Gradient Hydrophobic Microporous Layer for High-Performance Proton-Exchange Membrane Fuel Cells

Wang,

Guo,

et al. 2024

Energy Fuels

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The hydrophobicity of microporous layers (MPLs) plays an important role in water management and performance enhancement of proton-exchange membrane fuel cells (PEMFCs). In this study, we demonstrate a facile synthetic strategy for preparing a gradient hydrophobic MPL. The superhydrophobicity of the MPL is achieved by chemically grafting carbon black with dodecyltrimethoxysilane (DTMS). The MPL with gradient hydrophobicity is constructed with hydrophobic DTMS-functionalized carbon black integrated with a fine proportion of hydrophilic carbon black, demonstrating advanced water drainage capability. As employed in a PEMFC, the as-fabricated gradient hydrophobic MPL shows a significantly improved performance compared to a single hydrophobic MPL. The PEMFC loaded with the optimum gradient hydrophobic MPL delivers maximum power densities of 860.7 and 733.5 mW cm −2 at relative humidities (RHs) of 30 and 60%, respectively. The results presented herein provide a new strategy for the construction of gradient hydrophobic MPLs for adaptable PEMFCs.

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“…The R Ω is smaller for s-Gr+CB-MPLbased fuel cells compared with CB-MPL, which supports the result in Figure 2e that reducing surface resistance indeed improves the power density, in line with previous reports. 48,54,55 The transport resistance has a decreasing tendency when the cathode dew point increases; the R mt of the fuel cell containing s-Gr+CB-MPL has a significant decrease compared with that of CB-MPL. Especially for the 80 °C cathode dew point, the R mt has an 83% decrease, which shows improved water management and gas transport.…”

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confidence: 99%

Slip-Enhanced Transport by Graphene in the Microporous Layer for High Power Density Proton-Exchange Membrane Fuel Cells

Liu,

Wu,

Zeng

et al. 2023

J. Phys. Chem. Lett.

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Silane-functionalized carbon with super-hydrophobicity advancing microporous layer for proton exchange membrane fuel cells

Cited by 10 publications

References 44 publications

Exploring anomalous nanofluidic transport at the interfaces

Exploring anomalous nanofluidic transport at the interfaces

Gradient Hydrophobic Microporous Layer for High-Performance Proton-Exchange Membrane Fuel Cells

Slip-Enhanced Transport by Graphene in the Microporous Layer for High Power Density Proton-Exchange Membrane Fuel Cells

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