Evolution of gas diffusion layer structures for aligned Pt nanowire electrodes in PEMFC applications

Steinberger‐Wilckens, Robert; Du, Shangfeng

doi:10.1016/j.electacta.2018.05.008

Cited by 19 publications

(5 citation statements)

References 36 publications

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“…The highly distributed Fe–N x active sites were successfully introduced into highly graphitized and branched CNT, which provided a way to develop non-precious metal ORR electrocatalysts with durable activity. Some of the recent examples of the performance studies of catalysts with hierarchical porous structures in PEMFCs are summarized in Table . ,,− ,,− ,,,,− …”

Section: Pgm-free Catalyst Structure Design In Pemfcsmentioning

confidence: 99%

Nanostructure Engineering of Cathode Layers in Proton Exchange Membrane Fuel Cells: From Catalysts to Membrane Electrode Assembly

Yang,

Xiang

2024

ACS Nano

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The membrane electrode assembly (MEA) is the core component of proton exchange membrane fuel cells (PEMFCs), which is the place where the reaction occurrence, the multiphase material transfer and the energy conversion, and the development of MEA with high activity and long stability are crucial for the practical application of PEMFCs. Currently, efforts are devoted to developing the regulation of MEA nanostructure engineering, which is believed to have advantages in improving catalyst utilization, maximizing three-phase boundaries, enhancing mass transport, and improving operational stability. This work reviews recent research progress on platinum group metal (PGM) and PGM-free catalysts with multidimensional nanostructures, catalyst layers (CLs), and nano-MEAs for PEMFCs, emphasizing the importance of structure−function relationships, aiming to guide the further development of the performance for PEMFCs. Then the design strategy of the MEA interface is summarized systematically. In addition, the application of in situ and operational characterization techniques to adequately identify current density distributions, hot spots, and water management visualization of MEAs is also discussed. Finally, the limitations of nanostructured MEA research are discussed and future promising research directions are proposed. This paper aims to provide valuable insights into the fundamental science and technical engineering of efficient MEA interfaces for PEMFCs.

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Section: Pgm-free Catalyst Structure Design In Pemfcsmentioning

confidence: 99%

Nanostructure Engineering of Cathode Layers in Proton Exchange Membrane Fuel Cells: From Catalysts to Membrane Electrode Assembly

Yang,

Xiang

2024

ACS Nano

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“…As the electrode with a monolayer array of Pt nanowires within the catalyst layer, a uniform distribution of the nanowires is key to achieve PEMFCs with high power performance. This is determined not only by the Pt nanowire loading [75] and the GDL surface structure [76], but also the surface wetability in the nanowire growth. To make the surface wettable to the aqueous reaction solution in the formic acid reducing process, a few techniques were deployed to increase the surface activity, including building composite microporous layer (MPL) from various carbon black to control the surface active sites [76], optimizing reaction temperature to improve the wettability in reaction [77], introducing Pd nanoseeds to inducing the distribution of Pt nanowires [78], and modify the GDL surface by active screen plasma nitriding (ASPN) [79,80].…”

Section: Electrodes From Aligned Single Crystal Pt Nanowiresmentioning

confidence: 99%

Nanoporous materials for proton exchange membrane fuel cell applications

Sui

Zhang

2020

Nanoporous Materials for Molecule Separation and Conversion

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“…Typically, the GDL consists of a macroporous carbon paper and a microporous layer (MPL) . The carbon paper provides mechanical support (supporting layer, SL), while the MPL has several key functions including the removal of water from the cell, the transfer of the fuel needed by the cell, and the reduction of the contact resistance between the GDL and the CL. , The MPL is usually composed of carbon black and a hydrophobic agent poly(tetrafluoroethylene) (PTFE) . Carbon black has a particle size (tens of nanometers) well below that of the SL pore size (several μm).…”

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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Evolution of gas diffusion layer structures for aligned Pt nanowire electrodes in PEMFC applications

Cited by 19 publications

References 36 publications

Nanostructure Engineering of Cathode Layers in Proton Exchange Membrane Fuel Cells: From Catalysts to Membrane Electrode Assembly

Nanostructure Engineering of Cathode Layers in Proton Exchange Membrane Fuel Cells: From Catalysts to Membrane Electrode Assembly

Nanoporous materials for proton exchange membrane fuel cell applications

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

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