Fabrication of Catalyst Layers for Anion Exchange Membrane  Fuel Cells By Using Electrospray Deposition.

Yamanaka, Tatsuya; Katayama, Noboru; Kogoshi, Sumio

doi:10.1149/07101.0211ecst

“…The addition of surfactants to create additional porous structures allowing the modification of the layers after deposition has also been tested . There are some successful attempts to expand the use of electrospray deposition to other type of fuel cells by depositing specific catalyst inks, such as Pt/C with polybenzimidazole for high-temperature PEM, Pt/C with polyvinylpyrrolidone for an anion exchange membrane, Pt–Ru/C with Nafion for direct methanol, and palladium black with Nafion for direct formic acid fuel cells …”

Section: Latest Work and Innovative Approachesmentioning

confidence: 99%

Electrospray Deposition: A Breakthrough Technique for Proton Exchange Membrane Fuel Cell Catalyst Layer Fabrication

Conde

¹

,

Ferreira-Aparicio

²

,

Chaparro

³

2021

ACS Appl. Energy Mater.

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This Spotlight article presents the state-of-the-art of electrospray deposition technique applied to the fabrication of proton exchange membrane fuel cell (PEMFC) components, mainly focusing on catalyst layers in gas diffusion electrodes. The atomization of a suspension of particles over a substrate under the influence of a strong electric field results in the growth of a film with macroporous morphology and many interesting properties. This so-called electrospray deposition has reported many noteworthy beneficial effects for the fabrication of the catalyst layers of gas diffusion electrodes of PEMFCs. The electrosprayed catalyst layers prepared from suspensions of catalyst particles and ionomers present a dendritic macroporous morphology with superhydrophobic character that improves the water management inside the cell and increases the performance by ∼20% with respect to standard electrodes prepared by airbrushing. Other interesting effects observed with electrosprayed catalyst layers are increased catalyst utilization and water absorption capabilities of the ionomer, improved performance under nonhumidified conditions, and a reduction in catalyst degradation. In addition, the electrospray deposition decreases platinum losses during fabrication thanks to the attractive electrostatic forces between the ion mist and the substrate compared with regular ink-based spray methods.

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“…73 The addition of surfactants to create additional porous structures allowing the modification of the layers after deposition has also been tested. 74 There are some successful attempts to expand the use of electrospray deposition to other type of fuel cells by depositing specific catalyst inks, such as Pt/C with polybenzimidazole for high-temperature PEM, 75 Pt/C with polyvinylpyrrolidone for an anion exchange membrane, 76 Pt− Ru/C with Nafion for direct methanol, 63 and palladium black with Nafion for direct formic acid fuel cells. 77…”

Section: Latest Work and Innovative Approachesmentioning

confidence: 99%

Revising Concepts on Liquid–Liquid Extraction: Data Treatment and Data Reliability

Arce

¹

,

Rodrı́guez

²

2021

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This Spotlight article presents the state-of-the-art of electrospray deposition technique applied to the fabrication of proton exchange membrane fuel cell (PEMFC) components, mainly focusing on catalyst layers in gas diffusion electrodes. The atomization of a suspension of particles over a substrate under the influence of a strong electric field results in the growth of a film with macroporous morphology and many interesting properties. This so-called electrospray deposition has reported many noteworthy beneficial effects for the fabrication of the catalyst layers of gas diffusion electrodes of PEMFCs. The electrosprayed catalyst layers prepared from suspensions of catalyst particles and ionomers present a dendritic macroporous morphology with superhydrophobic character that improves the water management inside the cell and increases the performance by ∼20% with respect to standard electrodes prepared by airbrushing. Other interesting effects observed with electrosprayed catalyst layers are increased catalyst utilization and water absorption capabilities of the ionomer, improved performance under nonhumidified conditions, and a reduction in catalyst degradation. In addition, the electrospray deposition decreases platinum losses during fabrication thanks to the attractive electrostatic forces between the ion mist and the substrate compared with regular ink-based spray methods.

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