Improvement of the proton exchange membrane fuel cell performances by optimization of the hot pressing process for membrane electrode assembly

Martemianov, S.; Ilie, V.A. Raileanu; Coutanceau, Christophe

doi:10.1007/s10008-013-2273-2

Cited by 20 publications

(14 citation statements)

References 35 publications

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“…A wide range of process conditions are reported in the literature with hot press compression pressure ranging from 1380 kPa to 49,000 kPa, temperature from 90 o C to 170 o C, and time of compression from 90 s to 360 s [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][35][36][37][38][39][40][41]. Depending on the materials used, a large number of internal parameters affect the hot-pressing process, which explains why such a wide range of conditions are reported.…”

Section: Membrane Electrode Assemblymentioning

confidence: 99%

“…Hot pressing temperature has a critical effect on the electrolyte membrane as it undergoes macro-structural changes before and after its glass transition (typ. Nafion ionomer 117-127 o C) [8,36,47,48] which affects its ability to flow and bond. The ionomer content within the catalyst layer will also affect the quality of the bonding process between the catalyst and the electrolyte membrane, as the Nafion ionomer with the catalyst will bond with the Nafion membrane [39,[49][50][51].…”

Section: Internal Parameters Affecting Hot-pressingmentioning

confidence: 99%

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Investigation of Hot Pressed Polymer Electrolyte Fuel Cell Assemblies via X-ray Computed Tomography

Meyer¹,

Mansor²,

Iacoviello³

et al. 2017

Electrochimica Acta

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The hot pressing process for fabricating membrane electrode assemblies (MEAs) has been widely adopted, yet little is known of its effects on the microstructural properties of the different components of the MEA. In particular, the interaction of the electrolyte, electrode and gas diffusion layer (GDL) due to lamination is difficult to probe as conventional imaging techniques cannot access the internal structure of the MEA. Here, a novel approach is used, which combines characterisation of hot-pressed membrane electrode assemblies using X-ray computed tomography, thermogravimetric analysis, differential scanning calorimetry and atomic force microscopy, with electrochemical performance measurements from polarisation curves and high-frequency impedance spectroscopy. Membrane electrode assemblies hot pressed at 100 o C, 130 o C and 170 o C reveal significant differences in microstructure, which has a consequence for the performance. When hot pressed at 100 o C, which is lower than the glass transition temperature of Nafion (123 o C), the catalyst only partially bonds with the Nafion membrane, leading to increased Ohmic resistance. At 170 o C, the Nafion membrane intrudes into the electrode, forming pinholes, degrading the catalyst layer and filling pores in the GDL. Finally, at 130 o C, the interfacial contact is optimum, with similar roughness factor between the catalyst and Nafion membrane surface, indicating effective lamination of layers.

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Section: Membrane Electrode Assemblymentioning

confidence: 99%

Section: Internal Parameters Affecting Hot-pressingmentioning

confidence: 99%

Investigation of Hot Pressed Polymer Electrolyte Fuel Cell Assemblies via X-ray Computed Tomography

Meyer¹,

Mansor²,

Iacoviello³

et al. 2017

Electrochimica Acta

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“…Thus, a significant decrease in the ECSAs of the membranes before and after the ALT was observed, with the casting membrane going from an initial value of 20.1 m 2 /g to 10.9 m 2 /g and the functionalized SiC web membrane going from an initial value of 20.4 m 2 /g to 12.4 m 2 /g, respectively. It is expected that the changes in the electrode micro-structure are due to the hydrophobic domain of the ionomer coming into contact with the catalyst surface rather than the hydrophilic groups, which reduces the triple boundary at the high temperature and low hydration of the ionomer [40].…”

Section: Resultsmentioning

confidence: 99%

Silicon carbide fiber-reinforced composite membrane for high-temperature and low-humidity polymer exchange membrane fuel cells

Kim

Juon

Park

et al. 2014

International Journal of Hydrogen Energy

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“…Environmentally friendly fuel cells are potential candidates for this purpose. Proton exchange membrane fuel cell (PEMFC) technology has the potential to be a renewable energy source of an impending hydrogen economy owing to its high efficiency, high energy density, quiet operation, and environmental friendliness [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

SPEES/PEI-based highly selective polymer electrolyte membranes for DMFC application

Neelakandan

Kanagaraj

Sabarathinam

et al. 2015

J Solid State Electrochem

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Polymer composite membranes based on sulfonated poly(phenylene ether ether sulfone) (SPEES) membrane with varying concentrations of poly(ether imide) (PEI) were prepared. The sulfonation of PEES was carried out with concentrated sulfuric acid at 10°C, and the sulfonation degree was maintained as 70 %. The introduction of PEI into the hydrophilic SPEES matrix provided good chemical stability to the membrane. The water uptake, ion exchange capacity, and proton conductivity decrease with increasing PEI content. Scanning electron microscopy (SEM) indicates that PEI particles are homogeneously dispersed into the composite membrane. Thermogravimetric analysis (TGA) showed that all the composite membranes exhibited good thermal stability. On the other hand, the methanol permeability of the composite membranes gradually decreases from 4.23 × 10 −7 cm 2 s −1 to 8.84 × 10 −8 cm 2 s −1 , which is lower than that of the Nafion 117 membrane. The relative selectivity of the PEI-incorporated SPEES membranes was higher than that of the Nafion membranes. From the observed results, the prepared SPEES/ PEI-15 composite membrane can be considered as apposite polymer electrolyte membranes for the application of direct methanol fuel cells (DMFCs).

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Improvement of the proton exchange membrane fuel cell performances by optimization of the hot pressing process for membrane electrode assembly

Cited by 20 publications

References 35 publications

Investigation of Hot Pressed Polymer Electrolyte Fuel Cell Assemblies via X-ray Computed Tomography

Investigation of Hot Pressed Polymer Electrolyte Fuel Cell Assemblies via X-ray Computed Tomography

Silicon carbide fiber-reinforced composite membrane for high-temperature and low-humidity polymer exchange membrane fuel cells

SPEES/PEI-based highly selective polymer electrolyte membranes for DMFC application

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