Nafion membranes with a porous surface

Dang, Quoc Khanh; Henkensmeier, Dirk; Krishnan, N. Nambi; Jang, Jong Hyun; Kim, Hyoung Juhn; Nam, Suk Woo; Lim, Tae Hoon

doi:10.1016/j.memsci.2014.03.003

Cited by 24 publications

(12 citation statements)

References 26 publications

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“…Aquivion s from Solvay Specialty Polymers, which is synthesized from the same co-monomers as the Dow membrane and formerly known as Hyflon s Ion, was used as the base material in the present work after replacing the acidic proton with potassium. Previously in the literature, porous PFSA membranes have been prepared using various porogens including dibutyl phthalate [47], propylene carbonate [48], polyoxometalate [49] or dichlorobenzene [50]. In this work, poly(vinylpyrrolidone) (PVP) was chosen as porogen since it is highly soluble in water and easily washed out to generate voids in the structure.…”

Section: Membrane Preparation and Characterizationmentioning

confidence: 99%

Porous poly(perfluorosulfonic acid) membranes for alkaline water electrolysis

Aili

Hansen

Andreasen

et al. 2015

Journal of Membrane Science

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Section: Membrane Preparation and Characterizationmentioning

confidence: 99%

Porous poly(perfluorosulfonic acid) membranes for alkaline water electrolysis

Aili

Hansen

Andreasen

et al. 2015

Journal of Membrane Science

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“…The void structures are expected to improve the water balance ability by enhancing the back-diffusion of water to the anode side. 35,36 Although the surface area of the void space is not utilized to form the interface between the CL and the membrane, the void space is effective in facilitating mass transport and improving cell performance in the high-currentdensity region. 37 In addition, these results suggest an appropriate level of void volume to achieve efficient enhancements.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The high-frequency intercept and the diameter of the semicircle with the x-axis represent the ohmic resistance and charge transfer resistance, respectively. 42 In the ohmic resistance region, all of the patterned membranes exhibited a slightly smaller ohmic resistance in the range from 60 to 85 Ω cm 2 (Table 2), reflecting that the patterned membrane forms better interfacial contact with the CL and higher proton conductivity 35,41 owing to the higher surface roughness. 11,30,41 In addition, it is confirmed that the patterned membrane was negligibly damaged during plasma etching.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Customized Patterning of Deep Nanowell Structures in Polymer Electrolyte Membranes for Highly Enhanced Fuel Cell Performances

Jeon

Lee

Kim

et al. 2023

ACS Appl. Energy Mater.

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Surface microstructuring of polymer electrolyte membranes (PEMs) has been considered as an effective strategy to extend the three-phase boundary in PEM fuel cells (PEMFCs). However, it is still unclear which parameters are the most critical for maximizing cell performance. In this study, in order to elucidate the correlation between the membrane surface topography and PEMFC performances, we employed solvent-assisted nanotransfer printing and plasma deep etching techniques, which allow independent control of structural parameters. This approach enables the formation of various catalyst–membrane interface structures with controlled pattern periods and aspect ratios. Our systematic customization reveals that nanowell patterned membranes partially filled with carbon-supported platinum (Pt/C) can significantly improve fuel cell performance, which is driven by both reducing kinetic resistance and mass transport resistance. In particular, the sample with a pattern period of 1200 nm and a well depth of 1100 nm exhibited the best performance, a current density of 1000 mA/cm2 at a cell voltage of 0.6 V, and a maximum power density of 583 mW/cm2. These values are 53 and 41% higher than those with unpatterned membranes, respectively, at the same Pt loading.

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“…Reproduced with permission. [ 71 ] Copyright 2014, Elsevier. d) Construction of multifunctional Nafion/CeO 2 dendritic structures via electro‐spray deposition method using a mixed solution of Nafion and CeO 2 ; SEM images of Nafion/CeO 2 structures.…”

Section: Surface Modification Of Membranementioning

confidence: 99%

Multiscale Architectured Membranes, Electrodes, and Transport Layers for Next‐Generation Polymer Electrolyte Membrane Fuel Cells

et al. 2023

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Over the past few decades, considerable advances have been achieved in polymer electrolyte membrane fuel cells (PEMFCs) based on the development of material technology. Recently, an emerging multiscale architecturing technology covering nanometer, micrometer, and millimeter scales has been regarded as an alternative strategy to overcome the hindrance to achieving high‐performance and reliable PEMFCs. This review summarizes the recent progress in the key components of PEMFCs based on a novel architecture strategy. In the first section, diverse architectural methods for patterning the membrane surface with random, single‐scale, and multiscale structures as well as their efficacy for improving catalyst utilization, charge transport, and water management are discussed. In the subsequent section, the electrode structures designed with 1D and 3D multiscale structures to enable low Pt usage, improve oxygen transport, and achieve high electrode durability are elucidated. Finally, recent advances in the architectured transport layer for improving mass transportation including pore gradient, perforation, and patterned wettability for gas diffusion layer and 3D structured/engineered flow fields are described.

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Nafion membranes with a porous surface

Cited by 24 publications

References 26 publications

Porous poly(perfluorosulfonic acid) membranes for alkaline water electrolysis

Porous poly(perfluorosulfonic acid) membranes for alkaline water electrolysis

Customized Patterning of Deep Nanowell Structures in Polymer Electrolyte Membranes for Highly Enhanced Fuel Cell Performances

Multiscale Architectured Membranes, Electrodes, and Transport Layers for Next‐Generation Polymer Electrolyte Membrane Fuel Cells

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