Water channel structure of alternative perfluorosulfonic acid membranes for fuel cells

2021 ◽  
pp. 119559
Author(s):  
Santiago P. Fernandez Bordín ◽  
Heber E. Andrada ◽  
Alejo C. Carreras ◽  
Gustavo Castellano ◽  
Ralf Schweins ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Water Channel ◽  
Channel Structure ◽  
Perfluorosulfonic Acid ◽  
Perfluorosulfonic Acid Membranes

Polymer Electrolyte Membrane Technology for Fuel Cells

MRS Bulletin ◽  
2005 ◽  
Vol 30 (8) ◽  
pp. 587-590 ◽  
Author(s):  
Raj G. Rajendran
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Pem Fuel Cell ◽  
Perfluorosulfonic Acid ◽  
Cell Systems ◽  
Cell Technology ◽  
Electrolyte Membrane ◽  
Perfluorosulfonic Acid Membranes

AbstractThe concept of using an ion-exchange membrane as an electrolyte separator for polymer electrolyte membrane (PEM) fuel cells was first reported by General Electric in 1955. However, a real breakthrough in PEM fuel cell technology occurred in the mid-1960s after DuPont introduced Nafion®, a perfluorosulfonic acid membrane. Due to their inherent chemical, thermal, and oxidative stability, perfluorosulfonic acid membranes displaced unstable polystyrene sulfonic acid membranes.Today, Nafion® and other related perfluorosulfonic acid membranes are considered to be the state of the art for PEM fuel cell technology. Although perfluorosulfonic acid membrane structures are preferred today, structural improvements are still needed to accommodate the increasing demands of fuel cell systems for specific applications. Higher performance, lower cost, greater durability, better water management, the ability to perform at higher temperatures, and flexibility in operating with a wide range of fuels are some of the challenges that need to be overcome before widespread commercial adoption of the technology can be realized. The present article will highlight the membrane properties relevant to PEM fuel cell systems, the development history of perfluorosulfonic acid membranes, and the current status of R&D activities in PEM technology.

scholarly journals Effects of conjoint mechanical and chemical stress on perfluorosulfonic-acid membranes for fuel cells

2020 ◽  
Vol 476 ◽  
pp. 228662 ◽  
Author(s):  
Mylène Robert ◽  
Assma El Kaddouri ◽  
Jean-Christophe Perrin ◽  
Kévin Mozet ◽  
Meriem Daoudi ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Chemical Stress ◽  
Perfluorosulfonic Acid ◽  
Perfluorosulfonic Acid Membranes

Degradation effect on proton dissociation and transfer in perfluorosulfonic acid membranes

2021 ◽  
Author(s):  
Yu Hu ◽  
Shuai Wang ◽  
Guohui Gao ◽  
Yurong He
Keyword(s):  
Fuel Cells ◽  
Free Radicals ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Perfluorosulfonic Acid ◽  
Membrane Degradation ◽  
Proton Dissociation ◽  
Perfluorosulfonic Acid Membranes ◽  
Exchange Membrane ◽  
Degradation Effect

In the operation of proton exchange membrane fuel cells (PEMFCs), the ionomer- perfluorosulfonic acid (PSFA) membrane side chains are easily attacked by free radicals, resulting in the membrane degradation. In...

A chemical-mechanical ex-situ aging of perfluorosulfonic-acid membranes for fuel cells: Impact on the structure and the functional properties

2022 ◽  
Vol 520 ◽  
pp. 230911
Author(s):  
Mylène Robert ◽  
Assma El Kaddouri ◽  
Marie Crouillere ◽  
Jean-Christophe Perrin ◽  
Laetitia Dubau ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Functional Properties ◽  
Ex Situ ◽  
Perfluorosulfonic Acid ◽  
Perfluorosulfonic Acid Membranes

An in situ cross-linked vinylphosphonic acid-modified aminosilicon oxide gel electrolyte for proton exchange membrane fuel cells

2020 ◽  
Vol 4 (6) ◽  
pp. 2859-2868 ◽  
Author(s):  
Henghui Huang ◽  
Liwen Ni ◽  
Jiaoyan Xu ◽  
Xiaojun Xie ◽  
Li Zhang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Gel Electrolyte ◽  
Perfluorosulfonic Acid ◽  
Perfluorosulfonic Acid Membranes ◽  
Vinylphosphonic Acid ◽  
Exchange Membrane

Highly conductive and water-retentive vinylphosphonic acid-modified aminosilicon oxide cross-linked polymer/perfluorosulfonic acid membranes were prepared.

Polymer Electrolyte Actuator Driven by Low Voltage

1999 ◽  
Vol 600 ◽  
Author(s):  
K. Oguro ◽  
K. Asaka ◽  
N. Fujiwara ◽  
K. Onishi ◽  
S. Sewa
Keyword(s):  
Polymer Electrolyte ◽  
Low Voltage ◽  
Polymer Electrolyte Membrane ◽  
Water Channel ◽  
Artificial Muscle ◽  
Ion Exchange Resin ◽  
Channel Structure ◽  
Narrow Channels ◽  
Electrolyte Membrane ◽  
Counter Ion

AbstractComposites of perfluorinated polymer electrolyte membrane and gold electrodes bend in response to low-voltage electric stimuli and work as soft actuators like muscles. The composites were prepared by chemical plating. Charge on the electrode induces electric double layer and electro-osmotic drag of water by cation from anode to cathode through narrow channels in the perfluorinated ion-exchange resin. The electro-osmotic flow of water swells the polymer near the cathode rather than anode, and the membrane bends to the anode. The actuator comprises polymer electrolyte, electrodes, counter ion, solvent, lead wires, etc. Each component affects the performance of the actuator. Surface area of electrode and species of counter ion have drastic effect on voltage-displacement response. The response may depend on water channel structure of the polymer electrolyte. Modification of these factors improved the performance and resulted in the deflection over 360 degrees at a film actuator of 10 mm length. A tubular actuator was demonstrated as a multidirectional actuator. These actuators are applicable to artificial muscle, micro robots, or micro medical equipment inside body.

Water transport across mammalian cell membranes

1996 ◽  
Vol 270 (1) ◽  
pp. C12-C30 ◽  
Author(s):  
A. S. Verkman ◽  
A. N. van Hoek ◽  
T. Ma ◽  
A. Frigeri ◽  
W. R. Skach ◽  
...  
Keyword(s):  
Water Transport ◽  
Cell Membranes ◽  
Water Channel ◽  
Water Channels ◽  
Channel Structure ◽  
Level Information ◽  
Selective Channel ◽  
Transcriptional Units ◽  
Measurement Strategies

This review summarizes recent progress in water-transporting mechanisms across cell membranes. Modern biophysical concepts of water transport and new measurement strategies are evaluated. A family of water-transporting proteins (water channels, aquaporins) has been identified, consisting of small hydrophobic proteins expressed widely in epithelial and nonepithelial tissues. The functional properties, genetics, and cellular distributions of these proteins are summarized. The majority of molecular-level information about water-transporting mechanisms comes from studies on CHIP28, a 28-kDa glycoprotein that forms tetramers in membranes; each monomer contains six putative helical domains surrounding a central aqueous pathway and functions independently as a water-selective channel. Only mutations in the vasopressin-sensitive water channel have been shown to cause human disease (non-X-linked congenital nephrogenic diabetes insipidus); the physiological significance of other water channels remains unproven. One mercurial-insensitive water channel has been identified, which has the unique feature of multiple overlapping transcriptional units. Systems for expression of water channel proteins are described, including Xenopus oocytes, mammalian and insect cells, and bacteria. Further work should be directed at elucidation of the role of water channels in normal physiology and disease, molecular analysis of regulatory mechanisms, and water channel structure determination at atomic resolution.

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