Impact of ion exchange membrane surface charge and hydrophobicity on electroconvection at underlimiting and overlimiting currents

2017 ◽  
Vol 523 ◽  
pp. 36-44 ◽  
Author(s):  
K.A. Nebavskaya ◽  
V.V. Sarapulova ◽  
K.G. Sabbatovskiy ◽  
V.D. Sobolev ◽  
N.D. Pismenskaya ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Surface Charge ◽  
Membrane Surface ◽  
Ion Exchange Membrane ◽  
Exchange Membrane ◽  
Membrane Surface Charge

In situ investigation of electrical inhomogeneity of ion exchange membrane surface using scanning electrochemical microscopy

2016 ◽  
Vol 56 (11) ◽  
pp. 1006-1013 ◽  
Author(s):  
D. Yu. Butylskii ◽  
S. A. Mareev ◽  
V. V. Nikonenko ◽  
N. D. Pismenskaya ◽  
C. Larchet ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Membrane Surface ◽  
Scanning Electrochemical Microscopy ◽  
Ion Exchange Membrane ◽  
In Situ Investigation ◽  
Exchange Membrane ◽  
Electrochemical Microscopy

scholarly journals Modification of Ion-exchange Membrane Surface by Plasma Processes V. Surface Modification of Nafion by 3- (2-aminoethyl) aminopropyltrimethoxysilane

1992 ◽  
Vol 60 (6) ◽  
pp. 462-466 ◽  
Author(s):  
Zempachi OGUMI ◽  
Yoshiharu UCHIMOTO ◽  
Kazuaki YASUDA ◽  
Tutomu YOSHIDA ◽  
Zen-ichiro TAKEHARA
Keyword(s):  
Surface Modification ◽  
Ion Exchange ◽  
Membrane Surface ◽  
Ion Exchange Membrane ◽  
Exchange Membrane

Highly proton conductive membranes based on carboxylated cellulose nanofibres and their performance in proton exchange membrane fuel cells

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Annika Carlson ◽  
Shun Yu ◽  
Göran Lindbergh ◽  
Rakel Wreland Lindström ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Surface Charge ◽  
Proton Exchange Membrane ◽  
Membrane Surface ◽  
Proton Exchange ◽  
Membrane Thickness ◽  
Fuel Cell Performance ◽  
Cellulose Nanofibres ◽  
Exchange Membrane

The performance of thin carboxylated cellulose nanofiber-based (CNF) membranes as proton exchange membranes in fuel cells has been measured in-situ as a function of CNF surface charge density (600 and 1550 µmol g<sup>-1</sup>), counterion (H<sup>+</sup>or Na<sup>+</sup>), membrane thickness and fuel cell relative humidity (RH 55 to 95 %). The structural evolution of the membranes as a function of RH as measured by Small Angle X-ray scattering shows that water channels are formed only above 75 % RH. The amount of absorbed water was shown to depend on the membrane surface charge and counter ions (Na<sup>+</sup>or H<sup>+</sup>). The high affinity of CNF for water and the high aspect ratio of the nanofibers, together with a well-defined and homogenous membrane structure, ensures a proton conductivity exceeding 1 mS cm<sup>-1</sup>at 30 °C between 65 and 95 % RH. This is two orders of magnitude larger than previously reported values for cellulose materials and only one order of magnitude lower than Nafion 212. Moreover, the CNF membranes are characterized by a lower hydrogen crossover than Nafion, despite being ≈ 30 % thinner. Thanks to their environmental compatibility and promising fuel cell performance the CNF membranes should be considered for new generation proton exchange membrane fuel cells.<br>

The role of ion exchange membrane in vanadium oxygen fuel cell

2021 ◽  
Vol 629 ◽  
pp. 119271
Author(s):  
Jiří Charvát ◽  
Petr Mazúr ◽  
Martin Paidar ◽  
Jaromír Pocedič ◽  
Jiří Vrána ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Ion Exchange ◽  
Ion Exchange Membrane ◽  
Exchange Membrane ◽  
Oxygen Fuel
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