scholarly journals Synthesis and investigation of sulfonated poly(p-phenylene)-based ionomers with precisely controlled ion exchange capacity for use as polymer electrolyte membranes

RSC Advances ◽  
2020 ◽  
Vol 10 (22) ◽  
pp. 12810-12822 ◽  
Author(s):  
Miru Yoshida-Hirahara ◽  
Satoshi Takahashi ◽  
Masahiro Yoshizawa-Fujita ◽  
Yuko Takeoka ◽  
Masahiro Rikukawa
Keyword(s):  
Ion Exchange ◽  
Polymer Electrolyte ◽  
Exchange Capacity ◽  
Polymer Electrolyte Membranes ◽  
Ion Exchange Capacity ◽  
Step Procedure ◽  
Electrolyte Membranes ◽  
Sulfonated Polymers ◽  
Sulfonated Poly

Poly(p-phenylene)-based sulfonated polymers with well-controlled IECs were synthesized via a three-step procedure including preceding sulfonation of precursor monomers.

scholarly journals Polymer Electrolyte Membranes Based on Nafion and a Superacidic Inorganic Additive for Fuel Cell Applications

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 914 ◽  
Author(s):  
Lucia Mazzapioda ◽  
Stefania Panero ◽  
Maria Assunta Navarra
Keyword(s):  
Fuel Cell ◽  
Ion Exchange ◽  
Proton Exchange Membrane ◽  
Sol Gel ◽  
Composite Membranes ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Thermal Transitions ◽  
Ion Exchange Capacity ◽  
Electrolyte Membranes

Nafion composite membranes, containing different amounts of mesoporous sulfated titanium oxide (TiO2-SO4) were prepared by solvent-casting and tested in proton exchange membrane fuel cells (PEMFCs), operating at very low humidification levels. The TiO2-SO4 additive was originally synthesized by a sol-gel method and characterized through x-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and ion exchange capacity (IEC). Peculiar properties of the composite membranes, such as the thermal transitions and ion exchange capacity, were investigated and here discussed. When used as an electrolyte in the fuel cell, the composite membrane guaranteed an improvement with respect to bare Nafion systems at 30% relative humidity and 110 °C, exhibiting higher power and current densities.

Sulfonated poly (styrene-co-ethylene glycol dimethacrylate) with attractive ion exchange capacity

2018 ◽  
Vol 29 (11) ◽  
pp. 2759-2765 ◽  
Author(s):  
Thiago R. Theodoro ◽  
Joslaine R. Dias ◽  
Júlia L. Penariol ◽  
Juliana O.V. Moura ◽  
Leandro G. Aguiar
Keyword(s):  
Ion Exchange ◽  
Ethylene Glycol ◽  
Exchange Capacity ◽  
Ethylene Glycol Dimethacrylate ◽  
Glycol Dimethacrylate ◽  
Ion Exchange Capacity ◽  
Sulfonated Poly
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