New Approach for the Evaluation of Membranes Transport Properties for Polymer Electrolyte Membrane Fuel Cells
The two major hurdles obstructing the large scale commercialization of PEMFCs (polymer electrolyte membrane fuel cells) are the cost and…
High Performance Sulfonated Aromatic Ionomers by Solvothermal Macromolecular Synthesis
Thermal cross-linking in presence of residual solvent dimethylsulfoxide without any addition of cross-linker molecules is described. This elegant method increases…
Conductivity and Hydration of Sulfonated Polyethersulfone in the Range 70-120 Degrees C: Effect of Temperature and Relative Humidity Cycling
Proton conductivity and hydration of sulfonated polyethersulfone (SPES) membranes, with ion exchange capacity of 1.31 meq g−1, is determined under different conditions…
Building Bridges: Crosslinking of Sulfonated Aromatic Polymers-a Review
Sulfonated aromatic polymers (SAP) are promising inexpensive polymer electrolyte membranes for fuel cells, but there still exist some challenges about…
Crosslinked Speek Membranes: Mechanical, Thermal, and Hydrothermal Properties
The thermal and mechanical behavior, the water uptake (WU), and water diffusion coefficient of sulfonated poly(ether ether ketone) (SPEEK) membranes…
Sulfonated Polyphenyl Ether by Electropolymerization
Electropolymerization of sulfonated phenol was for the first time achieved and studied by cyclic voltammetry (CV) and chronoamperometry on stainless…
Sulfonated Aromatic Ionomers: Analysis of Proton Conductivity and Proton Mobility
Recent progress on proton-conducting Sulfonated Aromatic Polymers is reviewed, including composite and cross-linked ionomers. Proton conductivity and water uptake, studied…
Water Adsorption/Desorption in Proton-Conducting Ionomer Membranes: The Model Case of Sulfonated and Silylated Poly-Ether-Ether-Ketone
The paper describes the processes of water adsorption and desorption in a model hydrated acidic polymer, sulfonated and silylated poly-ether-ether-ketone…
More on Nafion Conductivity Decay at Temperatures Higher Than 80 Degrees C: Preparation and First Characterization of in-Plane Oriented Layered Morphologies
In order to have a better understanding of nafion behaviour in fuel cells operating at temperatures higher than 80 oC,…
Annealing of Nafion 1100 in the Presence of an Annealing Agent: A powerful Method for Increasing Ionomer Working Temperature in PEMFCs
The possibility of increasing the working temperature of fuel cells using Nafion as ionomer membranes by a new annealing procedure…
Sulfonated Aromatic Polymers as Proton-Conducting Solid Electrolytes for Fuel Cells: A Short Review
This review describes main strategies for the development of sulfonated aromatic polymers (SAP) with optimal properties for medium temperature (90–120…
Cross-Linked Sulfonated Aromatic Ionomers Via SO2 Bridges: Conductivity Properties
The proton conductivity of SPEEK membranes in situ cross-linked by thermal treatment at 180 °C for various times was investigated by impedance spectroscopy. The conductivity measurements…