Cross-linked Poly(arylene ether ketone) Proton Exchange Membranes with High Ion Exchange Capacity for Fuel Cells

Fuel Cells ◽  
2012 ◽  
Vol 12 (4) ◽  
pp. 589-598 ◽  
Author(s):  
S. Zhou ◽  
S. D. Hai ◽  
D. Kim
Keyword(s):  
Fuel Cells ◽  
Ion Exchange ◽  
Proton Exchange Membranes ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Ion Exchange Capacity ◽  
Arylene Ether ◽  
Ether Ketone

Characterization of Multiblock Sulfonated Poly(Arylene Ether Sulfone) as Proton Exchange Membranes

2013 ◽  
Vol 805-806 ◽  
pp. 1321-1324
Author(s):  
Hai Dan Lin ◽  
Xiao Ying Yang ◽  
Cheng Xun Sun
Keyword(s):  
Ion Exchange ◽  
Water Uptake ◽  
Proton Exchange Membranes ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Membrane Properties ◽  
Multiblock Copolymers ◽  
Arylene Ether ◽  
Ether Ketone ◽  
Sulfonated Poly

A new series of hydrophobic-hydrophilic multiblock sulfonated poly (arylene ether ketone)-b-poly (arylene ether ketone) copolymers were successfully synthesized and evaluated for use as proton exchange membranes (PEMs). The membrane properties of block copolymers including ion exchange capacities (IECs), water uptake and proton conductivities were characterized for the multiblock copolymers and compared with random sulfonated poly (arylene ether) s and other multiblock copolymer membranes at similar ion exchange capacity value. This series of multiblock copolymers showed moderate conductivities up to 0.063 S/cm at 80 °C with very low water uptake of 19%. Therefore, they are considered to be promising PEM materials for fuel cells.

Sulfonated poly(arylene thioether ketone ketone sulfone)s for proton exchange membranes with high oxidative stability

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Liping Shen ◽  
Guyu Xiao ◽  
Guoming Sun
Keyword(s):  
Oxidation Resistance ◽  
Proton Exchange Membranes ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Ion Exchange Capacity ◽  
Excellent Thermal Stability ◽  
Arylene Ether ◽  
Ether Ketone ◽  
High Oxidation Resistance ◽  
Sulfonated Poly

Abstract Sulfonated poly(arylene thioether ketone ketone sulfone)s (SPATKKS) were synthesized by nucleophilic polycondensation of various amounts of 1,3- bis(4-fluorobenzoyl)benzene, 1,3-bis(3-sodium sulfonate-4-fluorobenzoyl)benzene, and 4,4’-dichlorodiphenylsulfone with 4,4’-thiobisbenzenethiol. Sulfonated poly- (arylene ether ketone ketone sulfone)s were also prepared in order to compare their oxidation resistance to peroxides with that of SPATKKS. SPATKKS show high oxidation resistance to peroxides. The resulting ionomers with moderate ion exchange capacity present excellent thermal stability (the 5% weight loss temperature is about 500°C) and low water uptake and swelling ratio until 85°C. The materials hold promise for application as proton exchange membranes in fuel cells.

Synthesis and Properties of Fluorenyl-Containing Multiblock Sulfonated Poly(Arylene Ether Sulfone) Membranes for Fuel Cell Applications

2011 ◽  
Vol 391-392 ◽  
pp. 308-312
Author(s):  
Shan Shan Chen ◽  
Jian Mei Liu ◽  
Ying Ling ◽  
Shi Chao Fang ◽  
Hui Yang ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Proton Exchange Membranes ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Water Stability ◽  
Multiblock Copolymers ◽  
Dmso Solution ◽  
Ion Exchange Capacity ◽  
Arylene Ether ◽  
Sulfonated Poly

A series of novel multiblock copolymers containing rigid hydrophilic/soft hydrophobic blocks were synthesized and evaluated for use as proton exchange membranes (PEMs). The multiblock copolymers were prepared by a coupling reaction between phenoxide-terminated sulfonated poly(arylene ether sulfone) oligomer (OSO) and fluorine-terminated poly(arylene ether sulfone) oligomer (FNO). All copolymers produced tough, flexible and transparent membranes by casting from DMSO solution. The resulting membranes displayed good water stability and enhanced proton conductivities comparable to that of the corresponding random ones with similar ion exchange capacity (IEC) values. They also showed slight anisotropic swelling behavior, while isotropic behavior for the random ones. The results revealed that these multiblock copolymers were potential candidates for PEM materials.

Synthesis and Characterization of Multi-Sulfonated Poly(Aryl Ether Ketone)s Proton Exchange Membranes

2007 ◽  
Vol 544-545 ◽  
pp. 1065-1068 ◽  
Author(s):  
Dong Hoon Lee ◽  
Hye Suk Park ◽  
Dong Wan Seo ◽  
Tae Whan Hong ◽  
Whan Gi Kim
Keyword(s):  
Ion Exchange ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Condensation Polymerization ◽  
Aryl Ether ◽  
Scanning Calorimetry ◽  
Ion Exchange Capacity ◽  
Aryl Ether Ketone ◽  
Ether Ketone ◽  
Sulfonated Poly

A series of sulfonated poly(aryl ether ketone)s were prepared by condensation polymerization with bisphenol A and 1,2-bis(4-fluorobenzoyl)-3,6-diphenylbenzene, and followed by sufonation with chlorosulfonic acid. The polymers were characterized by Fourier transform infra-red (FTIR) and ion exchange capacity (IEC) to verify sulfonation. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were carried out to investigate the thermal stability of the prepared membranes. The membranes were found to possess all the requisite properties; Ion exchange capacity (3.31meq./g), glass transition temperatures (207-230°C), and low affinity towards methanol (2.04x10-6-4.15x10-7 cm2/S).

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.

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