Proton exchange composite membranes from blends of brominated and sulfonated poly(2,6-dimethyl-1,4-phenylene oxide)

2011 ◽  
Vol 124 (4) ◽  
pp. 3511-3519 ◽  
Author(s):  
Tongwen Xu ◽  
Dan Wu ◽  
Seok-Jun Seo ◽  
Jung-Je Woo ◽  
Liang Wu ◽  
...  
Keyword(s):  
Composite Membranes ◽  
Proton Exchange ◽  
Phenylene Oxide ◽  
Sulfonated Poly

On the Synthesis and Characterization of Silica-Doped/Sulfonated Poly-(2,6-Dimethyl-1,4-Phenylene Oxide) Composite Membranes for Fuel Cells

2014 ◽  
Vol 11 (4) ◽  
Author(s):  
Daniela Ebrasu ◽  
Irina Petreanu ◽  
Mihai Varlam ◽  
Dorin Schitea ◽  
Ioan Stefanescu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Conductivity ◽  
Water Uptake ◽  
Sol Gel ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Differential Scanning Calorimetric ◽  
Gravimetric Analysis ◽  
Phenylene Oxide ◽  
Sulfonated Poly

The objective of this investigation is to study silica-doped/sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) composite membranes for operation in hydrogen/oxygen proton-exchange membrane fuel cells ranging from room temperature (RT) up to 120 °C. The sulfonated PPO composite membranes were prepared using a sol–gel process employing reaction with tetra-ethoxysilane (TEOS) followed by heat treatment at 60, 90, and 120 °C, respectively. The presence of silicon oxide in the composite membranes was evaluated using FTIR spectroscopy, while thermal properties were studied using thermal gravimetric analysis-differential scanning calorimetric (TGA-DSC) measurements. Additionally, ion exchange capacity, water uptake, and proton conductivity characterizations were also carried out. It was observed that water uptake for 75% PPO sulfonated composite membrane treated at 120 °C is higher than that of NafionTM membrane and the proton conductivity value measured at 120  °C is 0.35·10−1 S/cm. Therefore, the composite membranes are potentially suitable for high temperature fuel cell applications.

Highly selective sulfonated Poly (arylene ether nitrile) composite membranes containing copper phthalocyanine grafted graphene oxide for direct methanol fuel cell

2021 ◽  
pp. 095400832110394
Author(s):  
Yan Ma ◽  
Kaixu Ren ◽  
Ziqiu Zeng ◽  
Mengna Feng ◽  
Yumin Huang
Keyword(s):  
Graphene Oxide ◽  
Proton Conductivity ◽  
Direct Methanol Fuel Cells ◽  
Copper Phthalocyanine ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Methanol Permeability ◽  
Arylene Ether ◽  
Direct Methanol ◽  
Sulfonated Poly

To improve the performances of sulfonated poly (arylene ether nitrile) (SPEN)–based proton exchange membranes (PEMs) in direct methanol fuel cells (DMFCs), the copper phthalocyanine grafted graphene oxide (CP-GO) was successfully prepared via in situ polymerization and subsequently incorporated into SPEN as filler to fabricate a series of SPEN/CP-GO-X (X represents for the mass ratio of CP-GO) composite membranes. The water absorption, swelling ratio, mechanical properties, proton conductivity, and methanol permeability of the membranes were systematically studied. CP-GO possesses good dispersion and compatibility with SPEN matrix, which is propitious to the formation of strong interfacial interactions with the SPEN, so as to provide more efficient transport channels for proton transfer in the composite membranes and significantly improve the proton conductivity of the membranes. Besides, the strong π–π conjugation interactions between CP-GO and SPEN matrix can make the composite membranes more compact, blocking the methanol transfer in the membranes, and significantly reducing the methanol permeability. Consequently, the SPEN/CP-GO-1 composite membrane displayed outstanding tensile strength (58 MPa at 100% RH and 25°C), excellent proton conductivity (0.178 S cm−1 at 60°C), and superior selectivity (5.552 × 105 S·cm−3·s). This study proposed a new method and strategy for the preparation of high performance PEMs.

Solution blown sulfonated poly(ether ether ketone) nanofiber–Nafion composite membranes for proton exchange membrane fuel cells

RSC Advances ◽  
2015 ◽  
Vol 5 (7) ◽  
pp. 4934-4940 ◽  
Author(s):  
Xianlin Xu ◽  
Li Li ◽  
Hang Wang ◽  
Xiaojie Li ◽  
Xupin Zhuang
Keyword(s):  
Fuel Cells ◽  
Composite Membrane ◽  
Proton Exchange Membrane ◽  
Composite Membranes ◽  
Proton Exchange ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Exchange Membrane ◽  
Sulfonated Poly

The incorporation of SPEEK nanofibers into a Nafion matrix enhanced the performance of the composite membrane as a proton exchange membrane.

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