Bis-imidazolium based poly(phenylene oxide) anion exchange membranes for fuel cells: the effect of cross-linking

2019 ◽  
Vol 7 (21) ◽  
pp. 13275-13283 ◽  
Author(s):  
Bencai Lin ◽  
Fei Xu ◽  
Fuqiang Chu ◽  
Yurong Ren ◽  
Jianning Ding ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fuel Cells ◽  
Anion Exchange ◽  
Oxidation Stability ◽  
Cross Linking ◽  
Anion Exchange Membranes ◽  
Alkaline Stability ◽  
Phenylene Oxide

Cross-linked membranes showed vastly improved alkaline stability, oxidation stability and mechanical properties compared with uncross-linked membranes due to the effective cross-linked structure.

scholarly journals Anion-exchange membranes with polycationic alkyl side chains attached via spacer units

2016 ◽  
Vol 4 (43) ◽  
pp. 17138-17153 ◽  
Author(s):  
Hai-Son Dang ◽  
Patric Jannasch
Keyword(s):  
Anion Exchange ◽  
Ion Conductivity ◽  
Side Chains ◽  
Anion Exchange Membranes ◽  
Hydroxide Ion ◽  
Alkaline Stability ◽  
Phenylene Oxide ◽  
Alkyl Side Chains

Poly(phenylene oxide)s carrying pendant polycationic alkyl side chains with a suitable configuration show high hydroxide ion conductivity and excellent alkaline stability.

scholarly journals Alkaline stability of model anion exchange membranes based on poly(phenylene oxide) (PPO) with grafted quaternary ammonium groups: Influence of the functionalization route

Polymer ◽  
2019 ◽  
Vol 185 ◽  
pp. 121931 ◽  
Author(s):  
R.-A. Becerra-Arciniegas ◽  
R. Narducci ◽  
G. Ercolani ◽  
S. Antonaroli ◽  
E. Sgreccia ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Anion Exchange Membranes ◽  
Alkaline Stability ◽  
Phenylene Oxide

scholarly journals Pore-Filled Anion-Exchange Membranes with Double Cross-Linking Structure for Fuel Cells and Redox Flow Batteries

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4761
Author(s):  
Do-Hyeong Kim ◽  
Moon-Sung Kang
Keyword(s):  
Fuel Cells ◽  
Energy Conversion ◽  
Anion Exchange ◽  
Cross Linking ◽  
Anion Exchange Membranes ◽  
Porous Substrate ◽  
Redox Flow Batteries ◽  
Vanadium Redox ◽  
Double Cross ◽  
Electrochemical Energy

In this work, high-performance pore-filled anion-exchange membranes (PFAEMs) with double cross-linking structures have been successfully developed for application to promising electrochemical energy conversion systems, such as alkaline direct liquid fuel cells (ADLFCs) and vanadium redox flow batteries (VRFBs). Specifically, two kinds of porous polytetrafluoroethylene (PTFE) substrates, with different hydrophilicities, were utilized for the membrane fabrication. The PTFE-based PFAEMs revealed, both excellent electrochemical characteristics, and chemical stability in harsh environments. It was proven that the use of a hydrophilic porous substrate is more desirable for the efficient power generation of ADLFCs, mainly owing to the facilitated transport of hydroxyl ions through the membrane, showing an excellent maximum power density of around 400 mW cm−2 at 60 °C. In the case of VRFB, however, the battery cell employing the hydrophobic PTFE-based PFAEM exhibited the highest energy efficiency (87%, cf. AMX = 82%) among the tested membranes, because the crossover rate of vanadium redox species through the membrane most significantly affects the VRFB efficiency. The results imply that the properties of a porous substrate for preparing the membranes should match the operating environment, for successful applications to electrochemical energy conversion processes.

scholarly journals Preparation and Characterization of PVA/PDDA/Nano-Zirconia Composite Anion Exchange Membranes for Fuel Cells

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1399 ◽  
Author(s):  
Asep Muhamad Samsudin ◽  
Viktor Hacker
Keyword(s):  
Mechanical Properties ◽  
Fuel Cells ◽  
Anion Exchange ◽  
Testing Machine ◽  
Conductivity Measurement ◽  
Poly Vinyl Alcohol ◽  
Anion Exchange Membranes ◽  
Potential Candidate ◽  
Casting Technique ◽  
Chemical Structures

Anion exchange membranes (AEMs) contribute significantly to enhance the performance and efficiency of alkaline polymer electrolyte fuel cells (APEFCs). A sequence of composite anion exchange membranes (AEMs) consisting of poly(vinyl alcohol) (PVA), poly(diallyldimethylammonium chloride) (PDDA), and nano-zirconia (NZ) has been prepared by a solution casting technique. The effect of zirconia mass ratio on attribute and performance of composite AEMs was investigated. The chemical structures, morphology, thermal, and mechanical properties of AEMs were characterized by FTIR, SEM, thermogravimetric analysis, and universal testing machine, respectively. The performance of composite AEMs was verified using water uptake, swelling degree, ion-exchange capacity, and OH− conductivity measurement. The nano-zirconia was homogeneously dispersed in the PVA/PDDA AEMs matrix. The mechanical properties of the composite AEMs were considerably enhanced with the addition of NZ. Through the introduction of 1.5 wt.% NZ, PVA/PDDA/NZ composite AEMs acquired the highest hydroxide conductivity of 31.57 mS·cm−1 at ambient condition. This study demonstrates that the PVA/PDDA/NZ AEMs are a potential candidate for APEFCs application.

Side-chain-type anion exchange membranes bearing pendent imidazolium-functionalized poly(phenylene oxide) for fuel cells

2016 ◽  
Vol 513 ◽  
pp. 206-216 ◽  
Author(s):  
Chen Xiao Lin ◽  
Yi Zhi Zhuo ◽  
Ao Nan Lai ◽  
Qiu Gen Zhang ◽  
Ai Mei Zhu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Anion Exchange ◽  
Side Chain ◽  
Anion Exchange Membranes ◽  
Phenylene Oxide ◽  
Chain Type

scholarly journals Poly(phenylene oxide) functionalized with quaternary ammonium groups via flexible alkyl spacers for high-performance anion exchange membranes

2015 ◽  
Vol 3 (10) ◽  
pp. 5280-5284 ◽  
Author(s):  
Hai-Son Dang ◽  
Eva Annika Weiber ◽  
Patric Jannasch
Keyword(s):  
Anion Exchange ◽  
Quaternary Ammonium ◽  
High Performance ◽  
Ion Conductivity ◽  
Side Chains ◽  
Anion Exchange Membranes ◽  
Hydroxide Ion ◽  
Alkaline Stability ◽  
Phenylene Oxide ◽  
Alkyl Side Chains

Hydroxide ion conductivity and alkaline stability of anion exchange membranes were dramatically improved by placing quaternary ammonium groups on long alkyl side chains.

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