scholarly journals Anion Exchange Membranes Based on Imidazoline Quaternized Polystyrene Copolymers for Fuel Cell Applications

Membranes ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 901
Author(s):  
Li-Cheng Jheng ◽  
Chung-Yen Hsu ◽  
Hong-Yi Yeh
Keyword(s):  
Fuel Cell ◽  
Anion Exchange ◽  
Imidazole Ring ◽  
Alkaline Treatment ◽  
Exchange Capacity ◽  
Anion Exchange Membranes ◽  
Fuel Cell Performance ◽  
Pendent Groups ◽  
Application Potential ◽  
Exchange Membrane

Imidazoline is a five-membered heterocycle derived by the partial reduction of one double bond of the imidazole ring. This work prepared new anion exchange membranes (AEMs) based on imidazoline quaternized polystyrene copolymers bearing N-b-hydroxyethyl oleyl imidazolinium pendent groups to evaluate the application potential for anion exchange membrane fuel cells (AEMFCs). For comparison, an imidazole quaternized polystyrene copolymer was also synthesized. The polymer chemical structure was confirmed by FTIR, NMR, and TGA. In addition, the essential properties of membranes, including ion exchange capacity (IEC), water uptake, and hydroxide conductivity, were measured. The alkaline stabilities of imidazolium-based and imidazolinium-based AEMs were compared by means of the changes in the TGA thermograms, FTIR spectra, and hydroxide conductivity during the alkaline treatment in 1 M KOH at 60 °C for 144 h. The results showed that the imidazolinium-based AEMs exhibited relatively lower hydroxide conductivity (5.77 mS/cm at 70 °C) but much better alkaline stability compared with the imidazolium-based AEM. The imidazolinium-based AEM (PSVBImn-50) retained 92% of its hydroxide conductivity after the alkaline treatment. Besides, the fuel cell performance of the imidazolium-based and imidazolinium-based AEMs was examined by single-cell tests.

Anion exchange membranes with branched ionic clusters for fuel cells

2018 ◽  
Vol 6 (14) ◽  
pp. 5993-5998 ◽  
Author(s):  
Yubin He ◽  
Xiaolin Ge ◽  
Xian Liang ◽  
Jianjun Zhang ◽  
Muhammad A. Shehzad ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Anion Exchange ◽  
Anion Exchange Membrane ◽  
Cell Performance ◽  
Anion Exchange Membranes ◽  
Ionic Clusters ◽  
Fuel Cell Performance ◽  
Exchange Membrane

A highly conductive anion exchange membrane with branched ionic clusters exhibits an excellent fuel cell performance of 266 mW cm−2 at 60 °C.

scholarly journals Phenolphthalein Anilide Based Poly(Ether Sulfone) Block Copolymers Containing Quaternary Ammonium and Imidazolium Cations: Anion Exchange Membrane Materials for Microbial Fuel Cell

Membranes ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 454
Author(s):  
Aruna Kumar Mohanty ◽  
Young-eun Song ◽  
Jung-rae Kim ◽  
Nowon Kim ◽  
Hyun-jong Paik
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Anion Exchange Membrane ◽  
Anion Exchange Membranes ◽  
Good Thermal Stability ◽  
Imidazolium Cations ◽  
Membrane Morphology ◽  
Exchange Membrane

A class of phenolphthalein anilide (PA)-based poly(ether sulfone) multiblock copolymers containing pendant quaternary ammonium (QA) and imidazolium (IM) groups were synthesized and evaluated as anion exchange membrane (AEM) materials. The AEMs were flexible and mechanically strong with good thermal stability. The ionomeric multiblock copolymer AEMs exhibited well-defined hydrophobic/hydrophilic phase-separated morphology in small-angle X-ray scattering and atomic force microscopy. The distinct nanophase separated membrane morphology in the AEMs resulted in higher conductivity (IECw = 1.3–1.5 mequiv./g, σ(OH−) = 30–38 mS/cm at 20 °C), lower water uptake and swelling. Finally, the membranes were compared in terms of microbial fuel cell performances with the commercial cation and anion exchange membranes. The membranes showed a maximum power density of ~310 mW/m2 (at 0.82 A/m2); 1.7 and 2.8 times higher than the Nafion 117 and FAB-PK-130 membranes, respectively. These results demonstrated that the synthesized AEMs were superior to Nafion 117 and FAB-PK-130 membranes.

Improving fuel cell performance of an anion exchange membrane by terminal pending bis-cations on a flexible side chain

2020 ◽  
Vol 595 ◽  
pp. 117483 ◽  
Author(s):  
Yang Wang ◽  
Dongyu Zhang ◽  
Xian Liang ◽  
Muhammad A. Shehzad ◽  
Xinle Xiao ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Anion Exchange ◽  
Anion Exchange Membrane ◽  
Cell Performance ◽  
Side Chain ◽  
Fuel Cell Performance ◽  
Exchange Membrane

Dual exchange membrane fuel cell with sequentially aligned cation and anion exchange membranes for non-humidified operation

2020 ◽  
Vol 596 ◽  
pp. 117745 ◽  
Author(s):  
So Young Lee ◽  
Ji Eon Chae ◽  
Jieun Choi ◽  
Hyun Seo Park ◽  
Dirk Henkensmeier ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Anion Exchange ◽  
Anion Exchange Membranes ◽  
Exchange Membrane

Fundamental characteristics study of anion-exchange PVDF–SiO2 membranes

2012 ◽  
Vol 66 (11) ◽  
pp. 2343-2348 ◽  
Author(s):  
Xingtao Zuo ◽  
Wenxin Shi ◽  
Shuili Yu ◽  
Jiajie He
Keyword(s):  
Anion Exchange ◽  
Vinylidene Fluoride ◽  
Membrane Surface ◽  
Exchange Capacity ◽  
Anion Exchange Membranes ◽  
Blending Method ◽  
Poly Vinylidene Fluoride ◽  
Potential Applications ◽  
Alkaline Membrane ◽  
Exchange Membrane

A new type of poly(vinylidene fluoride)(PVDF)–SiO2 hybrid anion-exchange membrane was prepared by blending method. The anion-exchange groups were introduced by the reaction of epoxy groups with trimethylamine (TMA). Contact angle between water and the membrane surface was measured to characterize the hydrophilicity change of the membrane surface. The effects of nano-sized SiO2 particles in the membrane-forming materials on the membrane mechanical properties and conductivity were also investigated. The experimental results indicated that PVDF–SiO2 anion-exchange membranes exhibited better water content, ion-exchange capacity, conductivity and mechanic properties, and so may find potential applications in alkaline membrane fuel cells and water treatment processes.

scholarly journals Electrospun Composite Proton-Exchange and Anion-Exchange Membranes for Fuel Cells

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6709
Author(s):  
Zhihao Shang ◽  
Ryszard Wycisk ◽  
Peter Pintauro
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Anion Exchange ◽  
High Performance ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Anion Exchange Membranes ◽  
Dry Conditions ◽  
Water Swelling ◽  
Exchange Membrane

A fuel cell is an electrochemical device that converts the chemical energy of a fuel and oxidant into electricity. Cation-exchange and anion-exchange membranes play an important role in hydrogen fed proton-exchange membrane (PEM) and anion-exchange membrane (AEM) fuel cells, respectively. Over the past 10 years, there has been growing interest in using nanofiber electrospinning to fabricate fuel cell PEMs and AEMs with improved properties, e.g., a high ion conductivity with low in-plane water swelling and good mechanical strength under wet and dry conditions. Electrospinning is used to create either reinforcing scaffolds that can be pore-filled with an ionomer or precursor mats of interwoven ionomer and reinforcing polymers, which after suitable processing (densification) form a functional membrane. In this review paper, methods of nanofiber composite PEMs and AEMs fabrication are reviewed and the properties of these membranes are discussed and contrasted with the properties of fuel cell membranes prepared using conventional methods. The information and discussions contained herein are intended to provide inspiration for the design of high-performance next-generation fuel cell ion-exchange membranes.

scholarly journals Radiation-grafted anion-exchange membranes: the switch from low- to high-density polyethylene leads to remarkably enhanced fuel cell performance

2019 ◽  
Vol 12 (5) ◽  
pp. 1575-1579 ◽  
Author(s):  
Lianqin Wang ◽  
Xiong Peng ◽  
William E. Mustain ◽  
John R. Varcoe
Keyword(s):  
Fuel Cell ◽  
Anion Exchange ◽  
High Density Polyethylene ◽  
High Density ◽  
Cell Performance ◽  
Ex Situ ◽  
Anion Exchange Membranes ◽  
Fuel Cell Performance ◽  
Better Than

Radiation-grafted HDPE-based anion-exchange membranes perform better than LDPE-based benchmarks despite exhibiting similar ex situ properties.

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