scholarly journals Self-Humidifying Membrane for High-Performance Fuel Cells Operating at Harsh Conditions: Heterojunction of Proton and Anion Exchange Membranes Composed of Acceptor-Doped SnP2O7 Composites

Membranes ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 776
Author(s):  
Pilwon Heo ◽  
Mijeong Kim ◽  
Hansol Ko ◽  
Sang Yong Nam ◽  
Kihyun Kim
Keyword(s):  
Anion Exchange ◽  
High Performance ◽  
Membrane Electrode Assembly ◽  
Membrane Electrode ◽  
Electrochemical Performances ◽  
Anion Exchange Membranes ◽  
Low Humidity ◽  
Novel Method ◽  
Harsh Conditions ◽  
Better Than

Here we suggest a simple and novel method for the preparation of a high-performance self-humidifying fuel cell membrane operating at high temperature (>100 °C) and low humidity conditions (<30% RH). A self-humidifying membrane was effectively prepared by laminating together proton and anion exchange membranes composed of acceptor-doped SnP2O7 composites, Sn0.9In0.1H0.1P2O7/Sn0.92Sb0.08(OH)0.08P2O7. At the operating temperature of 100 °C, the electrochemical performances of the membrane electrode assembly (MEA) with this heterojunction membrane at 3.5% RH were better than or comparable to those of each MEA with only the proton or anion exchange membranes at 50% RH or higher.

scholarly journals Highly conductive anion exchange membranes based on polymer networks containing imidazolium functionalised side chains

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ebrahim Abouzari-Lotf ◽  
Mohan V. Jacob ◽  
Hossein Ghassemi ◽  
Masoumeh Zakeri ◽  
Mohamed Mahmoud Nasef ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Anion Exchange ◽  
Polymer Networks ◽  
Chemical Properties ◽  
Membrane Electrode Assembly ◽  
Operating Conditions ◽  
Membrane Electrode ◽  
Anion Exchange Membranes ◽  
Polyamide 66 ◽  
Syndiotactic Polypropylene

AbstractTwo novel types of anion exchange membranes (AEMs) having imidazolium-type functionalised nanofibrous substrates were prepared using the facile and potentially scalable method. The membranes’ precursors were prepared by graft copolymerization of vinylbenzyl chloride (VBC) onto syndiotactic polypropylene (syn-PP) and polyamide-66 (PA-66) nanofibrous networks followed by crosslinking with 1,8-octanediamine, thermal treatment and subsequent functionalisation of imidazolium groups. The obtained membranes displayed an ion exchange capacity (IEC) close to 1.9 mmol g–1 and ionic (OH-) conductivity as high as 130 mS cm–1 at 80 °C. This was coupled with a reasonable alkaline stability representing more than 70% of their original conductivity under accelerated degradation test in 1 M KOH at 80 °C for 360 h. The effect of ionomer binder on the performance of the membrane electrode assembly (MEA) in AEM fuel cell was evaluated with the optimum membrane. The MEA showed a power density of as high as 440 mW cm−2 at a current density is 910 mA cm−2 with diamine crosslinked quaternized polysulfone (DAPSF) binder at 80 °C with 90% humidified H2 and O2 gases. Such performance was 2.3 folds higher than the corresponding MEA performance with quaternary ammonium polysulfone (QAPS) binder at the same operating conditions. Overall, the newly developed membrane was found to possess not only an excellent combination of physico-chemical properties and a reasonable stability but also to have a facile preparation procedure and cheap ingredients making it a promising candidate for application in AEM fuel cell.

scholarly journals Polystyrene-Based Hydroxide-Ion-Conducting Ionomer: Binder Characteristics and Performance in Anion-Exchange Membrane Fuel Cells

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 690
Author(s):  
Ji Eon Chae ◽  
So Young Lee ◽  
Sung Jong Yoo ◽  
Jin Young Kim ◽  
Jong Hyun Jang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Anion Exchange ◽  
High Performance ◽  
Membrane Electrode Assembly ◽  
Exchange Capacity ◽  
Anion Exchange Membrane ◽  
Membrane Electrode ◽  
Hydroxide Ion ◽  
Ion Conducting ◽  
Exchange Membrane

Polystyrene-based polymers with variable molecular weights are prepared by radical polymerization of styrene. Polystyrene is grafted with bromo-alkyl chains of different lengths through Friedel–Crafts acylation and quaternized to afford a series of hydroxide-ion-conducting ionomers for the catalyst binder for the membrane electrode assembly in anion-exchange membrane fuel cells (AEMFCs). Structural analyses reveal that the molecular weight of the polystyrene backbone ranges from 10,000 to 63,000 g mol−1, while the ion exchange capacity of quaternary-ammonium-group-bearing ionomers ranges from 1.44 to 1.74 mmol g−1. The performance of AEMFCs constructed using the prepared electrode ionomers is affected by several ionomer properties, and a maximal power density of 407 mW cm−2 and a durability exceeding that of a reference cell with a commercially available ionomer are achieved under optimal conditions. Thus, the developed approach is concluded to be well suited for the fabrication of next-generation electrode ionomers for high-performance AEMFCs.

Effects of Cracks on the Mass Transfer of Polymer Electrolyte Membrane Fuel Cell with High Performance Membrane Electrode Assembly

2021 ◽  
Vol 36 (3) ◽  
pp. 318-330
Author(s):  
Jinrong Shi ◽  
Zhigang Zhan ◽  
Di Zhang ◽  
Yuan Yu ◽  
Xiaoxiang Yang ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
High Performance ◽  
Polymer Electrolyte Membrane ◽  
Membrane Electrode Assembly ◽  
Membrane Electrode ◽  
Electrolyte Membrane

scholarly journals Preparation of High Performance and Ultra-Low Platinum Loading Membrane Electrode Assembly for PEMFC Commercial Application

2020 ◽  
Vol 166 (16) ◽  
pp. F1308-F1313
Author(s):  
Shengchu Liu ◽  
Shang Li ◽  
Ruyi Wang ◽  
Yan Rao ◽  
Qing Zhong ◽  
...  
Keyword(s):  
High Performance ◽  
Membrane Electrode Assembly ◽  
Commercial Application ◽  
Membrane Electrode ◽  
Platinum Loading

Degradation study for membrane electrode assembly of anion exchange membrane fuel cell at a single-cell level

2021 ◽  
Author(s):  
Jonghyun Hyun ◽  
Seok-Hwan Yang ◽  
Gisu Doo ◽  
Sungyu Choi ◽  
Dong-Hyun Lee ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Single Cell ◽  
Anion Exchange ◽  
Membrane Electrode Assembly ◽  
Anion Exchange Membrane ◽  
Membrane Electrode ◽  
Single Cell Level ◽  
Cell Level ◽  
Degradation Study ◽  
Exchange Membrane

The durability of the membrane electrode assembly (MEA) is one of the important requirements for the successful commercialization of anion exchange membrane fuel cells (AEMFCs). While chemical stabilities of the...

High-performance porous anion exchange membranes for efficient acid recovery from acidic wastewater by diffusion dialysis

2021 ◽  
Vol 624 ◽  
pp. 119116
Author(s):  
Jiuyang Lin ◽  
Junming Huang ◽  
Jing Wang ◽  
Junwei Yu ◽  
Xinqiang You ◽  
...  
Keyword(s):  
Anion Exchange ◽  
High Performance ◽  
Anion Exchange Membranes ◽  
Acid Recovery ◽  
Diffusion Dialysis ◽  
Acidic Wastewater

High performance anion exchange membranes obtained through graft architecture and rational cross-linking

2014 ◽  
Vol 470 ◽  
pp. 229-236 ◽  
Author(s):  
Jin Ran ◽  
Liang Wu ◽  
Qianqian Ge ◽  
Yaoyao Chen ◽  
Tongwen Xu
Keyword(s):  
Anion Exchange ◽  
High Performance ◽  
Cross Linking ◽  
Anion Exchange Membranes

Development of high performance anion exchange membranes for diffusion dialysis process

2021 ◽  
Vol 221 ◽  
pp. 281-290
Author(s):  
Muhammad Imran Khan ◽  
Jinzhan Su ◽  
Liejin Guo
Keyword(s):  
Anion Exchange ◽  
High Performance ◽  
Anion Exchange Membranes ◽  
Diffusion Dialysis

High Performance Membrane Electrode Assembly Fabricated by Ultrasonic Spray Technique

2019 ◽  
Vol 41 (1) ◽  
pp. 901-907 ◽  
Author(s):  
Xinyu Huang ◽  
William A. Rigdon ◽  
Jay Neutzler ◽  
Diana Larrabee ◽  
Joshua Sightler
Keyword(s):  
High Performance ◽  
Membrane Electrode Assembly ◽  
Membrane Electrode ◽  
Ultrasonic Spray ◽  
Spray Technique
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