scholarly journals Synthesis of Aromatic Anion Exchange Membranes by Friedel–Crafts Bromoalkylation and Cross-Linking of Polystyrene Block Copolymers

2019 ◽  
Vol 52 (5) ◽  
pp. 2139-2147 ◽  
Author(s):  
Jong Yeob Jeon ◽  
Sungmin Park ◽  
Junyoung Han ◽  
Sandip Maurya ◽  
Angela D. Mohanty ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Anion Exchange ◽  
Cross Linking ◽  
Anion Exchange Membranes

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

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.

Controllable Cross-Linking Anion Exchange Membranes with Excellent Mechanical and Thermal Properties

2018 ◽  
Vol 303 (3) ◽  
pp. 1700462 ◽  
Author(s):  
Chao Wang ◽  
Zhenfeng He ◽  
Xiaofeng Xie ◽  
Xianmin Mai ◽  
Yingchun Li ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Anion Exchange ◽  
Cross Linking ◽  
Mechanical And Thermal Properties ◽  
Anion Exchange Membranes

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 Synthetic approaches for advanced multi-block anion exchange membranes

RSC Advances ◽  
2019 ◽  
Vol 9 (37) ◽  
pp. 21106-21115 ◽  
Author(s):  
Dongwon Shin ◽  
Adam F. Nugraha ◽  
Farid Wijaya ◽  
Sojeong Lee ◽  
Eunyoung Kim ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Anion Exchange ◽  
Functional Groups ◽  
Anion Exchange Membranes ◽  
Synthetic Approaches ◽  
Post Functionalization

Multi-block copolymers bearing ionic functional groups were synthesized through direct polymerization or post-functionalization.

Highly Stable Anion Exchange Membranes with Internal Cross-Linking Networks

2015 ◽  
Vol 25 (17) ◽  
pp. 2583-2589 ◽  
Author(s):  
Wanxing Xu ◽  
Yuyue Zhao ◽  
Zhizhang Yuan ◽  
Xianfeng Li ◽  
Huamin Zhang ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Cross Linking ◽  
Anion Exchange Membranes ◽  
Stable Anion
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