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

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.

Clay modification with silane compounds and characterization of the silicone rubber/clay composites

2012 ◽  
Vol 32 (8-9) ◽  
pp. 493-502 ◽  
Author(s):  
Kyeong Hoon Jang ◽  
Eung-Soo Kim ◽  
Young Ho Jeon ◽  
Jin-San Yoon
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Silicone Rubber ◽  
Cross Linking ◽  
Mechanical And Thermal Properties ◽  
Curing Agent ◽  
Thiol Groups ◽  
Rubber Composites ◽  
Clay Modification

Abstract Na+ montmorillonite (MMT) was modified with benzyldimethyltetradecylammonium chloride (B13) and further with (3-mercaptopropyl)triethoxysilane and vinyltrimethoxysilane to prepare B13-MMT, mercaptomethylorthosilicate modified MMT (MTMO), and vinyltrimethoxysilane modified MMT (VTMO), respectively. The pristine and modified clays were compounded with an HTV-type silicone rubber (GP-30®), and the physical properties and morphology of the resulting rubber composites were examined. Both HTV/MTMO and HTV/VTMO exhibited an intercalated/exfoliated coexisting morphology, but the degree of exfoliation of the former composite was higher than that of the latter. Moreover, the thermal stability, as assessed by the onset temperature of thermal degradation, as well as the tensile stress, elongation at the break, and tear strength of HTV/MTMO was higher than those of HTV/B13-MMT and HTV/VTMO. However, the cross-linking density of HTV/MTMO was the lowest among the composites examined because the thiol groups of MTMO extinguished and abstracted the radicals formed by the curing agent. Accordingly, the improved mechanical and thermal properties of HTV/MTMO were attributed to the enhanced interactions between HTV and MTMO due to the chemical reaction between the thiol groups of MTMO and the vinyl groups of HTV.

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.

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

Fabrication of photocured anion-exchange membranes using water-soluble siloxane resins as cross-linking agents and their application in reverse electrodialysis

2019 ◽  
Vol 573 ◽  
pp. 544-553 ◽  
Author(s):  
SeungCheol Yang ◽  
Won-Sik Kim ◽  
Jiyeon Choi ◽  
Young-Woo Choi ◽  
Namjo Jeong ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Water Soluble ◽  
Cross Linking ◽  
Anion Exchange Membranes ◽  
Reverse Electrodialysis

UV irradiation-induced cross-linked bicarbonate anion exchange membranes based on vinylimidazolium-functionalized poly(arylene ether ketone)

RSC Advances ◽  
2015 ◽  
Vol 5 (70) ◽  
pp. 57067-57075 ◽  
Author(s):  
Fanzhe Bu ◽  
Chengji Zhao ◽  
Baolong Wang ◽  
Na Zhang ◽  
Hao Lu ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Uv Irradiation ◽  
Cross Linking ◽  
Anion Exchange Membranes ◽  
Arylene Ether ◽  
Ether Ketone

A novel photo-cross-linking strategy for vinylimidazolium-functionalized poly(arylene ether ketone) bicarbonate anion exchange membranes is presented.

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