کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
634590 1456071 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical properties of pore-filled anion exchange membranes and their ionic transport phenomena for vanadium redox flow battery applications
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Electrochemical properties of pore-filled anion exchange membranes and their ionic transport phenomena for vanadium redox flow battery applications
چکیده انگلیسی

Anion exchange membranes (PE/VBC) are successfully synthesized by pore-filling a porous polyethylene (PE) substrate with poly(4-vinylbenzyl chloride) followed by amination with pyridyl functional groups for vanadium redox flow battery (VRFB) applications. The membrane crosslinked with 10% of DVB content (PE/VBC(10)), 33 μm in thickness, exhibits a low swelling ratio of 3.4% and a water uptake of 23%. In addition, the vanadium crossover rate of the PE/VBC(10) membrane is lower than Nafion 117 by 48% at a similar electrical area resistance. Electrochemical properties of the PE/VBC membranes are examined in terms of the transport number and migration of ions as well as the electrical area resistance. Transport numbers for anions of the PE/VBC(10) membranes are 0.96 and 0.97 in NaCl and NaOH solutions, respectively. In acidic solutions of HCl and H2SO4, the membrane shows remarkably higher cation transport numbers of 0.20 and 0.72, which imply that the membrane allows high proton permeation and it is advantageous in VRFB operations. Furthermore, the migration of ions reveals reasonably low fluxes of other cations through the anion exchange membrane. Finally, the energy efficiency of the PE/VBC (10) membrane is 90.2%, higher than Nafion 117 by 5.4%.

Figure optionsDownload high-quality image (254 K)Download as PowerPoint slideHighlights
► Pore-filled anion exchange membranes were fabricated for redox flow batteries.
► Electrochemical properties of anion exchange membranes were examined for RFB systems.
► The PE/VBC membranes showed high cationic transport numbers in acidic solutions.
► Both H+ and SO42− ions are simultaneously transported through the membranes.
► It is advantageous for operations owing to the lower resistance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 428, 1 February 2013, Pages 17–23
نویسندگان
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