Polymer electrolyte membranes prepared by pre-irradiation induced graft copolymerization on ETFE for vanadium redox flow battery applications

2017 ◽  
Vol 524 ◽  
pp. 419-427 ◽  
Author(s):  
Xin Li ◽  
Antonio R. dos Santos ◽  
Marco Drache ◽  
Xi Ke ◽  
Uwe Gohs ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Graft Copolymerization ◽  
Polymer Electrolyte Membranes ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrolyte Membranes ◽  
Vanadium Redox

scholarly journals Preparation of Polymer Electrolyte Membranes via Radiation-Induced Graft Copolymerization on Poly(ethylene-alt-tetrafluoroethylene) (ETFE) Using the Crosslinker N,N′-Methylenebis(acrylamide)

Membranes ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 102 ◽  
Author(s):  
Xi Ke ◽  
Marco Drache ◽  
Uwe Gohs ◽  
Ulrich Kunz ◽  
Sabine Beuermann
Keyword(s):  
Polymer Electrolyte ◽  
Graft Copolymerization ◽  
Polymer Electrolyte Membranes ◽  
Vanadium Redox Flow Battery ◽  
High Proton ◽  
Electrolyte Membranes ◽  
Radiation Induced ◽  
Poly Ethylene ◽  
High Degree ◽  
Power Densities

Polymer electrolyte membranes (PEM) prepared by radiation-induced graft copolymerization are investigated. For this purpose, commercial poly(ethylene-alt-tetrafluoroethylene) (ETFE) films were activated by electron beam treatment and subsequently grafted with the monomers glycidyl methacrylate (GMA), hydroxyethyl methacrylate (HEMA) and N,N′-methylenebis(acrylamide) (MBAA) as crosslinker. The target is to achieve a high degree of grafting (DG) and high proton conductivity. To evaluate the electrochemical performance, the PEMs were tested in a fuel cell and in a vanadium redox-flow battery (VRFB). High power densities of 134 mW∙cm−2 and 474 mW∙cm−2 were observed, respectively.

scholarly journals Amphoteric Ion Exchange Membranes Prepared by Preirradiation-Induced Emulsion Graft Copolymerization for Vanadium Redox Flow Battery

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1482 ◽  
Author(s):  
Yu Cui ◽  
Xibang Chen ◽  
Yicheng Wang ◽  
Jing Peng ◽  
Long Zhao ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Photoelectron Spectroscopy ◽  
Graft Copolymerization ◽  
Open Circuit ◽  
Vanadium Redox Flow Battery ◽  
Ion Exchange Membranes ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Aqueous Emulsion ◽  
Vanadium Redox

A series of poly(vinylidene difluoride)-based amphoteric ion exchange membranes (AIEMs) were prepared by preirradiation-induced graft copolymerization of styrene and dimethylaminoethyl methacrylate in an aqueous emulsion media followed by solution casting, sulfonation, and protonation. The effects of absorbed dose and comonomer concentration on grafting yield (GY) were investigated. The highest GY of 44.5% at a low comonomer concentration of 0.9 M could be achieved. FTIR, TGA, and X-ray photoelectron spectroscopy (XPS) confirmed the successful grafting and sulfonation of the as-prepared AIEMs. Properties of the AIEMs such as water uptake, ion exchange capacity (IEC), ionic conductivity, and crossover behavior of VO2+ ions prepared by this novel technique were systematically investigated and compared with those of the commercial Nafion 115 membrane. It was found that at a GY of 28.4%, the AIEMs showed higher IEC and conductivity, lower permeability of VO2+ ions, and a longer time to maintain open circuit voltage than Nafion 115, which was attributed to their high GY and elaborate amphoteric structure. Consequently, this work has paved the way for the development of green and low-cost AIEMs with good performance for vanadium redox flow battery applications.

Low Permeable Hydrocarbon Polymer Electrolyte Membrane for Vanadium Redox Flow Battery

2017 ◽  
Vol 17 (4) ◽  
pp. 2563-2566 ◽  
Author(s):  
Ho-Young Jung ◽  
Geon-O Moon ◽  
Seunghun Jung ◽  
Hee Tak Kim ◽  
Sang-Chai Kim ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrolyte Membrane ◽  
Hydrocarbon Polymer ◽  
Vanadium Redox
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