Graphene inclusion effect on anion-exchange membranes properties for alkaline water electrolyzers |
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| Affiliation: | 1. National Institute for Cryogenics and Isotopic Technologies ICSI-Rm. Valcea, ICSI Energy, Uzinei Str. No. 4, 240050, Ramnicu Valcea, Romania;2. Department of Energy and Process Engineering, Faculty of Engineering, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway;3. University Politehnica of Bucharest, Faculty of Applied Chemistry and Materials Sciences, Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, Bucharest, Romania;4. National Research Center for Micro and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Romania;5. National Institute for Research and Development in Chemistry and Petrochemistry, 202 Independentei, 060021 Bucharest, Romania;1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, China;2. Center for Instrumental Analysis, Beijing University of Chemical Technology, Beijing, 100029, China;1. School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, Changzhou University, Changzhou 213164, Jiangsu, China;2. Department of Materials Science and Engineering, the Pennsylvania State University, University Park, PA 16802, United States;3. Jiangnan Graphene Research Institute, Changzhou 213100, Jiangsu, China;4. Micro/Nano Science and Technology Center, Jiangsu University, Zhenjiang 212013, China;1. Department of Energy Storage/Conversion Engineering of Graduate School, Hydrogen and Fuel Cell Research Center, Chonbuk National University, Jeonju, 54896, Republic of Korea;2. R&D Center for CANUTECH, Business Incubation Center and Department of Bioenvironmental Chemistry, Republic of Korea;3. Department of Life Science, Chonbuk National University, Jeonju, 54896, Republic of Korea |
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| Abstract: | The main issues facing the development of Anion Exchange Membranes (AEM) are the low hydroxide ion (OH−) conductivity compared to protons (H+), and the thermal and chemical stability. Based on the its unique two-dimensional structure, graphene is estimated to be one of the best solutions for the hydrogen ions (H+ and OH−) selectivity and conductivity improvement. This work presents the graphene-composite membranes (AEMGrs) preparation and characterization in comparison with commercial FAA3-20® and FAA3-30® membranes from Fumatech. Various amounts of commercial graphene were incorporated into the Fumion® FAA-3 in NMP (10%), solutions which were then used to fabricate new AEMs by the Doctor-Blade (DB) method. Commercial and graphene-composite AEMs were studied by infrared spectroscopy with Fourier Transformation (FTIR), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), scanning electron microscopy (SEM), dynamic mechanical analysis (DMA), water uptake (WU), ion exchange capacity (IEC), and in plane four-points electrochemical impedance spectroscopy (4p-EIS). The results indicated that the composite membranes containing 50 mg of graphene exhibited an improved IEC (3.16 mmol g−1) and OH− conductivity (113.27 mS cm−1) at 80 °C measured in 0.01 M KOH (pH = 12). |
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| Keywords: | Graphene Membrane Anion-exchanger Water electrolysis |
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