Graphene oxide influence on selected properties of polymer fuel cells based on Nafion |
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| Authors: | Agnieszka Iwan Felipe Caballero-Briones Marek Malinowski Michal Filapek Igor Tazbir Jesus Guerrero-Contreras Sathish-Kumar Kamaraj |
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| Affiliation: | 1. Military Institute of Engineer Technology, Obornicka 136 Str., 50-961, Wroclaw, Poland;2. Instituto Politécnico Nacional, Materials and Technologies for Energy, Health and Environment (GESMAT), CICATA Altamira. Km 14.5 Carretera Tampico-Puerto Industrial Altamira, 89600, Altamira, Mexico;3. Electrotechnical Institute, Division of Electrotechnology and Materials Science, M. Sklodowskiej-Curie 55/61 50-369, Wroclaw, Poland;4. Institute of Chemistry, University of Silesia, 9 Szkolna Str., 40-006, Katowice, Poland;5. National Laboratory of Graphenic Materials, Center of Investigation in Applied Chemistry (CIQA), Saltillo, Coah., Mexico;6. Universidad Politécnica de Aguascalientes, Ingeniería en Energía Calle Paseo San Gerardo No. 207. Fracc. San Gerardo. Aguascalientes, Ags, 20342, Mexico;g. Hydrogen South Africa (HySA) Systems and Validation Centre, SAIAMC, University of the Western Cape, Robert Sobukwe Road, Bellville, Cape Town, South Africa |
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| Abstract: | Graphene oxide (GO) was used as an additive to the anode, to modify the electrochemical properties of polymer fuel cells (PEMFC) based on Nafion. GO was obtained by modified Hummers method and fully characterized by Raman, FTIR, X-ray, TEM, electrochemically (CV) and Surface Area and Porosity Analyzer. PEMFC with a GO-based anode containing about 30% less Pt, was constructed and compared with a cell with standard anodes. The electrodes were electrochemically tested at 25 and 60 °C. A maximum power density of 134 mW/cm2 with a current density of 374 mA/cm2 was achieved for PEMFC with GO-based anode at 60 °C. The electrochemical surface area (ECSA) of the PEMFC with GO-based anode was about two times higher than that of the reference device. The electrochemical characterization as well as the Brunauer–Emmett–Teller (BET) and Barrett–Joyner–Halenda (BJH) analysis indicate that GO in the anode reduced Pt agglomeration, as a consequence of the increased surface area and decreased average pore width, compared with the reference electrode. Well-fitted equivalent circuits were proposed and discussed after an electrochemical impedance spectroscopy study of the constructed devices. |
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| Keywords: | Graphene oxide Polymer fuel cells Pt catalyst Electrochemical properties |
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