Organic composite membrane for hydrogen electrochemical conversion devices
| Autor: | J.C. Cruz, F.I. Espinosa-Lagunes, A. Rico-Zavala, Janet Ledesma-García, M.P. Gurrola, I. Murillo-Borbonio, M.V. Contreras-Martínez, Luis Gerardo Arriaga |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Hydrogen Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element Proton exchange membrane fuel cell 02 engineering and technology Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences Chitosan chemistry.chemical_compound Fuel Technology Membrane chemistry Chemical engineering medicine Swelling medicine.symptom 0210 nano-technology Voltammetry |
| Zdroj: | International Journal of Hydrogen Energy. 45:32493-32507 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.09.003 |
| Popis: | In this research work a blend based on sulfonated poly (ether-ether ketone) (SPEEK) and chitosan was synthesized and characterized as ion-exchange membrane. The material was prepared at different ratio of chitosan: 1, 5 and 10% and characterized by several physicochemical and mechanical techniques. Also, water uptake, dimensional changes (swelling), ion exchange capacity (IEC) and proton conductivity ( σ H + ) were evaluated. The best SPEEK|Chitosan membrane ratio (S-CS 10%, according with proton effective mobility) was tested in a proton exchange fuel cell (PEMFC) as activation method at 37.5 °C, 100% RH, 3 bar (abs). Then, electrochemical hydrogen pumping (EHP) was tested, where 1796 mA cm−2 of limit current density at 1 V, 37.5 °C, 100% RH and 1 bar (abs) was measured by linear swept voltammetry at 50 mV s−1, low hydrogen crossover (even one order of magnitude less than commercial Nafion® membrane) and was possible hydrogen pumping at 600 mA cm−2 with 0.15 V for 1 h without any overheating caused by the applied current. |
| Databáze: | OpenAIRE |
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