Proton conducting sulfonated polysulfone and polyphenylsulfone multiblock copolymers with improved performances for fuel cell applications
| Autor: | Sydonne Swaby, Nieves Ureña, María Teresa Pérez-Prior, Carmen del Río, Alejandro Várez, Jean-Yves Sanchez, Cristina Iojoiu, Belén Levenfeld |
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| Přispěvatelé: | Agencia Estatal de Investigación (España), European Commission, Ministerio de Economía y Competitividad (España), Comunidad de Madrid, Universidad Carlos III de Madrid |
| Rok vydání: | 2023 |
| Předmět: | |
| Popis: | A series of proton exchange membranes based on sulfonated multiblock copolymers with three polysulfone (PSU) and polyphenylsulfone (PPSU) ratios (50/50, 60/40 and 75/25) are prepared following a synthesis strategy that aims to achieve a microphase separation. A selective sulfonation of PSU blocks was observed in copolymers with a high proportion of PSU. The water uptake is higher in these materials (31% and 57% for SPES 50/50 and SPES 75/25, respectively at 60 °C) while the tensile strength was lower (56.0 MPa and 40.6 MPa for SPES 50/50 and SPES 75/25 in the H form, respectively). Ionic conductivity of SPES 75/25 membranes measured both ex situ and in situ at 80 °C is 25 and 31 mS·cm, respectively. Fuel cell tests reveal that SPES 75/25 shows the highest value for the maximum power density (670 mW·cm at 70 °C and 100% of RH) which is higher than that achieved for SPES 50/50 (400 mW·cm). In addition, the high current density obtained for SPES 75/25 (1000 mA·cm at 0.6 V and 70 °C) compared with SPES50/50 (600 mA·cm) and Nafion 112 (450 mA·cm at 75 °C) shows its promising properties as solid electrolyte in polymeric fuel cells. This work has been supported by Agencia Estatal de Investigación (AEI)/Fondo Europeo de Desarrollo Regional (FEDER/UE) the project MINECO (PID-2019-106662RB-C43). We also wish to thank the Regional Government (Comunidad de Madrid) through three Projects: 1) DROMADER-CM (Y2020/NMT6584) 2) PEM4ENERGY-CM-UC3M and 3) the Multiannual agreement with UC3M (‘‘Excelencia para el Profesorado Universitario” -EPUC3M04) - Fifth regional research plan 2016-2020. We also thank the IAAB from Universidad Carlos III de Madrid for funding the mobility grant to Université Grenoble-Alpes |
| Databáze: | OpenAIRE |
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