RT Journal Article
T1 Multiblock copolymers of sulfonated PSU/PPSU Poly(ether sulfone)s as solid electrolytes for proton exchange membrane fuel cells
A1 Ureña Torres, María de las Nieves
A1 Pérez Prior, María Teresa
A1 Rio, Carmen Del
A1 Varez, Alejandro
A1 Sánchez, Jean Yves
A1 Iojoiu, Cristina
A1 Levenfeld Laredo, Belén
AB Sulfonated multiblock copolymers composed of Polysulfone (PSU) and Polyphenylsulfone (PPSU) poly(ether sulfone) segments (SPSU/SPPSU) are synthesized for the first time by polycondensation in a "one-pot two-step synthesis" of commercial monomers, followed by sulfonation reaction with trimethylsilyl chlorosulfonate (TMSCS). Both segments are responsible for proton conductivity, although the PSU block has greater affinity to be sulfonated. Even though no microphase separation is detected, the resulting ionomers exhibit good mechanical properties due to the non-sulfonated blocks remaining and to the high molecular weights of the ionomers. The chemical structure is confirmed by H-1-NMR, F-19-NMR and FTIR analysis. The degree of sulfonation (0.93-1.58) is determined from the IEC values and H-1-NMR spectra. In situ through-plane proton conductivity measured on the MEAs is 34.1 mS cm(-1) at 70 degrees C. A maximum power density of 400 mW cm(-2), a current density of 1100 mA cm(-2) and outstanding thermo-mechanical stability, these proton-conducting membranes can therefore be implemented in PEMFC
PB Elsevier Ltd.
SN 0013-4686
SN 1873-3859 (online)
YR 2019
FD 2019-04-10
LK https://hdl.handle.net/10016/31214
UL https://hdl.handle.net/10016/31214
LA eng
NO This work was supported by mobility grant of IAAB from Universidad Carlos III de Madrid and the Projects from the regional government [Comunidad de Madrid through MATERYENER3CM S2013/MIT-2753 and S2013/MAE-2975 PILCONAER along with European Social Fund (ESF)]. In addition, funds from the Spanish Government, MINECO [MAT2016-78362-C4-3R and ENE2017-86711-C3-1-R] are gratefully acknowledged.
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RD 1 sept. 2024