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Silica/montmorillonite nanoarchitectures and layered double hydroxide-SPEEK based composite membranes for fuel cells applications
Anionic and cationic clays were here evaluated as nanofillers of low sulfonated polyetheretherketone (SPEEK, DS = 56%) for preparation of nanocomposite electrolyte membranes for PEMFC (Proton Exchange Membrane Fuel Cells) applications. A synthetic MgAl layered double hydroxide (LDH) exchanged with s...
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Published in: | Applied clay science 2019-06, Vol.174, p.77-85 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Anionic and cationic clays were here evaluated as nanofillers of low sulfonated polyetheretherketone (SPEEK, DS = 56%) for preparation of nanocomposite electrolyte membranes for PEMFC (Proton Exchange Membrane Fuel Cells) applications. A synthetic MgAl layered double hydroxide (LDH) exchanged with sulfate anions and a porous SiO2-montmorillonite heterostructured material containing delaminated clay particles, were added to SPEEK polymer for preparation of composite membranes with different nanofiller content (3, 6 and 9%). The resulting membranes were characterized concerning their structure, morphology and electrical conductivity performance. The incorporation of the MgAl LDH and the SiO2-motmorillonite fillers into the SPEEK seems to enhance water retention and the thermal stability of the resulting composite electrolyte membranes. Moreover, the composite electrolyte membranes show higher proton conductivity than the neat SPEEK membrane (0.023 S cm−1) after incorporation of the LDH and the SiO2-motmorillonite fillers (0.070 and 0.158 S cm−1 respectively) at 120 °C and 100% relative humidity, which can be relevant for increasing the performance at high temperature of this type of membranes in fuel cell applications.
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•MgAl layered double hydroxide and SiO2-montmorillonite were used as fillers of SPEEK composite membranes•The presence of these fillers in the SPEKK composite membranes provides barrier properties towards methanol and good proton conductivity•The resulting SPEEK composite membranes are promising electrolyte systems for fuel cell applications with high efficiency at temperatures above 100 °C |
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ISSN: | 0169-1317 1872-9053 |
DOI: | 10.1016/j.clay.2019.03.027 |