Structural features and proton conductivity of Nafion-CsHSO4 composite membranes
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2016
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BRAZILIAN MRS MEETING, 15th
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Anhydrous solid electrolyte membranes with high proton conductivity at
intermediate temperatures (150 – 250 °C T-range) are considered key materials
for obtaining high power density output in direct alcohol fuel cells (DAFC) and
direct methane fuel cells (DMEFC) [1]. High proton conductivity (~10-2 Scm-1) has
been observed in solid acids (CSP) such as CsHSO4 at T > 140 °C. The use of such
materials in PEFCs has simplified the water management and provided high
current densities at intermediate temperatures. However, CSP thin films are
fragile, water soluble, and the fabrication of low thickness films is a hard task [1].
On the other hand, polymer electrolytes such as Nafion are flexible and easily
obtained in a broad range of thicknesses. However, in anhydrous conditions these
polymeric membranes are electrical insulators. In this context, the fabrication of
composite membranes based on the addition of CsHSO4 into Nafion matrix above
the percolation threshold can substantially improve the proton conductivity at
T > 140 °C. The composite membranes were prepared by the in situ incorporation
of CsHSO4 by the evaporation/precipitation method. The prepared membranes
were characterized by infrared spectroscopy (FTIR), X-ray diffraction (DRX), small
angle X-ray scattering (SAXS) and proton conductivity under N2 flow. Highlystable
proton conducting membranes based on Nafion-CSPs were obtained. The
addition of CsHSO4 into Nafion at high loadings results in a pronounced increase
of the proton conductivity at anhydrous condition. The proton conductivity of such
composites is a result of the combination of the transport and physical properties
of the host matrix and the inorganic filler.
Como referenciar
MATOS, BRUNO R.; MORAES, LETICIA P.R. de; SANTIAGO, ELISABETE I.; FONSECA, FABIO C. Structural features and proton conductivity of Nafion-CsHSO4 composite membranes. In: BRAZILIAN MRS MEETING, 15th, September 25-29, 2016, Campinas, SP. Abstract... p. 256-256. Disponível em: http://repositorio.ipen.br/handle/123456789/27428. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.