Irreversibility of proton conductivity of Nafion and Nafion-Titania composites at high relative humidity
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Materials for Renewable and Sustainable Energy
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The temperature dependence of the proton
conductivity of Nafion and Nafion–Titania composite in
the hydrated state is investigated. The proton conductivity
of Nafion–Titania measured in two successive heatings
displays irreversibility, a behavior also observed in bare
Nafion. The relationship between the proton transport and
the dynamics of a-relaxation as proved by dielectric
spectroscopy is discussed for Nafion and the composite
electrolytes. The results indicate that in the first heating,
the proton conductivities of Nafion and Nafion–Titania are
modulated only by the glass transition of the ionomer,
whereas in the second heating both the a-relaxation and the
polymer glass transition are coupled to the charge transport. Such features are important for the development of
high-performance electrolytes for high-temperature proton
exchange membrane fuel cells.
Como referenciar
MATOS, BRUNO R.; SANTIAGO, ELISABETE I.; FONSECA, FABIO C. Irreversibility of proton conductivity of Nafion and Nafion-Titania composites at high relative humidity. Materials for Renewable and Sustainable Energy, v. 4, n. 16, 2015. DOI: 10.1007/s40243-015-0057-6. Disponível em: http://repositorio.ipen.br/handle/123456789/25374. 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.