Ionic conductivity and diffusion coefficients of lithium salt polymer electrolytes measured with dielectric spectroscopy
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Scholar |
Otros documentos de la autoría: Munar, Antoni; Andrio, Andreu; Iserte, Rosa; Compañ, Vicente
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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http://dx.doi.org/10.1016/j.jnoncrysol.2011.04.012 |
Metadatos
Título
Ionic conductivity and diffusion coefficients of lithium salt polymer electrolytes measured with dielectric spectroscopyFecha de publicación
2011Editor
ElsevierISSN
0022-3093Cita bibliográfica
Journal of Non-Crystalline Solids (Aug. 2011) vol. 357, no. 16-17, p. 3064-3069Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.sciencedirect.com/science/article/pii/S0022309311003061Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Ionic conductivity, diffusion coefficients, mobility and ionic concentration for lithium salts dissolved in polymer electrolytes are determined by the modeling of the dielectric loss and spectra. Cation and anion ... [+]
Ionic conductivity, diffusion coefficients, mobility and ionic concentration for lithium salts dissolved in polymer electrolytes are determined by the modeling of the dielectric loss and spectra. Cation and anion diffusion coefficients are quantified using the Trukhan model depending on the assumed ratio of the cation to anion diffusion coefficients. Measurements are performed for polymer electrolytes consisting of polyethylene oxide (PEO) with dissolved LiClO4salts for different sample thicknesses and temperatures ranging from 5 to 105 °C, which comprises both the crystalline and amorphous phases of the composite electrolyte. A good phenomenological description of the dielectric loss spectra is obtained for both the semi-crystalline and amorphous phases. The fraction of mobile ions is estimated to vary from 0.002% at 25 °C (semi-crystalline phase) up to 0.05% at 80 °C (amorphous phase). [-]
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