NMR study of cation, anion, and solvent mobilities in macroporous poly(vinylidene fluoride).
The mobilities of lithium, PF6- and solvents in the electrolyte LiPF6-(ethylene carbonate-dimethyl carbonate-diethyl carbonate) were measured using the pulsed gradient spin-echo NMR. They were compared to those of the same electrolyte filling a macroporous poly(vinylidene fluoride) membrane. The conductivity decrease resulting in the incorporation of this macroporous membrane and the cationic transport number were analyzed in terms of (i) solvent/polymer and solvent/salt interactions, (ii) ionic dissociation, and (iii) tortuosity.
Saunier
J
J
Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces-LEPMI, UMR 5631 CNRS-Institute National Polytechnique de Grenoble-Université Joseph Fourier, Associé à l'Université J. Fourier, BP 75 38402 Saint-Martin-d'Hères Cédex, France.
Gorecki
W
W
Alloin
F
F
Sanchez
J Y
JY