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Polymer gel electrolytes (PGEs) have been prepared using lithium tetrafluoroborate (LiBF4), propylene carbonate (PC) and poly (vinylidene fluoride) (PVDF). Self diffusion coefficients have been measured using pulse field gradient nuclear magnetic resonance (PFG-NMR) for the lithium cation, BF4 anion and solvent molecules using 7Li, 19F and 1H nuclei, respectively. It was found that lithium ion diffusion...
Internal gradients, caused by the magnetic susceptibility difference between the solid surface and imbibed fluids in pores, are a frequently encountered limitation in nuclear magnetic resonance (NMR) analysis of porous materials. The strength of these internal gradients are known to scale with magnetic field strength B0 and their presence prevents quantitative determination of transverse T2 relaxation...
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