Two distinct lithium diffusive species for polymer gel electrolytes containing LiBF4, propylene carbonate (PC) and PVDF

P. M. Richardson; A. M. Voice; I. M. Ward

doi:10.1016/j.ijhydene.2013.04.102

Two distinct lithium diffusive species for polymer gel electrolytes containing LiBF₄, propylene carbonate (PC) and PVDF

P. M. Richardson^*, A. M. Voice, I. M. Ward

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Polymer gel electrolytes have been prepared using lithium tetrafluoroborate (LiBF₄), propylene carbonate (PC) and polyvinylidene fluoride (PVDF) at 20% and 30% concentration by mass. Self diffusion coefficients have been measured using pulse field gradient nuclear magnetic resonance (PFG-NMR) for the cation and anion using ⁷Li and ¹⁹F resonant frequencies respectively. It was found that lithium ion diffusion was slow compared to the much larger fluorine anion likely resulting from a large solvation shell of the lithium. Lithium ion diffusion measurements exhibited two distinct diffusive species, whereas the fluorine ions exhibited only a single diffusive species.

Original language	English
Pages (from-to)	2904-2908
Number of pages	5
Journal	International Journal of Hydrogen Energy
Volume	39
Issue number	6
DOIs	https://doi.org/10.1016/j.ijhydene.2013.04.102
Publication status	Published - 14 Feb 2014

Keywords

Lithium ion diffusion
NMR
Polymer gel electrolyte

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10.1016/j.ijhydene.2013.04.102

Cite this

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title = "Two distinct lithium diffusive species for polymer gel electrolytes containing LiBF4, propylene carbonate (PC) and PVDF",

abstract = "Polymer gel electrolytes have been prepared using lithium tetrafluoroborate (LiBF4), propylene carbonate (PC) and polyvinylidene fluoride (PVDF) at 20% and 30% concentration by mass. Self diffusion coefficients have been measured using pulse field gradient nuclear magnetic resonance (PFG-NMR) for the cation and anion using 7Li and 19F resonant frequencies respectively. It was found that lithium ion diffusion was slow compared to the much larger fluorine anion likely resulting from a large solvation shell of the lithium. Lithium ion diffusion measurements exhibited two distinct diffusive species, whereas the fluorine ions exhibited only a single diffusive species.",

keywords = "Lithium ion diffusion, NMR, Polymer gel electrolyte",

author = "Richardson, {P. M.} and Voice, {A. M.} and Ward, {I. M.}",

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AU - Richardson, P. M.

AU - Voice, A. M.

AU - Ward, I. M.

PY - 2014/2/14

Y1 - 2014/2/14

N2 - Polymer gel electrolytes have been prepared using lithium tetrafluoroborate (LiBF4), propylene carbonate (PC) and polyvinylidene fluoride (PVDF) at 20% and 30% concentration by mass. Self diffusion coefficients have been measured using pulse field gradient nuclear magnetic resonance (PFG-NMR) for the cation and anion using 7Li and 19F resonant frequencies respectively. It was found that lithium ion diffusion was slow compared to the much larger fluorine anion likely resulting from a large solvation shell of the lithium. Lithium ion diffusion measurements exhibited two distinct diffusive species, whereas the fluorine ions exhibited only a single diffusive species.

AB - Polymer gel electrolytes have been prepared using lithium tetrafluoroborate (LiBF4), propylene carbonate (PC) and polyvinylidene fluoride (PVDF) at 20% and 30% concentration by mass. Self diffusion coefficients have been measured using pulse field gradient nuclear magnetic resonance (PFG-NMR) for the cation and anion using 7Li and 19F resonant frequencies respectively. It was found that lithium ion diffusion was slow compared to the much larger fluorine anion likely resulting from a large solvation shell of the lithium. Lithium ion diffusion measurements exhibited two distinct diffusive species, whereas the fluorine ions exhibited only a single diffusive species.

KW - Lithium ion diffusion

KW - NMR

KW - Polymer gel electrolyte

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DO - 10.1016/j.ijhydene.2013.04.102

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JF - International Journal of Hydrogen Energy

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