Keywords
7Li spin relaxation
conductivity
diffusion coefficient.
diglyme
electrochemical impedance
LiBF4
lithium anode
PFG NMR
tetraglyme
Abstract
The methods of 7Li spin relaxation and pulsed field gradient NMR were used to reveal the features of local transport of Li+ cations in two polymer gel electrolytes containing an ionic liquid, the salt LiBF4 and a solvent, diglyme (G2) or tetraglyme (G4). It was found that the macroscopic mass transfer of Li+ cations is affected by their solvate environment from both glyme solvents and the polymer matrix. In the presence of G4, a denser three-dimensional network is formed, hindering the transport of all ions.
Funders
Ministry of Education and Science of the Russian Federation
124013000743-3 (FFSG-2024-0008)