Communications

The role of diglyme and tetraglyme in the formation of ion transport pathways in gel electrolytes based on polyethylene glycol diacrylate

N. A. Slesarenko^a, A. V. Chernyak^ab, V. I. Volkov^a, K. G. Khatmullina^ac, A. V. Yudina^a, G. Z. Tulibaeva^a, A. A. Slesarenko^a, G. R. Baymuratova^a, A. F. Shestakov^ad, O. V. Yarmolenko<sup>a

a</sup> Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russian Federation
^b Yu. A. Osipyan Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russian Federation
^c National Research University ‘Moscow Power Engineering Institute’, 111250 Moscow, Russian Federation
^d Department of Fundamental Physical and Chemical Engineering, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation

Аннотация: 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.

Ключевые слова: ⁷Li spin relaxation, PFG NMR, LiBF₄, diglyme, tetraglyme, electrochemical impedance, lithium anode, conductivity, diffusion coefficient.

Поступила в редакцию: 04.04.2025
Принята в печать: 29.05.2025

Язык публикации: английский

DOI: 10.71267/mencom.7792

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