Effect of the Solvate Environment of Lithium Cations on the Resistance of the Polymer Electrolyte/Electrode Interface in a Solid-State Lithium Battery.

Autor: Chernyak AV; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS, 142432 Chernogolovka, Russia.; Scientific Center in Chernogolovka RAS, 142432 Chernogolovka, Russia., Slesarenko NA; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS, 142432 Chernogolovka, Russia., Slesarenko AA; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS, 142432 Chernogolovka, Russia., Baymuratova GR; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS, 142432 Chernogolovka, Russia., Tulibaeva GZ; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS, 142432 Chernogolovka, Russia., Yudina AV; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS, 142432 Chernogolovka, Russia., Volkov VI; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS, 142432 Chernogolovka, Russia.; Scientific Center in Chernogolovka RAS, 142432 Chernogolovka, Russia., Shestakov AF; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS, 142432 Chernogolovka, Russia.; Faculty of Fundamental Physical and Chemical Engineering, M. V. Lomonosov Moscow State University, 119991 Moscow, Russia., Yarmolenko OV; Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS, 142432 Chernogolovka, Russia.
Jazyk: angličtina
Zdroj: Membranes [Membranes (Basel)] 2022 Nov 08; Vol. 12 (11). Date of Electronic Publication: 2022 Nov 08.
DOI: 10.3390/membranes12111111
Abstrakt: The effect of the composition of liquid electrolytes in the bulk and at the interface with the LiFePO 4 cathode on the operation of a solid-state lithium battery with a nanocomposite polymer gel electrolyte based on polyethylene glycol diacrylate and SiO 2 was studied. The self-diffusion coefficients on the 7Li, 1H, and 19F nuclei in electrolytes based on LiBF 4 and LiTFSI salts in solvents (gamma-butyrolactone, dioxolane, dimethoxyethane) were measured by nuclear magnetic resonance (NMR) with a magnetic field gradient. Four compositions of the complex electrolyte system were studied by high-resolution NMR. The experimentally obtained 1 H chemical shifts are compared with those theoretically calculated by quantum chemical modeling. This made it possible to suggest the solvate shell compositions that facilitate the rapid transfer of the Li + cation at the nanocomposite electrolyte/LiFePO 4 interface and ensure the stable operation of a solid-state lithium battery.
Databáze: MEDLINE
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