The Effect of Electrolyte Composition on the Parameters of Batteries of the Polyimide–Lithium System

G. R. Baymuratova; A. V. Mumyatov; R. R. Kapaev; P. A. Troshin; O. V. Yarmolenko

doi:10.1134/s102319352107003x

The Effect of Electrolyte Composition on the Parameters of Batteries of the Polyimide–Lithium System

G. R. Baymuratova, A. V. Mumyatov, R. R. Kapaev, P. A. Troshin, O. V. Yarmolenko

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

7 Scopus citations

Abstract

Abstract: The effect of the liquid aprotic electrolyte composition on the performance of Li batteries with the polyimide (PI) cathode is studied. The electrolyte systems containing 1 М LiN(CF₃SO₂)₂ (LiTFSI) in the dioxolane/dimethoxyethane mixture (2 : 1) and 1 М LiPF₆ in ethylene carbonate/dimethyl carbonate mixture (1 : 1) are considered. The Li//PI cells are investigated by the methods of cyclic voltammetry (CV), staircase potential electrochemical impedance spectroscopy, and galvanostatic cycling. The electrochemical impedance studies of Li//Li cells show that the resistance of the solid electrolyte layer at the lithium electrode interface with the LiPF₆ electrolyte is one-order-of-magnitude higher as compared with the layer formed at its interface with the LiTFSI electrolyte. The scanning electron microscopic (SEM) data confirm that such layer forms on the PI cathode too. The CV results demonstrate that the electrolyte composition strongly affects the reversibility of redox processes. By cycling the prototypes of Li//PI batteries it is shown that the battery prototype with LiTFSI electrolyte exhibits the better stability of discharge capacity, which allows considering this electrolyte composition as promising for the Li-polyimide system.

Original language	English
Pages (from-to)	725-732
Number of pages	8
Journal	Russian Journal of Electrochemistry
Volume	57
Issue number	7
DOIs	https://doi.org/10.1134/s102319352107003x
State	Published - Jul 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2021, Pleiades Publishing, Ltd.

Funding

This work was supported by the Ministry of Science and Higher Education of the Russian Federation, project no. АААА-А19-119071190044-3. We are grateful to N.N. Dremova (Analytical Center of Collective Use, Institute of Problems of Chemical Physics, Russian Academy of Sciences) for studying the surface of cathodes by the SEM method.

Funders	Funder number
Russian Academy of Sciences
Ministry of Education and Science of the Russian Federation	АААА-А19-119071190044-3

Keywords

aprotic electrolytes
charge–discharge cycling
cyclic voltammetry
electrochemical impedance
lithium battery
polyimide cathode

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title = "The Effect of Electrolyte Composition on the Parameters of Batteries of the Polyimide–Lithium System",

abstract = "Abstract: The effect of the liquid aprotic electrolyte composition on the performance of Li batteries with the polyimide (PI) cathode is studied. The electrolyte systems containing 1 М LiN(CF3SO2)2 (LiTFSI) in the dioxolane/dimethoxyethane mixture (2 : 1) and 1 М LiPF6 in ethylene carbonate/dimethyl carbonate mixture (1 : 1) are considered. The Li//PI cells are investigated by the methods of cyclic voltammetry (CV), staircase potential electrochemical impedance spectroscopy, and galvanostatic cycling. The electrochemical impedance studies of Li//Li cells show that the resistance of the solid electrolyte layer at the lithium electrode interface with the LiPF6 electrolyte is one-order-of-magnitude higher as compared with the layer formed at its interface with the LiTFSI electrolyte. The scanning electron microscopic (SEM) data confirm that such layer forms on the PI cathode too. The CV results demonstrate that the electrolyte composition strongly affects the reversibility of redox processes. By cycling the prototypes of Li//PI batteries it is shown that the battery prototype with LiTFSI electrolyte exhibits the better stability of discharge capacity, which allows considering this electrolyte composition as promising for the Li-polyimide system.",

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author = "Baymuratova, {G. R.} and Mumyatov, {A. V.} and Kapaev, {R. R.} and Troshin, {P. A.} and Yarmolenko, {O. V.}",

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AU - Baymuratova, G. R.

AU - Mumyatov, A. V.

AU - Kapaev, R. R.

AU - Troshin, P. A.

AU - Yarmolenko, O. V.

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N2 - Abstract: The effect of the liquid aprotic electrolyte composition on the performance of Li batteries with the polyimide (PI) cathode is studied. The electrolyte systems containing 1 М LiN(CF3SO2)2 (LiTFSI) in the dioxolane/dimethoxyethane mixture (2 : 1) and 1 М LiPF6 in ethylene carbonate/dimethyl carbonate mixture (1 : 1) are considered. The Li//PI cells are investigated by the methods of cyclic voltammetry (CV), staircase potential electrochemical impedance spectroscopy, and galvanostatic cycling. The electrochemical impedance studies of Li//Li cells show that the resistance of the solid electrolyte layer at the lithium electrode interface with the LiPF6 electrolyte is one-order-of-magnitude higher as compared with the layer formed at its interface with the LiTFSI electrolyte. The scanning electron microscopic (SEM) data confirm that such layer forms on the PI cathode too. The CV results demonstrate that the electrolyte composition strongly affects the reversibility of redox processes. By cycling the prototypes of Li//PI batteries it is shown that the battery prototype with LiTFSI electrolyte exhibits the better stability of discharge capacity, which allows considering this electrolyte composition as promising for the Li-polyimide system.

AB - Abstract: The effect of the liquid aprotic electrolyte composition on the performance of Li batteries with the polyimide (PI) cathode is studied. The electrolyte systems containing 1 М LiN(CF3SO2)2 (LiTFSI) in the dioxolane/dimethoxyethane mixture (2 : 1) and 1 М LiPF6 in ethylene carbonate/dimethyl carbonate mixture (1 : 1) are considered. The Li//PI cells are investigated by the methods of cyclic voltammetry (CV), staircase potential electrochemical impedance spectroscopy, and galvanostatic cycling. The electrochemical impedance studies of Li//Li cells show that the resistance of the solid electrolyte layer at the lithium electrode interface with the LiPF6 electrolyte is one-order-of-magnitude higher as compared with the layer formed at its interface with the LiTFSI electrolyte. The scanning electron microscopic (SEM) data confirm that such layer forms on the PI cathode too. The CV results demonstrate that the electrolyte composition strongly affects the reversibility of redox processes. By cycling the prototypes of Li//PI batteries it is shown that the battery prototype with LiTFSI electrolyte exhibits the better stability of discharge capacity, which allows considering this electrolyte composition as promising for the Li-polyimide system.

KW - aprotic electrolytes

KW - charge–discharge cycling

KW - cyclic voltammetry

KW - electrochemical impedance

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KW - polyimide cathode

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The Effect of Electrolyte Composition on the Parameters of Batteries of the Polyimide–Lithium System

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