КФУ. Карточка публикации. Structural and Ion Dynamics in Fluorine-Free Oligoether Carboxylate Ionic Liquid-Based Electrolytes

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STRUCTURAL AND ION DYNAMICS IN FLUORINE-FREE OLIGOETHER CARBOXYLATE IONIC LIQUID-BASED ELECTROLYTES

Форма представления

Статьи в зарубежных журналах и сборниках

Год публикации

2020

Язык

английский

Авторы, сотрудники КФУ

Гнездилов Олег Иванович, автор

Филиппов Андрей Васильевич, автор

Библиографическое описание на языке оригинала

Shah F.U, Gnezdilov O.I, Khan I.A, Structural and Ion Dynamics in Fluorine-Free Oligoether Carboxylate Ionic Liquid-Based Electrolytes//Journal of Physical Chemistry B. - 2020. - Vol. 124., P.- 9670-9700

Аннотация

we investigate the physicochemical and electrochemical properties of fluorine-free ionic liquid (IL)-based electrolytes with two different cations, tetrabutylphosphonium, (P4,4,4,4)+, and tetrabutylammonium, (N4,4,4,4)+, coupled to a new anion, 2-[2-(2-methoxyethoxy)ethoxy]acetate anion (MEEA)−, for both neat and (P4,4,4,4)(MEEA) also doped with 10−40 mol % of Li(MEEA). We find relatively weaker cation−anion interactions in (P4,4,4,4)(MEEA) than in (N4,4,4,4)(MEEA), and for both ILs, the structural flexibility of the oligoether functionality in the anion results in low glass transition temperatures, also for the electrolytes made. The pulsed field gradient nuclear magnetic resonance (PFG NMR) data suggest faster diffusion of the (MEEA)− anion than (P4,4,4,4)+ cation in the neat IL, but the addition of a Li salt results in slightly lower mobility of the former than the latter and lower ionic conductivity. This agrees with the combined 7Li NMR and attenuated total reflection−Fourier transform infrared (ATR−FTIR) spectroscopy data, which unambiguously reveal preferential interactions between the lithium cations and the carboxylate groups of the IL anions, which also increased as a function of the lithium salt concentration. In total, these systems provide a stepping stone for further design of fluorine-free and low glass transition temperature IL-based electrolytes and also stress how crucial it is to control the strength of ion−ion interactions.

Ключевые слова

fluorine-free ionic liquids, electrolytes, pulsed field gradient nuclear magnetic resonance, conductivity, diffusion, cation−anion interactions

Название журнала

Journal of Physical Chemistry B

URL

https://dx.doi.org/10.1021/acs.jpcb.0c04749facs.jpcb.0c04749&partnerID=40&md5=6c7fa77a2cf970afaa0b3e5cb4590087

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https://repository.kpfu.ru/?p_id=242049

Полная запись метаданных

Поле DC	Значение	Язык
dc.contributor.author	Гнездилов Олег Иванович	ru_RU
dc.contributor.author	Филиппов Андрей Васильевич	ru_RU
dc.date.accessioned	2020-01-01T00:00:00Z	ru_RU
dc.date.available	2020-01-01T00:00:00Z	ru_RU
dc.date.issued	2020	ru_RU
dc.identifier.citation	Shah F.U, Gnezdilov O.I, Khan I.A, Structural and Ion Dynamics in Fluorine-Free Oligoether Carboxylate Ionic Liquid-Based Electrolytes//Journal of Physical Chemistry B. - 2020. - Vol. 124., P.- 9670-9700	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/?p_id=242049	ru_RU
dc.description.abstract	Journal of Physical Chemistry B	ru_RU
dc.description.abstract	we investigate the physicochemical and electrochemical properties of fluorine-free ionic liquid (IL)-based electrolytes with two different cations, tetrabutylphosphonium, (P4,4,4,4)+, and tetrabutylammonium, (N4,4,4,4)+, coupled to a new anion, 2-[2-(2-methoxyethoxy)ethoxy]acetate anion (MEEA)−, for both neat and (P4,4,4,4)(MEEA) also doped with 10−40 mol % of Li(MEEA). We find relatively weaker cation−anion interactions in (P4,4,4,4)(MEEA) than in (N4,4,4,4)(MEEA), and for both ILs, the structural flexibility of the oligoether functionality in the anion results in low glass transition temperatures, also for the electrolytes made. The pulsed field gradient nuclear magnetic resonance (PFG NMR) data suggest faster diffusion of the (MEEA)− anion than (P4,4,4,4)+ cation in the neat IL, but the addition of a Li salt results in slightly lower mobility of the former than the latter and lower ionic conductivity. This agrees with the combined 7Li NMR and attenuated total reflection−Fourier transform infrared (ATR−FTIR) spectroscopy data, which unambiguously reveal preferential interactions between the lithium cations and the carboxylate groups of the IL anions, which also increased as a function of the lithium salt concentration. In total, these systems provide a stepping stone for further design of fluorine-free and low glass transition temperature IL-based electrolytes and also stress how crucial it is to control the strength of ion−ion interactions.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	fluorine-free ionic liquids	ru_RU
dc.subject	electrolytes	ru_RU
dc.subject	pulsed field gradient nuclear magnetic resonance	ru_RU
dc.subject	conductivity	ru_RU
dc.subject	diffusion	ru_RU
dc.subject	cation−anion interactions	ru_RU
dc.title	Structural and Ion Dynamics in Fluorine-Free Oligoether Carboxylate Ionic Liquid-Based Electrolytes	ru_RU
dc.type	Статьи в зарубежных журналах и сборниках	ru_RU