Ion dynamics in halogen-free phosphonium bis(salicylato)borate ionic liquid electrolytes for lithium-ion batteries

Shah, Faiz Ullah; Гнездилов, О. И.; Филиппов, А. В.

doi:10.1039/c7cp02722b

Cited by 26 publications

(28 citation statements)

References 54 publications

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“…The samples were dried in a vacuum oven at 60 °C for more than 2 days before performing the experiments. As recently reported, the maximum solubility of Li[BScB] salt in [P 4,4,4,8 ][BScB] IL is 0.418 mol kg −1 (20 mol%) 37 . In this work, the electrolytes were prepared by mixing diethylene glycol dibutyl ether (DEGDBE) and [P 4,4,4,8 ][BScB] IL in 5:1 molar ratio.…”

Section: Methodsmentioning

confidence: 56%

“…For example, the ionic conductivity of the mixture of [P 4,4,4,8 ][BScB] and DEGDBE (1:5 molar ratio) mixture is found to be 7.3 × 10 −5 S cm −1 and 5.8 × 10 −4 S cm −1 at 20 °C and 100 °C temperatures, respectively. While the ionic conductivity obtained for neat [P 4,4,4,8 ][BScB] IL is 3.3 × 10 −5 S cm −1 at 20 °C and 1.1 × 10 −3 S cm −1 100 °C temperature 37 . The higher ionic conductivity of the neat [P 4,4,4,8 ][BScB] IL at 100 °C temperature reveals efficient dissociation of ions at higher temperature.…”

Section: Resultsmentioning

confidence: 91%

“…T 0 indicates a temperature at which free volume and mobility is reduced to zero 41 . The fitting procedure was performed in two steps, as previously reported 37 . In the first step, ln( η ) was plotted against 1/( T - T 0 ) and selected T 0 to have this dependence linear.…”

Section: Resultsmentioning

confidence: 99%

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Transport and Association of Ions in Lithium Battery Electrolytes Based on Glycol Ether Mixed with Halogen-Free Orthoborate Ionic Liquid

Shah

Гнездилов

Gusain

et al. 2017

Sci Rep

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Ion transport behaviour of halogen-free hybrid electrolytes for lithium-ion batteries based on phosphonium bis(salicylato)borate [P4,4,4,8][BScB] ionic liquid mixed with diethylene glycol dibutyl ether (DEGDBE) is investigated. The Li[BScB] salt is dissolved at different concentrations in the range from 0.15 mol kg−1 to 1.0 mol kg−1 in a mixture of [P4,4,4,8][BScB] and DEGDBE in 1:5 molar ratio. The ion transport properties of the resulting electrolytes are investigated using viscosity, electrical impedance spectroscopy and pulsed-Field Gradient (PFG) NMR. The apparent transfer numbers of ions are calculated from the diffusion coefficients measured by using PFG NMR. PFG NMR data suggested ion association upon addition of Li salt to the [P4,4,4,8][BScB] in DEGDBE solution. This is further confirmed by liquid state 7Li and 11B NMR, and FTIR spectroscopic techniques, which suggest strong interactions between the lithium cation and oxygen atoms of the [BScB]− anion in the hybrid electrolytes.

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Section: Methodsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 91%

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Transport and Association of Ions in Lithium Battery Electrolytes Based on Glycol Ether Mixed with Halogen-Free Orthoborate Ionic Liquid

Shah

Гнездилов

Gusain

et al. 2017

Sci Rep

Self Cite

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“…43 The procedure of fitting was performed in two steps, as described previously. 44 In the first step, ln(D) was plotted against 1/(T À T 0 ) and T 0 was selected to have a dependence linear. Uncertainty in this step was AE10 K. In the second step, the dependence was fitted by a linear regression to obtain the fitting parameters (D 0 , B).…”

Section: Resultsmentioning

confidence: 99%

High CO₂absorption capacity by chemisorption at cations and anions in choline-based ionic liquids

Bhattacharyya

Филиппов

Shah

2017

Phys. Chem. Chem. Phys.

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The effect of CO absorption on the aromaticity and hydrogen bonding in ionic liquids is investigated. Five different ionic liquids with choline based cations and aprotic N-heterocyclic anions were synthesized. Purity and structures of the synthesized ionic liquids were characterized by H andC NMR spectroscopy. CO capture performance was studied at 20 °C and 40 °C under three different pressures (1, 3, 6 bar). The IL [N][4-Triz] showed the highest CO capture capacity (28.6 wt%, 1.57 mol of CO per mol of the IL, 6.48 mol of CO per kg of the ionic liquid) at 20 °C and 1 bar. The high CO capture capacity of the [N][4-Triz] IL is due to the formation of carbonic acid (-OCOH) together with carbamate by participation of the -OH group of the [N] cation in the CO capture process. The structure of the adduct formed by CO reaction with the IL [N][4-Triz] was probed by using IR, C NMR andH-C HMBC NMR experiments utilizing C labeled CO gas. H andC PFG NMR studies were performed before and after CO absorption to explore the effect of cation-anion structures on the microscopic ion dynamics in ILs. The ionic mobility was significantly increased after CO reaction due to lowering of aromaticity in the case of ILs with aromatic N-heterocyclic anions.

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“…Shah et al . have examined the Li[BSCB]‐[P 4448 ][BScB] as a function of temperature and composition to x =0.2.…”

Section: Transport Propertiesmentioning

confidence: 99%

Electrolytes for Lithium (Sodium) Batteries Based on Ionic Liquids: Highlighting the Key Role Played by the Anion

Rüther

Bhatt

Best

et al. 2020

Batteries & Supercaps

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Research since 2000 has clearly shown that ionic liquids (ILs) and their metal salt containing mixtures have good potential to be considered as electrolytes (ILELs) in lithium and other electropositive metal (ion) batteries. This outcome is particularly relevant for the operation of such devices in elevated temperature regimes where ILELs would have a significant advantage over the conventional organic carbonate solvent/LiPF6 electrolytes that, due to their limited thermal stability and flammability, cause concerns about the safety of current LIB technology. There is evidence from a number of review articles that physicochemical properties can be tailored such that ILELs could meet requirements for operating in batteries at lower temperature regimes. By drawing on a broad range of cation/anion combinations, there is further evidence from these papers that within a particular family of cations, the physicochemical properties of ILs and ILELs are largely defined by the anion component. Despite the key role of the anion there are few reviews that have sections dedicated to this aspect. This review surveys the physicochemical, transport and structural properties of ILs (mainly pyrrolidinium salts) and ILELs employing prominent and representative anion classes.

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Ion dynamics in halogen-free phosphonium bis(salicylato)borate ionic liquid electrolytes for lithium-ion batteries

Abstract: This study was focused on the investigation of ion dynamics in halogen-free, hydrophobic, and hydrolytically stable phosphonium bis(salicylato)borate [P 4,4,4,8

Cited by 26 publications

References 54 publications

Transport and Association of Ions in Lithium Battery Electrolytes Based on Glycol Ether Mixed with Halogen-Free Orthoborate Ionic Liquid

Transport and Association of Ions in Lithium Battery Electrolytes Based on Glycol Ether Mixed with Halogen-Free Orthoborate Ionic Liquid

High CO₂absorption capacity by chemisorption at cations and anions in choline-based ionic liquids

Electrolytes for Lithium (Sodium) Batteries Based on Ionic Liquids: Highlighting the Key Role Played by the Anion

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Ion dynamics in halogen-free phosphonium bis(salicylato)borate ionic liquid electrolytes for lithium-ion batteries

Abstract: This study was focused on the investigation of ion dynamics in halogen-free, hydrophobic, and hydrolytically stable phosphonium bis(salicylato)borate [P 4,4,4,8

Cited by 26 publications

References 54 publications

Transport and Association of Ions in Lithium Battery Electrolytes Based on Glycol Ether Mixed with Halogen-Free Orthoborate Ionic Liquid

Transport and Association of Ions in Lithium Battery Electrolytes Based on Glycol Ether Mixed with Halogen-Free Orthoborate Ionic Liquid

High CO2absorption capacity by chemisorption at cations and anions in choline-based ionic liquids

Electrolytes for Lithium (Sodium) Batteries Based on Ionic Liquids: Highlighting the Key Role Played by the Anion

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High CO₂absorption capacity by chemisorption at cations and anions in choline-based ionic liquids