The effect of acetonitrile as an additive on the ionic conductivity of imidazolium-based ionic liquid electrolyte and charge-discharge capacity of its Li-ion battery

Rofika, Rida Nurul Shelni; Honggowiranto, Wagiyo; Jodi, Heri; Sudaryanto, Sudaryanto; Kartini, Evvy; Hidayat, Rahmat

doi:10.1007/s11581-019-02919-4

Cited by 17 publications

(4 citation statements)

References 55 publications

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“…However, these new electrolytes have shown higher thermal stability and wider electrochemical stability windows. One of the possible approaches to increase the ionic conductivity of these electrolytes is to mix them with conventional organic solvents (acetonitrile) 87 or commercial battery solvents (propylene carbonate), 88 which will effectively hinder the ion association and therefore increase the free mobility of ions. However, this may adversely affect the unique properties of ionic-liquid-based electrolytes.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Ion Transport and Electrochemical Properties of Fluorine-Free Lithium-Ion Battery Electrolytes Derived from Biomass

Khan

Гнездилов

Филиппов

et al. 2021

ACS Sustainable Chem. Eng.

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Unlike conventional electrolytes, ionic liquid (IL)-based electrolytes offer higher thermal stability, acceptable ionic conductivity, and a higher electrochemical stability window (ESW), which are indispensable for the proper functioning of Li-ion batteries. In this study, fluorine-free electrolytes are prepared by mixing the lithium furan-2-carboxylate [Li(FuA)] salt with the tetra(n-butyl)phosphonium furan-2-carboxylate [(P 4444 )(FuA)] IL in different molar ratios. The anion of these electrolytes is produced from biomass and agricultural waste on a large scale and, therefore, this study is a step ahead toward the development of renewable electrolytes for batteries. The electrolytes are found to have T onset higher than 568 K and acceptable ionic conductivities in a wide temperature range. The pulsed field gradient nuclear magnetic resonance (PFG-NMR) analysis has confirmed that the (FuA) − anion diffuses faster than the (P 4444 ) + cation in the neat (P 4444 )(FuA) IL; however, the anion diffusion becomes slower than cation diffusion by doping Li salt. The Li + ion interacts strongly with the carboxylate functionality in the (FuA) − anion and diffuses slower than other ions over the whole studied temperature range. The interaction of the Li + ion with the carboxylate group is also confirmed by 7 Li NMR and Fourier transform infrared (FTIR) spectroscopy. The transference number of the Li + ion is increased with increasing Li salt concentration. Linear sweep voltammetry (LSV) suggests lithium underpotential deposition and bulk reduction at temperatures above 313 K.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Ion Transport and Electrochemical Properties of Fluorine-Free Lithium-Ion Battery Electrolytes Derived from Biomass

Khan

Гнездилов

Филиппов

et al. 2021

ACS Sustainable Chem. Eng.

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“…For example, the addition of 8 wt% of acetonitrile to PPC/PIL-6/LiTFSI membranes increased their conductivity up to 3 × 10 −4 S•cm −1 , whereas they exhibited an ionic conductivity of 3 × 10 −3 S•cm −1 at saturation (Table 4, #5 and #6). The positive effect of solvent additives on the ionic conductivity of electrolytes is not surprising [50,51] given that polymer networks swollen in solvents (gel electrolytes) have a conductivity that ranges from 10 −4 to 10 −3 S•cm −1 , whereas liquid electrolytes possess the conductivity in range of 10 −3 S•cm −1 at RT [52,53]. However, in both these systems, the solvent is the dominating component, which manifests itself given the poor mechanical properties of these materials and that solvent leakage easily occurs.…”

Section: Study Of the Ppc-containing Membranes Treated With Acetonitrilementioning

confidence: 99%

Optimizing the Ion Conductivity and Mechanical Stability of Polymer Electrolyte Membranes Designed for Use in Lithium Ion Batteries: Combining Imidazolium-Containing Poly(ionic liquids) and Poly(propylene carbonate)

Kiriy,

Özenler,

Voigt

et al. 2024

IJMS

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State-of-the-art Li batteries suffer from serious safety hazards caused by the reactivity of lithium and the flammable nature of liquid electrolytes. This work develops highly efficient solid-state electrolytes consisting of imidazolium-containing polyionic liquids (PILs) and lithium bis(trifluoromethane sulfonyl)imide (LiTFSI). By employing PIL/LiTFSI electrolyte membranes blended with poly(propylene carbonate) (PPC), we addressed the problem of combining ionic conductivity and mechanical properties in one material. It was found that PPC acts as a mechanically reinforcing component that does not reduce but even enhances the ionic conductivity. While pure PILs are liquids, the tricomponent PPC/PIL/LiTFSI blends are rubber-like materials with a Young’s modulus in the range of 100 MPa. The high mechanical strength of the material enables fabrication of mechanically robust free-standing membranes. The tricomponent PPC/PIL/LiTFSI membranes have an ionic conductivity of 10−6 S·cm−1 at room temperature, exhibiting conductivity that is two orders of magnitude greater than bicomponent PPC/LiTFSI membranes. At 60 °C, the conductivity of PPC/PIL/LiTFSI membranes increases to 10−5 S·cm−1 and further increases to 10−3 S·cm−1 in the presence of plasticizers. Cyclic voltammetry measurements reveal good electrochemical stability of the tricomponent PIL/PPC/LiTFSI membrane that potentially ranges from 0 to 4.5 V vs. Li/Li+. The mechanically reinforced membranes developed in this work are promising electrolytes for potential applications in solid-state batteries.

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“…Metallic ions in liquid electrolytes used in a battery form various metal complexes as a result of ion–solvent and ion–ion interactions. Structural information on such complexes is crucial to obtain a microscopic understanding of the various properties, such as solubility, viscosity, and ionic conductivity. − Furthermore, the formation of the metal complexes is influential to the electrochemical reactions on the interface to the electrodes − and the variation in the surface morphology of the electrodes during charging and discharging . Therefore, determination of the structures of metal complexes will lead us to profound insight into designing a high-performance electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Application of Anomalous X-ray Scattering Method to Liquid Electrolytes Used in a Battery: Local Structural Analysis around a Dilute Metallic Ion

et al. 2020

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In liquid electrolytes used for a battery, various metal complexes are formed as a result of ion–solvent and ion–ion interactions, which strongly influence the properties of the electrolyte and thus the performance of the battery. Therefore, the structural characterization of such complexes is of great importance. In this study, the anomalous X-ray scattering (AXS) technique was applied to the potassium hydroxide solution including ∼0.3 mol % zinc, which is widely used in various batteries such as the alkaline battery. In spite of the small amount of the metallic ions, we have successfully extracted a local structure around zinc after careful data analysis. The obtained pair distribution function exhibited not only the short-range correlation corresponding to the Zn–O bond within the zincate anion but also a medium-range correlation above 3.5 Å. The present study demonstrates the capability of the AXS technique to detect local structures around dilute metallic ions in liquid electrolytes, which will largely extend the applicable range of this technique, especially to the field related to batteries.

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The effect of acetonitrile as an additive on the ionic conductivity of imidazolium-based ionic liquid electrolyte and charge-discharge capacity of its Li-ion battery

Cited by 17 publications

References 55 publications

Ion Transport and Electrochemical Properties of Fluorine-Free Lithium-Ion Battery Electrolytes Derived from Biomass

Ion Transport and Electrochemical Properties of Fluorine-Free Lithium-Ion Battery Electrolytes Derived from Biomass

Optimizing the Ion Conductivity and Mechanical Stability of Polymer Electrolyte Membranes Designed for Use in Lithium Ion Batteries: Combining Imidazolium-Containing Poly(ionic liquids) and Poly(propylene carbonate)

Application of Anomalous X-ray Scattering Method to Liquid Electrolytes Used in a Battery: Local Structural Analysis around a Dilute Metallic Ion

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