The influence of the electrochemical and thermal stability of mixtures of ionic liquid and organic carbonate on the performance of high power lithium-ion batteries

Menne, Sebastian; Kühnel, Ruben‐Simon; Balducci, Andrea

doi:10.1016/j.electacta.2012.12.042

Cited by 61 publications

(51 citation statements)

References 20 publications

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“…• C and 1 mol · dm −3 Li + concentration, electrolyte has specific conductivity of 7.3 mS · cm −1 which is the same value as for 0.3 mol · dm −3 LiTFSI in PYR 14 TFSI/PC mixture investigated by Menne et al 31 Specific conductivity of 0.1 mol · dm −3 Li + in PYR 14 TFSI/GBL at 20…”

Section: Resultssupporting

confidence: 51%

Electrochemical Performance of Anatase TiO₂Nanotube Arrays Electrode in Ionic Liquid Based Electrolyte for Lithium Ion Batteries

Zec

Cvjetićanin

Bešter‐Rogač

et al. 2017

J. Electrochem. Soc.

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Ternary electrolyte composed of 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide ionic liquid (PYR 14 TFSI), γ-butyrolactone (GBL) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and anatase TiO 2 nanotube arrays (NTAs) electrode are investigated for the application in new generation of lithium-ion batteries (LIBs). The electrical conductivity and viscosity are measured in the whole composition range at several temperatures. Also, cyclic voltammetry experiments are performed at different temperatures and scan rates. At all scan rates, up to 100 mV · s −1 Ti 4+ /Ti 3+ redox peaks appear designating exceptionally fast intercalation/deintercalation reaction. At the end of cycling the intercalation/deintercalation capacity was 144.8/140.7 mAh · g −1 at current rate 3 C. The diffusion coefficient for Li + extraction from TiO 2 nanotubes (NTs) have been calculated for temperatures from (25 to 55) • C. Activation energy for diffusion was found to be 54.7 kJ/mol (0.57 eV The rapid development of portable electronic devices and technologies significantly increased demand for the next generation of energy storage systems.1 Because of enhanced energy and power density, efficiency and long life, LIBs are currently one of the most promising energy storage devices.2,3 Improvement of safety standards and low impact on human health and environment is essential for large-scale application of LIBs. 4 Safety concerns related to utilization of highly volatile and flammable organic solvents in commercial cells can be addressed by introducing ionic liquids (ILs) as emerging class of fluids.5 Numerous advantages of ILs such as negligible vapor pressure and high chemical and thermal stability make them ideal candidates for their application in LIBs. Potential application of ILs based on a combination of the pyrrolidinium (PYR + ) cation and bis(trifluoromethanesulfonyl)imide (TFSI -) anion as electrolytes in LIBs with long term cycling stability and very good capacity utilization, has been confirmed by several research groups. [6][7][8][9][10][11][12] Nevertheless, the utilization of IL-based electrolytes is usually limited by their high viscosity, which reduces transport capabilities and slows down the chemical processes that occur in these solvents. Mixing of ionic liquids with molecular solvents such as organic carbonates or lactones can reduce viscosity of applied electrolyte. 12-15Among other aprotic solvents, γ-butyrolactone (GBL) is usually applied in new generation of LIBs and other electrochemical devices. Besides its low cost, GBL has wide liquidus range and better thermal stability comparing to alkyl carbonate solvents. 16 In our previous papers we demonstrated that binary mixture of 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, (IM 14 TFSI), and GBL has around 20% higher specific conductivity at low IL mole fractions compared to IM 14 TFSI + propylene carbonate (PC) binary mixture.15,17 Xu et al. observed similar trend in the case of 1-ethyl-3-methylimidazolium dicyanamide (IM 12 DC...

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Section: Resultssupporting

confidence: 51%

Electrochemical Performance of Anatase TiO₂Nanotube Arrays Electrode in Ionic Liquid Based Electrolyte for Lithium Ion Batteries

Zec

Cvjetićanin

Bešter‐Rogač

et al. 2017

J. Electrochem. Soc.

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“…From the LSV, it is observed that the overall electrochemical potential window for this IL electrolyte is found to be almost same (5.7 V) at both these temperatures. This wide potential window is comparable with other investigated pyrrolidinium-based IL electrolyte containing different solutes such as LiTFSI dissolved in PC [16] as well as LiPF 6 dissolved in EC/DMC [14]. The cathodic window is limited by lithium plating, and the anodic window is restricted by the decomposition of organic solvent/ anion of the IL.…”

Section: Resultssupporting

confidence: 50%

“…From this flammability test, it may be concluded that these two ratios are safer than the earlier one for their suitability in the present study. This shows that the non-flammability of the IL electrolyte is safe for battery applications [5,16].…”

Section: Resultsmentioning

confidence: 92%

“…Recently, Menne et al has studied the combination of LiTFSI salt with an organic solvent dissolved in N-butyl,Nmethylpyrrolidinium bis(trifluoromethylsulfonyl)imide (Pyr 14 -TFSI) (50:50 wt%) as an electrolyte for Li battery and the results reveal better thermal stability as well as higher performance than the pristine ILs [16]. Among the different types of the ILs investigated so far, quaternary ammoniumbased cyclic and acyclic cations such as pyrrolidinium, piperidinium and tetraalkylammonium exhibit wide electrochemical window and high cathodic stability towards lithium metal [17].…”

Section: Introductionmentioning

confidence: 98%

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Asymmetric tetraalkyl ammonium cation-based ionic liquid as an electrolyte for lithium-ion battery applications

Selvamani

Suryanarayanan

Velayutham

et al. 2016

J Solid State Electrochem

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Performance of N-butyl N,N,N-triethylammonium bis(trifluoromethanesulfonyl)-imide (N 2224 TFSI) as a room temperature ionic liquid (RTIL) containing ethylene carbonate (EC)/diethylcarbonate (DEC) and lithium salt has been investigated as an electrolyte for lithium-ion battery. The electrolyte is highly resistant to fire during direct exposure to the flame, indicating its non-flammable nature. The overall electrochemical window of the ionic liquid (IL) electrolyte is up to 5.7 V vs. Li metal without any solvent decomposition, as confirmed by linear sweep voltammetry (LSV). The electrolyte has low viscosity (32.9 cPs) and high conductivity (5.23 mS cm −1 ) with effective SEI film-forming ability. The performance of the IL electrolyte has been tested with lithium-ion half cells using LiFePO 4 and mesocarbon microbead (MCMB) electrodes, showing good galvanostatic cycling with high capacity retention of about 84 and 90 %, respectively.

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“…Beyond their traditional usage in fuel cell applications, the category of protic ionic liquids (PILs) has been recently signaled as a potential candidate for battery applications [1]. The presence of hydrogen donors and acceptors in the molecular species forming these ILs, associated to their specific synthesis, induces the formation of extensive H-bond networks that crucially determine their structural and transport properties [2,3].…”

Section: Introductionmentioning

confidence: 99%

<strong>Thermophysical characterization of ionogels of ethylamonium nitrate as advanced electrolytes for electrochemical devices</strong>

Parajó

López

Rodríguez

et al. 2017

Proceedings of the 21st International Electronic Conference on Synthetic Organic Chemistry

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Abstract:Among the multiple applications of ionic liquids (ILs) and ionogels, electrolytes for electrochemical devices have a highlighted position. The interest in mixtures of ILs with alkaline metals salts has increased in the last years, since the presence of some electrochemically active species, is required for any electrochemical application of these designer solvents, e.g. in batteries.Although physical characterization of common ILs, as ethylammonium nitrate (EAN), is extensively performed and published, thermophysical characterization of its ionogels is not yet well developed.In this work, the liquid range and thermal stability of ionogels of EAN and its mixtures with lithium nitrate (LiNO3), an inorganic salt with a common anion, were measured. Differential Scanning Calorimetry was employed to determine the melting and freezing temperatures, observing that the pure IL and mixture melt at 12 ºC and 3 ºC, respectively, whereas no processes associated to the formation of a crystalline phase was observed for ionogels.Moreover, using a thermogravimetric analyzer operating in dynamic and isothermal modes under dry air and nitrogen atmospheres, thermal stability analysis was performed. Pure IL and ionogels showed similar thermogravimetric curves characterized by a loss mass in a single step starting at 200 ºC and finishing at 300 ºC, approximately.

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The influence of the electrochemical and thermal stability of mixtures of ionic liquid and organic carbonate on the performance of high power lithium-ion batteries

Cited by 61 publications

References 20 publications

Electrochemical Performance of Anatase TiO₂Nanotube Arrays Electrode in Ionic Liquid Based Electrolyte for Lithium Ion Batteries

Electrochemical Performance of Anatase TiO₂Nanotube Arrays Electrode in Ionic Liquid Based Electrolyte for Lithium Ion Batteries

Asymmetric tetraalkyl ammonium cation-based ionic liquid as an electrolyte for lithium-ion battery applications

<strong>Thermophysical characterization of ionogels of ethylamonium nitrate as advanced electrolytes for electrochemical devices</strong>

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The influence of the electrochemical and thermal stability of mixtures of ionic liquid and organic carbonate on the performance of high power lithium-ion batteries

Cited by 61 publications

References 20 publications

Electrochemical Performance of Anatase TiO2Nanotube Arrays Electrode in Ionic Liquid Based Electrolyte for Lithium Ion Batteries

Electrochemical Performance of Anatase TiO2Nanotube Arrays Electrode in Ionic Liquid Based Electrolyte for Lithium Ion Batteries

Asymmetric tetraalkyl ammonium cation-based ionic liquid as an electrolyte for lithium-ion battery applications

<strong>Thermophysical characterization of ionogels of ethylamonium nitrate as advanced electrolytes for electrochemical devices</strong>

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Electrochemical Performance of Anatase TiO₂Nanotube Arrays Electrode in Ionic Liquid Based Electrolyte for Lithium Ion Batteries

Electrochemical Performance of Anatase TiO₂Nanotube Arrays Electrode in Ionic Liquid Based Electrolyte for Lithium Ion Batteries