New functionalized ionic liquids based on pyrrolidinium and piperidinium cations with two ether groups as electrolytes for lithium battery

Fang, Shaohua; Zhang, Zhengxi; Jin, Yide; Yang, Li; Hirano, Shin‐ichi; Tachibana, Kazuhiro; Katayama, Shingo

doi:10.1016/j.jpowsour.2011.02.047

Cited by 107 publications

(101 citation statements)

References 50 publications

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“…The capacities of LNMO with conventional electrolyte were higher than for samples with ionic liquid-based electrolyte. Similar performance has also been observed for LiFePO 4 [24] and LiCoO 2 [25]. [26,27].…”

Section: Structure and Morphologiessupporting

confidence: 81%

LiNi0.5Mn1.5O4 spinel cathode using room temperature ionic liquid as electrolyte

Gao

Feng

Chou

et al. 2013

Electrochimica Acta

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. (2013). Lini0.5mn1.5o4 spinel cathode using room temperature ionic liquid as electrolyte. Electrochimica Acta, 101 ( July), 151-157. Lini0.5mn1.5o4 spinel cathode using room temperature ionic liquid as electrolyte AbstractIn this study, LiNi0.5Mn1.5O4 (LNMO) nanoparticles were prepared as a 5 V cathode material via a rheological phase method and annealed at different temperatures: 680 •C, 750 •C, and 820 •C. The sample annealed at 750 •C shows the best performance. A room temperature ionic liquid (RTIL) containing 1 M lithium bis(trifluoromethanesulfonyl) imide (LiNTf2) in N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl) imide (C4mpyrNTf2) was used as novel electrolyte in conjunction with the LNMO cathodes and their electrochemical properties have been investigated. The results show that the LNMO using RTIL as electrolyte has better coulombic efficiency and comparable discharge capacities to those of the cells assembled with standard liquid electrolyte (1 M LiPF6 in ethylene carbonate/diethyl carbonate). Electrochemical impedance spectroscopy shows that the RTIL is much more stable as the electrolyte for LiNi0.5Mn1.5O4 than the conventional electrolyte.

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Section: Structure and Morphologiessupporting

confidence: 81%

LiNi0.5Mn1.5O4 spinel cathode using room temperature ionic liquid as electrolyte

Gao

Feng

Chou

et al. 2013

Electrochimica Acta

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“…19,20 These properties make them very attractive candidates for use in electrolytes for electrochemical applications. Depending on the cations, imidazolium, 21 pyrrolidinium, 22,23 piperidinium, 24,25 etc. based ionic liquids have gained a considerable attention as electrolyte a Author to whom all correspondences should be addressed: electronic mail: sspag@iacs.res.…”

Section: Introductionmentioning

confidence: 99%

Structure and ionic conductivity of ionic liquid embedded PEO- LiCF3SO3 polymer electrolyte

Karmakar

Ghosh

2014

AIP Advances

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In this paper we have reported electrical and other physical properties of polyethylene oxide (PEO) - LiCF3SO3 polymer electrolytes embedded with 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ionic liquid. The addition of the ionic liquid to PEO- LiCF3SO3 electrolyte increases the amorphous phase content considerably and decreases the glass transition temperature. The relative amounts of different ionic species present in these electrolytes have been determined. It is observed that the fraction of free anions increase with the increase of ionic liquid concentration, whereas the fraction for ion pairs and aggregates show a decreasing trend under the same condition. The ionic conductivity of the PEO- LiCF3SO3 polymer electrolyte embedded with ionic liquid is higher than that of the PEO- LiCF3SO3 electrolyte. The ionic conductivity shows a transition around 323 K. The ionic conductivity above 323 K exhibits Arrhenius behavior with an activation energy, which decreases with the increase of ionic liquid concentration. However, below 323 K the conductivity shows Vogel–Tamman–Fulcher (VTF) type behavior.

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“…In our previous report, replacing one alkyl group in 1,2,3,5-tetraallkylpyrazolium cations with one ether group, could help to reduce the viscosity because the ether group was an electrondonating group which could weaken electrostatic interaction between the cation and anion [6,16]. Besides the electrostatic interaction between the cation and anion, the sizes of cation and anion might also affect the viscosity of ILs.…”

Section: Viscosities Of the Ilsmentioning

confidence: 99%

“…It had been proved that introducing one short ether group into ILs based on guanidinium cations [19e21], quaternary and cyclic quaternary ammonium cations [6,22,23], quaternary phosphonium cations [24], and imidazolium cations could be helpful to reduce the lattice energy of ILs and result in low melting point. In our previous report, replacing one alkyl group in 1,2,3,5-tetraallkylpyrazolium cations with one ether group, could also acquire the ILs with low melting point [16].…”

Section: Melting Point and Thermal Stabilitymentioning

confidence: 99%

“…Introducing different functional groups into cations, can markedly change the physicochemical properties of ILs, and it also affords more choices for applications of ILs [6]. Compared with other functional groups, ether group can reduce the viscosities and melting points of ILs without resulting in obvious degradation of electrochemical stability of ILs, and some ILs with one ether group have been used successfully as electrolytes in lithium battery [7e9].…”

Section: Introductionmentioning

confidence: 99%

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Low-viscosity ether-functionalized pyrazolium ionic liquids as new electrolytes for lithium battery

Chai

Jin

Fang

et al. 2012

Journal of Power Sources

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New functionalized ionic liquids based on pyrrolidinium and piperidinium cations with two ether groups as electrolytes for lithium battery

Cited by 107 publications

References 50 publications

LiNi0.5Mn1.5O4 spinel cathode using room temperature ionic liquid as electrolyte

LiNi0.5Mn1.5O4 spinel cathode using room temperature ionic liquid as electrolyte

Structure and ionic conductivity of ionic liquid embedded PEO- LiCF3SO3 polymer electrolyte

Low-viscosity ether-functionalized pyrazolium ionic liquids as new electrolytes for lithium battery

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