Poly(ethylene oxide)-based polymer electrolyte incorporating room-temperature ionic liquid for lithium batteries

Choi, Jaewon; Cheruvally, Gouri; Kim, Yeon-Hwa; Kim, Jae Kwang; Manuel, James; Raghavan, Praveen; Ahn, Jou–Hyeon; Kim, Ki-Won; Ahn, Hyo‐Jun; Choi, Doo Seong; Song, Choong Eui

doi:10.1016/j.ssi.2007.06.006

Cited by 130 publications

(76 citation statements)

References 27 publications

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“…It is observed in that the amorphous phase increases with the increase of EMITf concentration. Thus it is expected that the interaction of the ions, present in the ionic liquid with the ether oxygen of PEO and Li + ions prevents the crystallization of PEO and an increased amount of amorphous phase is produced, 37 supporting the results obtained from XRD data. The ion-ion and ion-polymer interactions in PEO-LiTf-EMITf systems have been studied using FTIR spectroscopy.…”

Section: Resultssupporting

confidence: 74%

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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Section: Resultssupporting

confidence: 74%

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

Karmakar

Ghosh

2014

AIP Advances

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“…BMITFSI has electrochemical stability window of 4.6 V [14], and thus, has a cathodic limit of −2.0 V and an anodic limit of 2.6 V versus Ag/Ag + [30], which is equivalent to 1.2 and 5.8 V versus Li/Li + . On its incorporation in PEs by blending with PEO-LiTFSI [31] and P(VdF-HFP)-LiTFSI [16], a reduction stability well below −1 V was reported. The positive cathodic limit of the RTIL with respect to lithium suggests that it is unsuitable for use in lithium metal batteries, as reported for ethyl-methylimidazole (EMI)-based RTILs [32].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical performance of electrospun poly(vinylidene fluoride-co-hexafluoropropylene)-based nanocomposite polymer electrolytes incorporating ceramic fillers and room temperature ionic liquid

Raghavan

Zhao

Manuel

et al. 2010

Electrochimica Acta

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141

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“…The works with a reasonable discharge capacity (ca. 130 mAh g -1 ) at a moderately increased temperature (40°C) [5,28,29]. Similarly, the temperature effect was found in the case of the Li/ LiFePO 4 cell working together with polymer electrolytes based on the quaternary ammonium cation, [NTf 2 -] anion and different co-polymers [30,31].…”

Section: Sei Formationmentioning

confidence: 56%

“…The LiFePO 4 cathode was studied in a series of ILs or polymer electrolytes based on ILs [5,13,[27][28][29][30][31][32][33]. Ionic liquids were based on pyrazolium, pyrrolidinium, imidazolium and tetraalkylammonium cations as well as -]/ LiFePO 4 cell worked with a capacity of 126 mAh g -1 at a C/10 rate without any molecular additive to the electrolyte [13].…”

Section: Sei Formationmentioning

confidence: 99%

LiFePO4 cathode in N-methyl-N-propylpiperidinium and N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide

2010

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Ternary [Li ? ][MePrPip ? ][NTf 2 -] and [Li ? ] [MePrPyrr ? ][NTf 2 -] room temperature ionic liquids (ILs) were obtained by dissolution of solid lithium bis(trifluoromethanesulfonyl)imide (LiNTf 2 ) in liquid N-methyl-Npropylpiperidinium bis(trifluoromethanesulfonyl)imide and N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide, respectively, and studied as electrolytes for the use in Li/LiFePO 4 or C(Li)/LiFePO 4 batteries. The cell worked properly in the presence of 10 wt% of vinylene carbonate (VC). Impedance-spectroscopy studies showed that the additive (VC) forms a protective coating on the anode. The LiFePO 4 cathode shows good efficiency (135 mAh g -1 ) working together with [Li ? ][MePrPip ? ][NTf 2 -] ? VC and [Li ? ][MePrPyrr ? ][NTf 2 -] ? VC ionic liquid electrolytes.The flash point of ionic liquid electrolytes containing 10 wt% of VC is above 300°C, which makes them practically nonflammable.

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Poly(ethylene oxide)-based polymer electrolyte incorporating room-temperature ionic liquid for lithium batteries

Cited by 130 publications

References 27 publications

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

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

Electrochemical performance of electrospun poly(vinylidene fluoride-co-hexafluoropropylene)-based nanocomposite polymer electrolytes incorporating ceramic fillers and room temperature ionic liquid

LiFePO4 cathode in N-methyl-N-propylpiperidinium and N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide

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