Vibrational Spectroscopy and ab Initio Studies of Lithium Bis(oxalato)borate (LiBOB) in Different Solvents

Holomb, R.; Xu, Wu; Markusson, Henrik; Johansson, Patrik; Jacobsson, Per

doi:10.1021/jp0626824

Cited by 54 publications

(32 citation statements)

References 46 publications

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“…It is also observed that the peak intensity gradually increased with the increase of LiDFOB salt in polymer-salt complex. The BOB¯anion also possessed these C═O bonds reported by Holomb et al [29]. The other peaks of pure LiDFOB salt (Fig.…”

Section: Fourier Transform Infrared Spectroscopysupporting

confidence: 70%

Poly(ethylene oxide)-lithium difluoro(oxalato)borate new solid polymer electrolytes: ion–polymer interaction, structural, thermal, and ionic conductivity studies

Polu

Kim

Rhee

2015

Ionics

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Solid polymer electrolytes based on high molecular weight poly(ethylene oxide) (PEO) complexed with lithium difluoro(oxalato)borate (LiDFOB) salt in various EO:Li molar ratios from 30:1 to 8:1 were prepared by using solution casting technique. Ion-polymer interaction, structural, thermal, and ionic conductivity studies have been reported by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), polarized optical microscopy (POM), differential scanning calorimeter (DSC), and impedance analysis. FTIR spectral studies suggested that the interaction of Li + cations with the ether oxygen of PEO, where a triple peak broad band centered at 1105 cm −1 , corresponds to C-O-C stretching and extreme deformation occurs. XRD, POM, and DSC indicated that the inclusion of LiDFOB salt could reduce the crystallinity of PEO. The melting temperature of PEO shifted to lower temperature side by the addition of LiDFOB. The glass transition temperature obtained for the system 10:1 was −38.2°C. An increase in the ionic conductivity from 3.95×10 −9 to 3.18× 10 −5 S/cm at room temperature (23°C) was obtained through the addition of LiDFOB to a high molecular weight PEO. In addition, the ionic conductivity of the polymer electrolyte films followed an Arrhenius relation, and the activation energy decreased with increasing LiDFOB concentration.

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Section: Fourier Transform Infrared Spectroscopysupporting

confidence: 70%

Poly(ethylene oxide)-lithium difluoro(oxalato)borate new solid polymer electrolytes: ion–polymer interaction, structural, thermal, and ionic conductivity studies

Polu

Kim

Rhee

2015

Ionics

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“…The Fourier transform infrared (FTIR) (Fig. 1) spectrum confirms the fundamental vibrational modes of the LiBOB salt and its assignments are presented in Table 2; a similar type of report is given by Holomb et al [16].…”

Section: Synthesis Of Libobsupporting

confidence: 78%

A study on LiBOB-based nanocomposite gel polymer electrolytes (NCGPE) for Lithium-ion batteries

Aravindan

Vickraman

2007

Ionics

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Lithium bis(oxalato)borate (LiBOB) salt-based nanocomposite gel polymer blend electrolyte (PVdF/PVC) membranes have been prepared by solution casting technique for various concentrations of TiO 2 . The effect of anatase structure of nanosized titanium dioxide in the plasticized PVC/PVdF + LiBOB matrix has been observed in the 2:1 salt filler ratio in the impedance measurements that the conductivity is increased one order of magnitude higher than the filler-free electrolyte (1:0 salt:filler ratio). The phase morphology of this electrolyte membrane represents the appearance of the free volume sites for ionic migration.

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“…Fonseca et al [8], for the first time, prepared the PCL:LiClO 4 -based polymer electrolyte for rechargeable batteries. Due to its low cost, low toxicity, stability, and ease of preparation, lithium bis(oxalato)borate (LiBOB) is currently being evaluated as a suitable salt for use in lithium ion battery technology [10]. Also compared with other Li salts, LiBOB salt has low lattice energy making it more suitable to participate in the formation of polymer electrolytes [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Due to its low cost, low toxicity, stability, and ease of preparation, lithium bis(oxalato)borate (LiBOB) is currently being evaluated as a suitable salt for use in lithium ion battery technology [10]. Also compared with other Li salts, LiBOB salt has low lattice energy making it more suitable to participate in the formation of polymer electrolytes [10,11]. Ionic transport in polymer electrolyte is, however, not completely understood and remains an obstacle to achieving the required ambient conductivity [12].…”

Section: Introductionmentioning

confidence: 99%

Li+ ion conduction mechanism in poly (ε-caprolactone)-based polymer electrolyte

Aziz

2013

Iran Polym J

150

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In this work, solid polymer electrolytes based on poly(e-caprolactone) (PCL) with lithium bis(oxalato)borate as a doping salt were prepared by solution cast technique using DMF as a solvent. The electrical DC conductivity and dielectric constant of the solid polymer electrolyte samples were investigated by electrochemical impedance spectroscopy over a frequency range from 50 Hz to 1 MHz. It was found that the DC conductivity increased with increase in the salt concentration to up to 4 wt% and thereafter decreased. Dielectric constant versus salt concentration was used to interpret the decrease in DC conductivity with increase in salt concentration. The DC conductivity as a function of temperature follows Arrhenius behavior in low temperature region, which reveals that ion conduction occurs through successful hopping. The curvature of DC conductivity at high temperatures indicates the contribution of segmental motion to ion conduction. High values for dielectric constant and dielectric loss were observed at low frequencies. The plateau of dielectric constant and dielectric loss at high frequencies can be observed as a result of rapid oscillation of the AC electric field. The HN dielectric function was utilized to study the dielectric relaxation. The experimental and theoretical data of dielectric constant are very close to each other at low temperatures. At high temperatures, the simulated data are more deviated from the experimental curve of dielectric constant due to the dominance of electrode polarization. The non-unity of relaxation parameters (a and b) reveals that the relaxation processes in PCL-based solid electrolyte is a non-Debye type of relaxation.

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Vibrational Spectroscopy and ab Initio Studies of Lithium Bis(oxalato)borate (LiBOB) in Different Solvents

Cited by 54 publications

References 46 publications

Poly(ethylene oxide)-lithium difluoro(oxalato)borate new solid polymer electrolytes: ion–polymer interaction, structural, thermal, and ionic conductivity studies

Poly(ethylene oxide)-lithium difluoro(oxalato)borate new solid polymer electrolytes: ion–polymer interaction, structural, thermal, and ionic conductivity studies

A study on LiBOB-based nanocomposite gel polymer electrolytes (NCGPE) for Lithium-ion batteries

Li+ ion conduction mechanism in poly (ε-caprolactone)-based polymer electrolyte

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