Effect of aging on the ionic conductivity of polyvinylidenefluoride–hexafluoropropylene (PVdF–HFP) membrane impregnated with different lithium salts

Aravindan, Vanchiappan; Vickraman, P.

doi:10.1007/s12648-012-0078-2

Cited by 9 publications

(2 citation statements)

References 19 publications

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“…The difluoro(oxalato)borate (DFOB – ) anion, also known as oxalyldifluoroborate (ODFB – ), was first reported in a patent application filed in 1999 by Metallgesellschaft AG and in a publication in 2006 by the U.S. Army Research Laboratory (ARL) . The lithium salt with this anion (LiDFOB) has garnered significant interest in recent years for Li-ion battery electrolytes. − Little is known at present, however, about the molecular-level ionic interactions present once this salt is dissolved in the aprotic solvents used for electrolytes. Such knowledge is necessary to understand the origin of electrolyte properties as solvent–salt mixtures consist of a diverse range of solvate species. , …”

Section: Introductionmentioning

confidence: 99%

Solvate Structures and Computational/Spectroscopic Characterization of Lithium Difluoro(oxalato)borate (LiDFOB) Electrolytes

et al. 2013

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Lithium difluoro(oxalato)borate (LiDFOB) is a relatively new salt designed for battery electrolyte usage. Limited information is currently available, however, regarding the ionic interactions of this salt (i.e., solvate formation) when it is dissolved in aprotic solvents. Vibrational spectroscopy is a particularly useful tool for identifying these interactions, but only if the vibrational bands can be correctly linked to specific forms of anion coordination. Single crystal structures of LiDFOB solvates have therefore been used to both explore the DFOB − ...Li + cation coordination interactions and serve as unambiguous models for the assignment of the Raman vibrational bands. The solvate crystal structures determined include (monoglyme) 2 :LiDFOB, (1,2-diethoxyethane) 3/2 :LiDFOB, (acetonitrile) 3 :LiDFOB, (acetonitrile) 1 :LiDFOB, (dimethyl carbonate) 3/2 :LiDFOB, (succinonitrile) 1 :LiDFOB, (adiponitrile) 1 :LiDFOB, (PMDETA) 1 :LiDFOB, (CRYPT-222) 2/3 :LiDFOB, and (propylene carbonate) 1 :LiDFOB. DFT calculations have been incorporated to provide additional insight into the origin (i.e., vibrational modes) of the Raman vibrational bands to aid in the interpretation of the experimental analysis.

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Section: Introductionmentioning

confidence: 99%

Solvate Structures and Computational/Spectroscopic Characterization of Lithium Difluoro(oxalato)borate (LiDFOB) Electrolytes

et al. 2013

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“…[8] A good example of a large anion lithium salt is lithium bis (oxalato)borate, LiBC 4 O 8 (LiBOB) which was originally proposed by Angell and co-workers as the lithium salt for liquid electrolytes. [9,10] LiBOB has been reported to give good conductivity with poly(ethylene oxide) (PEO) [11] and poly(vinylidene fluorideco-hexafluoropropylene) (PVdF:HFP) [12] polymer hosts. The large BOB anions are expected to disrupt the crystallization process of the polymer chains and increase the amorphous component of the polymer electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Polyacrylonitrile-lithium bis(oxalato) borate polymer electrolyte for electrical double layer capacitors

Arof

Shuhaimi

Amirudin

et al. 2013

Polym. Adv. Technol.

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Lithium ion conducting polymer electrolytes based on polyacrylonitrile (PAN) and lithium bis(oxalato)borate (LiBOB) have been prepared and characterized. The polymer electrolytes having PAN:LiBOB weight ratios of 90:10, 80:20, 70:30, 60:40 and 50:50 were prepared using dimethylformamide as solvent. The electrolyte having the composition 50 wt.% PAN–50 wt.% LiBOB shows the highest room temperature conductivity of 2.55 × 10−5 S cm−1. This sample demonstrated a lithium ion transference number of 0.25 and a breakdown voltage of 1.6 V. The highest conducting electrolyte was then sandwiched between two symmetrical carbon electrodes to fabricate an electrical double layer capacitor (EDLC). The EDLCs were characterized using impedance measurement, cyclic voltammetry (CV) and galvanostatic charge–discharge tests. The capacitance obtained from impedance measurement is about 35 F g−1 at frequency 10 mHz. From CV, the capacitance is calculated to be 24 F g−1 at 10 mV s−1 scan rate. The discharge capacitance of the EDLCs is determined in the range from 22 to 10 F g−1 at corresponding discharge currents from 0.2 to 1.5 mA, respectively. This also corresponds to a specific energy from 3.01 to 1.47 W h kg−1 and a specific power from 380 to 474 W kg−1, respectively. Copyright © 2013 John Wiley & Sons, Ltd.

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Tris(pentafluoroethyl)difluorophosphorane: A Versatile Fluoride Acceptor for Transition Metal Chemistry

Föhrenbacher

Krahfuß

Zapf

et al. 2021

Chemistry A European J

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Fluoride abstraction from different types of transition metal fluoride complexes [LnMF] (M=Ti, Ni, Cu) by the Lewis acid tris(pentafluoroethyl)difluorophosphorane (C2F5)3PF2 to yield cationic transition metal complexes with the tris(pentafluoroethyl)trifluorophosphate counterion (FAP anion, [(C2F5)3PF3]−) is reported. (C2F5)3PF2 reacted with trans‐[Ni(iPr2Im)2(ArF)F] (iPr2Im=1,3‐diisopropylimidazolin‐2‐ylidene; ArF=C6F5, 1 a; 4‐CF3‐C6F4, 1 b; 4‐C6F5‐C6F4, 1 c) through fluoride transfer to form the complex salts trans‐[Ni(iPr2Im)2(solv)(ArF)]FAP (2 a‐c[solv]; solv=Et2O, CH2Cl2, THF) depending on the reaction medium. In the presence of stronger Lewis bases such as carbenes or PPh3, solvent coordination was suppressed and the complexes trans‐[Ni(iPr2Im)2(PPh3)(C6F5)]FAP (trans‐2 a[PPh3]) and cis‐[Ni(iPr2Im)2(Dipp2Im)(C6F5)]FAP (cis‐2 a[Dipp2Im]) (Dipp2Im=1,3‐bis(2,6‐diisopropylphenyl)imidazolin‐2‐ylidene) were isolated. Fluoride abstraction from [(Dipp2Im)CuF] (3) in CH2Cl2 or 1,2‐difluorobenzene led to the isolation of [{(Dipp2Im)Cu}2]2+2 FAP− (4). Subsequent reaction of 4 with PPh3 and different carbenes resulted in the complexes [(Dipp2Im)Cu(LB)]FAP (5 a–e, LB=Lewis base). In the presence of C6Me6, fluoride transfer afforded [(Dipp2Im)Cu(C6Me6)]FAP (5 f), which serves as a source of [(Dipp2Im)Cu)]+. Fluoride abstraction of [Cp2TiF2] (7) resulted in the formation of dinuclear [FCp2Ti(μ‐F)TiCp2F]FAP (8) (Cp=η5‐C5H5) with one terminal fluoride ligand at each titanium atom and an additional bridging fluoride ligand.

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Effect of aging on the ionic conductivity of polyvinylidenefluoride–hexafluoropropylene (PVdF–HFP) membrane impregnated with different lithium salts

Cited by 9 publications

References 19 publications

Solvate Structures and Computational/Spectroscopic Characterization of Lithium Difluoro(oxalato)borate (LiDFOB) Electrolytes

Solvate Structures and Computational/Spectroscopic Characterization of Lithium Difluoro(oxalato)borate (LiDFOB) Electrolytes

Polyacrylonitrile-lithium bis(oxalato) borate polymer electrolyte for electrical double layer capacitors

Tris(pentafluoroethyl)difluorophosphorane: A Versatile Fluoride Acceptor for Transition Metal Chemistry

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