Conductivities and Transport Properties of Gelled Electrolytes with and without an Ionic Liquid for Li and Li-Ion Batteries

Bansal, D.; Cassel, Frank; Croce, F.; Hendrickson, Mary; Plichta, Edward J.; Salomon, Mark

doi:10.1021/jp0443963

Cited by 93 publications

(64 citation statements)

References 10 publications

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“…To further understand the temperature-dependent behavior of the conductivities, the logarithm of the conductivity (j) as a function of the inverse of absolute temperature (1/T), ln j vs. 1/T as seen in Figure 2b, was plotted on the basis of the Arrhenius equation 56 :…”

Section: Electrical Conductivitiesmentioning

confidence: 99%

A promising method for electrodeposition of aluminium on stainless steel in ionic liquid

et al. 2009

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in Wiley InterScience (www.interscience.wiley.com).A promising method for aluminium deposition was proposed by using AlCl 3 /[bmim]Cl (1-butyl-3-methylimidazolium chloride) ionic liquid as electrolyte. By using this novel method, the volatile and flammable organic solvent systems and the high corrosive inorganic molten salts with high temperature can be substituted, and the deposit microstructure can be easily adjusted by changing the current density, temperature and electrolyte composition. The study was performed by means of galvano-static electrolysis and the optimum operating conditions were determined based on the systematic studies of the effects of current density, temperature, molar ratio of AlCl 3 to [bmim]Cl, stirring speed and deposition time on the quality of deposited coatings. The electrical conductivities of electrolytes were also investigated as a function of temperature (298-358 K) and molar ratio of AlCl 3 to [bmim]Cl (from 0.1:1 to 2.0:1). Dense, bright and adherent aluminium coatings were obtained over a wide range of temperature (298-348 K), current densities (8-44 mA/cm 2 ) and molar ratio (1.6:1-2.0:1). Results from the analysis of crystal structure show that all of the electrodeposits exhibit a preferred (200) crystallographic orientation. Temperature has significant influence on the crystallographic orientation and there does not appear to be an apparent impact of current density on it. Analyses of the chronoamperograms indicate that the deposition process of aluminium on stainless steel was controlled by three-dimension nucleation with diffusion-controlled growth and there is a conversion from progressive nucleation to instantaneous nucleation.

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Section: Electrical Conductivitiesmentioning

confidence: 99%

A promising method for electrodeposition of aluminium on stainless steel in ionic liquid

et al. 2009

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“…As a result, RTILs have been employed in such diverse areas as organic synthesis, 4,5 chemical extraction, 6,7 and enzymatic catalysis. 8,9 As RTILs can act as both solvent and electrolyte, they are also being used in an increasing number of electrochemical applications, including supercapacitors, 10,11 batteries, 12,13 dye-sensitized solar cells, 14,15 and electrodeposition. 16,17 First-generation haloaluminate RTILs initially received much attention for electrochemical applications.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Electron Transfer Kinetics at the Ionic Liquid/Metal Interface Studied Using Cyclic Voltammetry and Scanning Electrochemical Microscopy

Taylor

Fulian

et al. 2008

J. Phys. Chem. B

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The electrochemical behavior of a redox-active, ferrocene-modified ionic liquid (1-ferrocenylmethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) in acetonitrile and in an ionic liquid electrolyte (1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) is reported. Reversible electrochemical behavior was observed in each electrolyte with responses typical of those for unmodified ferrocene observed in each medium. In the ionic liquid electrolyte, the diffusion coefficient of the redox-active ionic liquid increased by a factor of 5 upon increasing the temperature from 27 to 90°C. The kinetics of electron transfer across the ionic liquid/electrode interface were studied using cyclic voltammetry, and the standard heterogeneous electron transfer rate constant, k 0 was determined to be 4.25 × 10 -3 cm s -1 . Scanning electrochemical microscopy was then also used to probe the heterogeneous kinetics at the interface between the ionic liquid and the solid electrode and conventional kinetic SECM theory was used to determine k 0 . The k 0 value obtained using SECM was higher than that determined using cyclic voltammetry. These results indicate that SECM is a very useful technique for studying electron transfer dynamics in ionic liquids.

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“…The mixture was continuously stirred for 12 h until a homogenous solution formed. The above process was performed at room temperature, and, then, the solution was heated in vacuum oven at 80 ∘ C for 10 h. This method was applied to prepare nano-ppy/OMMT-ILGPE (see Figure 1(d)) [19][20][21].…”

Section: The Preparation Ofmentioning

confidence: 99%

Effect of Nano-ppy/OMMT on the Physical and Electrochemical Properties of an Ionic Liquid Gel Polymer Electrolyte

Yang

Yao

2018

Journal of Nanomaterials

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A new type of nanopolypyrrole/organically modified montmorillonite-ionic liquid gel polymer electrolyte (ppy/OMMT-ILGPE) is prepared based on nanopolypyrrole/organically modified montmorillonite (ppy/OMMT), N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PP14TFSI), lithium-bis(trifluoromethanesulfonyl) (LiTFSI), polyvinylidene difluoride (PVDF), methyl methacrylate (MMA), and benzoyl peroxide (BPO) by an in situ method. The effect of nano-ppy/OMMT on the physical and electrochemical properties of an ionic liquid gel polymer electrolyte is demonstrated. The results show that nanoppy/OMMT-ILGPE has a porous structure with a large surface area, and the diameter of the pores on the surface is approximately 1-2 m. The Li + transference number of 0.72 is achieved, and the ionic conductivity reaches up to 1.2 × 10 −3 S/cm at room temperature. Nano-ppy/OMMT-ILGPE has good thermal stability and mechanical properties. Meanwhile, nano-ppy/OMMT-ILGPE has fine cycle performance in the Li|nano-ppy/OMMT-ILGPE|LiNi 1/3 Co 1/3 Mn 1/3 O 2 coin cell. The good electrochemistry performance of nano-ppy/OMMT-ILGPE means that it can act as an ideal gel polymer electrolyte material for lithium ion batteries.

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Conductivities and Transport Properties of Gelled Electrolytes with and without an Ionic Liquid for Li and Li-Ion Batteries

Cited by 93 publications

References 10 publications

A promising method for electrodeposition of aluminium on stainless steel in ionic liquid

A promising method for electrodeposition of aluminium on stainless steel in ionic liquid

Heterogeneous Electron Transfer Kinetics at the Ionic Liquid/Metal Interface Studied Using Cyclic Voltammetry and Scanning Electrochemical Microscopy

Effect of Nano-ppy/OMMT on the Physical and Electrochemical Properties of an Ionic Liquid Gel Polymer Electrolyte

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