Phase diagrams, molar volumes, heat capacities, conductivities and viscosities of some lithium salts in aprotic solvents

Perron, Gérald; Couture, Lorraine; Lambert, Daniel; Desnoyers, Jacques E.

doi:10.1016/0022-0728(93)80368-r

Cited by 31 publications

(26 citation statements)

References 32 publications

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“…For example, with a flow instrument, a heat capacity cannot be measured to better than 0.5% and often the absolute error can be of the order of 1-2% (proper references, presence of impurities, etc). Also, as noted previously (15,21), the calibration constants of some flow densimeters are slightly different for aqueous and nonaqueous systems. While this source of error hardly affects the reduced excess volumes of aqueous-organic mixtures, it affects systematically the absolute values of V2,, by about 0.07 cm3 mol-' with the densimeter used.…”

Section: Resultsmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

“…The volumes, heat capacities, and, to a lesser extent, compressibilities of electrolytes were measured in AN (12), PC (13,14), and BUTY and DME (15). Transport properties were also measured with some systems (15). A simple association model has been proposed for the interpretation of the thermodynamic properties of electrolytes in acetonitrile (16) and work under way (17) shows that the Bjerrum association model can account quantitatively for the low concentration dependence of the partial molar volumes of electrolytes in aprotic solvents.…”

Section: Introductionmentioning

confidence: 99%

“…It is therefore expected that the V2,, of LiCIOJ would also vary nearly linearly with the mole fraction of the mixed solvent at other salt concentrations. This of course would not be true if measurements could be made at very low concentrations where the electrolytes would be dissociated (15). V,., of LiBr varies nearly linearly in BUTY but decreases significantly at low concentration in DME.…”

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confidence: 99%

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Some thermodynamic and transport properties of lithium salts in mixed aprotic solvents and the effect of water on such properties

Couture¹,

Desnoyers²,

Perron³

1996

Can. J. Chem.

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In a continuing study on the optimization of the electrolyte medium for high-energy lithium batteries, volumes, heat capacities, and specific conductivities of LiC10, and LiBr were measured in mixtures of y-butyrolactone (BUTY) and 1,2-dimethoxyethane (DME) and of propylene carbonate (PC) and BUTY. These results are compared with those of the electrolytes in the pure solvents. Phase diagrams are also reported when appropriate. The effect of addition of water to these binary and ternary systems was investigated with the same techniques. The mixtures DME-BUTY, PC-DME, DME-H,O, and BUTY-H,O are typical of mixtures oTaprotic solvents and mixtures of aprotic solvents and water. The electrolytes at high concentrations in aprotic solvents of low dielectric constants are largely associated. The medium still conducts electrolytically since the ion pairs are in a state that resembles to a large extent that of a molten salt. With some systems at high concentration, stable solvates persist in the solution medium, as evidenced mostly by heat capacities, and are in equilibrium with either the excess solvent or unsolvated molten salts. In mixed solvents, the properties of electrolytes can largely be predicted from the binary systems and by the coexistence of these solvates. The properties of water in DME, BUTY, or mixtures of the two solvents are modified significantly in the presence of LiBr but only slightly with LiCIO,. These specific interactions, which affect the heat capacities much more than the volumes and which are especially large with the system LiBr-DME, could be responsible for the decrease in reactivity of water with lithium metal in an aprotic medium in the presence of certain electrolytes.

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Section: Resultsmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Some thermodynamic and transport properties of lithium salts in mixed aprotic solvents and the effect of water on such properties

Couture¹,

Desnoyers²,

Perron³

1996

Can. J. Chem.

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“…Molar volumes of some electrolytes have been reported in ethylene carbonate (EC) [3], acetonitrile (AN) [4] and dimethoxyethane (DME) [4]. However, no data are available in the mixed solvents involving EC.…”

Section: Introductionmentioning

confidence: 97%

Standard partial molar volumes of some electrolytes in ethylene carbonate based mixtures

Zhao¹,

Wang²,

Lü³

et al. 2004

The Journal of Chemical Thermodynamics

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Model system for concentrated electrolyte solutions: Thermodynamic and transport properties of ethylammonium nitrate in acetonitrile and in water

1993

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Phase diagrams, molar volumes, heat capacities, conductivities and viscosities of some lithium salts in aprotic solvents

Cited by 31 publications

References 32 publications

Some thermodynamic and transport properties of lithium salts in mixed aprotic solvents and the effect of water on such properties

Some thermodynamic and transport properties of lithium salts in mixed aprotic solvents and the effect of water on such properties

Standard partial molar volumes of some electrolytes in ethylene carbonate based mixtures

Model system for concentrated electrolyte solutions: Thermodynamic and transport properties of ethylammonium nitrate in acetonitrile and in water

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