Mobility and ionic association of lithium and quaternary ammonium salts in propylene carbonate and [gamma]-butyrolactone

Journal Article · Thu Dec 01 00:00:00 EST 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2059336· OSTI ID:6604833

Ue, Makoto ^[1]

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1. Mitsubishi Petrochemical Co., Ltd., Ibaraki (Japan). Tsukuba Research Center

Propylene carbonate (PC) and [gamma]-butyrolactone (GBL) are important dipolar aprotic solvents used for nonaqueous electrolytes in high energy lithium batteries, aluminum electrolytic capacitors, and electrical double-layer capacitors. The conductivities of lithium and quaternary ammonium salts have been measured in propylene carbonate and [gamma]-butyrolactone at 25 C over the concentration range of 10[sup [minus]2] to 10[sup [minus]3] mol dm[sup [minus]3]. The limiting molar conductivities and the ionic association constants were calculated by the expanded Fuoss-Hsia equation. The mobility of anions in both solvents decreased in the following order: BF[sub 4][sup [minus]] > ClO[sub 4][sup [minus]] > PF[sub 6][sup [minus]] > CF[sub 3]SO[sub 3][sup [minus]] > (CF[sub 3]SO[sub 2])[sub 2]N[sup [minus]] > C[sub 4]F[sub 9]SO[sub 3][sup [minus]] > BPh[sub 4][sup [minus]]. The association constants increased in the following order: Li(CF[sub 3]SO[sub 2])[sub 2]N, LiAsF[sub 6] < LiAsF[sub 6] < LiClO[sub 4] < LiBF[sub 4] < LiC[sub 4]F[sub 9]SO[sub 3] < LiCF[sub 3]SO[sub 3], while those of the corresponding tetraethylammonium salts were leveled by electrostatic shielding effect of alkyl groups. These results were correlated with ionic radii obtained by MM2 calculation.

• OSTI ID: 6604833
• Journal Information: Journal of the Electrochemical Society; (United States), Vol. 141:12; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
25 ENERGY STORAGE
AMMONIUM COMPOUNDS
IONIC CONDUCTIVITY
ELECTRIC BATTERIES
ELECTROLYTES
LITHIUM COMPOUNDS
ARSENIC FLUORIDES
BORON FLUORIDES
CARBON FLUORIDES
CARBON NITRIDES
CHARGE CARRIERS
CHLORATES
EXPERIMENTAL DATA
NONAQUEOUS SOLVENTS
PHOSPHORUS FLUORIDES
SULFATES
ALKALI METAL COMPOUNDS
ARSENIC COMPOUNDS
BORON COMPOUNDS
CARBON COMPOUNDS
CHLORINE COMPOUNDS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
SOLVENTS
SULFUR COMPOUNDS
400400* - Electrochemistry
360606 - Other Materials- Physical Properties- (1992-)
250903 - Energy Storage- Batteries- Materials
Components
&amp; Auxiliaries