The intrinsic anodic stability of several anions comprising solvent-free ionic liquids

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1836540· OSTI ID:220857

Koch, V R; Dominey, L A; Nanjundiah, C ^[1]; Ondrechen, M J ^[2]

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1. Covalent Associates, Inc., Woburn, MA (United States)
2. Northeastern Univ., Boston, MA (United States). Dept. of Chemistry

The advent of lithium-ion or rocking chair rechargeable battery technology has severely stretched the anodic limits of common nonaqueous electrolytes. Salts of the form 1,2-dimethyl-3-propylimidazolium X [where X = AsF{sub 6}{sup {minus}}, PF{sub 6}{sup {minus}}, (CF{sub 3}SO{sub 2}){sub 2}N{sup {minus}}, and (CF{sub 3}SO{sub 2}){sub 3}C{sup {minus}}] were prepared and purified. Linear sweep voltammetry was conducted at 80 C, a temperature at which all four salts were molten, at Pt, W, and glassy carbon working electrodes. The authors found that the intrinsic anodic stability of these anions was in the order (CF{sub 3}SO{sub 2}){sub 3}C{sup {minus}} > (CF{sub 3}SO{sub 2}){sub 2}N{sup {minus}} {approximately} AsF{sub 6}{sup {minus}} > PF{sub 6}{sup {minus}}. These experimental solution-phase oxidation potentials correlated well with gas-phase highest occupied molecular orbital energies calculated by an ab initio technique.

• Sponsoring Organization: USDOE
• OSTI ID: 220857
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 3 Vol. 143; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
ARSENIC FLUORIDES
CARBON COMPOUNDS
CARBON FLUORIDES
CATHODES
COBALT OXIDES
ELECTRIC BATTERIES
ELECTROLYTES
LITHIUM OXIDES
MANGANESE OXIDES
MOLTEN SALTS
NICKEL OXIDES
OXYSULFIDES
PHOSPHORUS FLUORIDES
PLATINUM
REDOX POTENTIAL
STABILITY
TUNGSTEN
VOLTAMETRY