Impedance spectroscopy of nonactive metal electrodes at low potentials in propylene carbonate solutions: A comparison to studies of Li electrodes
- Bar-Ilan Univ., Ramat Gan (Israel). Dept. of Chemistry
Surface films formed on nonactive metals (nickel, gold, and silver) in propylene carbonate solutions were investigated using impedance spectroscopy. The salts used included LiClO[sub 4], LiAsF[sub 6], LiBF[sub 4], and LiPF[sub 6], and the impact of their concentration on the properties of the surface films was explored. In addition, the influence of the presence of additives such as O[sub 2], H[sub 2]O, and CO[sub 2] in solutions and the potential of formation on the properties of these surface films was rigorously studied. Using simple methods and simulation programs, it was possible to separate the time constants of the impedance spectra, relate them to different parts of the metal-solution interface, and to calculate the thickness of these surface films from the interfacial capacitances. Following variations of the thickness calculated for the surface films formed in the different systems as a function of applied potential and solution composition, it was possible to study the stability of the surface films, their dissolution rates and the influence of different additives on their stability. For a few systems, ex situ Fourier transform infrared spectroscopy (external reflectance mode) was also applied. The results thus obtained were correlated to previous studies of Li electrodes in the same solutions.
- OSTI ID:
- 7023915
- Journal Information:
- Journal of the Electrochemical Society; (United States), Vol. 141:7; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRIC BATTERIES
ELECTRODES
SURFACE PROPERTIES
ARSENIC FLUORIDES
BORON FLUORIDES
CARBON DIOXIDE
CARBONATES
CHLORATES
COATINGS
ELECTRIC IMPEDANCE
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
OXYGEN
PHOSPHORUS FLUORIDES
WATER VAPOR
ALKALI METAL COMPOUNDS
ARSENIC COMPOUNDS
BORON COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHLORINE COMPOUNDS
ELECTROCHEMICAL CELLS
ELEMENTS
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
IMPEDANCE
LITHIUM HALIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
VAPORS
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries