In situ Raman spectroscopy of lithium electrode surface in ambient temperature lithium secondary battery. Final report
- Jackson State Univ., MS (United States). Dept. of Chemistry
Raman spectroscopy was used to characterize surface layers on lithium electrodes in different solvents such as propylene carbonate (PC), dimethyl carbonate (DMC), diethyl carbonate (DEC), and polyethylene glycol 400 dimethyl ether (PEG400DME). Both DMC and DEC were used singly, and also mixed with either methyl acetate (MA) or methyl formate (MF). The Raman spectra showed that passive films formed on the Li surface in different solvents may have different chemical structures, which changed during the charging and discharging processes. Raman spectroscopy was also applied to characterize zinc electrode surfaces in alkaline solutions. The results suggested that ZnO and Zn(OH){sub 2} formed on the Zn electrode when a passive potential was applied. A solid film of fullerene C{sub 60}, which could be used as a cathode in Li rechargeable batteries, was examined in the PEG400DME solution by both electrochemical and Raman spectroscopy. Cyclic voltammograms (CVs) showed five redox peaks which suggested the formation of C{sub 60}{sup {minus}}, C{sub 60}{sup 2{minus}}, C{sub 60}{sup 3{minus}}, C{sub 60}{sup 4{minus}}, and C{sub 60}{sup 5{minus}}. Raman spectra obtained from a thin C{sub 60} film indicated that the thin fulleride film dissolved in the PEG400DME/LiClO{sub 4} solution at negative potentials.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 10160397
- Report Number(s):
- LBL--33046; ON: DE93015238
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250903
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102
AMBIENT TEMPERATURE
CARBONATES
CARBONIC ACID ESTERS
CHEMICAL AND SPECTRAL PROCEDURES
ELECTRIC BATTERIES
ELECTRODES
ELECTROLYTES
FULLERENES
LITHIUM
MATERIALS, COMPONENTS, AND AUXILIARIES
POLYETHYLENE GLYCOLS
PROGRESS REPORT
RAMAN SPECTRA
RAMAN SPECTROSCOPY
ZINC
ZINC OXIDES