Characterization of lithium electrode surface in lithium secondary batteries by in situ Raman spectroscopic methods. Final report, 1 September 1989-31 December 1992

Technical Report · Wed Mar 24 04:00:00 EST 1993

OSTI ID:6279511

Tachikawa, H

Surface layers on lithium electrodes formed in several solvents including dimethyl carbonate (DMC), diethyl carbonate (DEC), polyethylene glycol 400 dimethyl ether (PEG400DME), and propylene carbonate (PC) have been studied by Raman spectroscopy. Both DMC and DEC were used singly, and also mixed with either methyl acetate or methyl formate. 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. A solid film of fullerene C6O, 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 C6O(-), C6O(2-), C6O(3-), C6O(4-), and C6O(5-). Raman spectra obtained from thin C6O film indicated that the thin fulleride film dissolved in the PEG400DME/LiClO(4) solution at negative potentials.... Lithium electrode, Fullerenes, Electrochemistry, Raman spectroscopy.

• Research Organization: Jackson State Univ., MS (United States). Dept. of Chemistry
• OSTI ID: 6279511
• Report Number(s): AD-A-263728/8/XAB; CNN: DAAL03-89-G-0105
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250901* -- Energy Storage-- Batteries-- Design & Development
250903 -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ACETATES
ACETIC ACID ESTERS
ALCOHOLS
ALKALI METALS
ALKENES
BATTERY CHARGING
CARBON
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACID ESTERS
CARBOXYLIC ACID SALTS
CATHODES
CHEMICAL REACTIONS
CHEMISTRY
DEPOSITION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
ELEMENTS
ESTERS
ETHERS
FORMATES
FULLERENES
GLYCOLS
HYDROCARBONS
HYDROXY COMPOUNDS
LASER SPECTROSCOPY
LAYERS
LITHIUM
METALS
METHYL ACETATE
MINIMIZATION
MOLECULAR STRUCTURE
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OXIDATION
OXYGEN COMPOUNDS
PEAKS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POTENTIALS
PROPYLENE
RAMAN SPECTRA
RAMAN SPECTROSCOPY
RESEARCH PROGRAMS
SOLIDS
SOLVENTS
SPECTRA
SPECTROSCOPY
SURFACES