Charge/discharge characteristics of carbon fiber with graphite structure in organic electrolytes containing lithium trifluoromethanesulfate and lithium hexafluorophosphate
- Yamaguchi Univ., Ube (Japan). Dept. of Applied Chemistry and Chemical Engineering
Carbon and its related materials have been studied extensively as negative electrode materials for rechargeable lithium batteries since they can reversibly intercalate lithium ion. The electrolytic conductivities of lithium trifluoromethanesulfate (LiCF[sub 3]SO[sub 3]) and lithium hexafluorophosphate (LiPF[sub 6]) have been investigated as a function of the solvent composition. The organic solvent tested was ethylene carbonate (EC) or propylene carbonate mixed with 1,2-dimethoxyethane, diethyl carbonate, or dimethyl carbonate (DMC). For each solvent system, the electrolytes containing LiCF[sub 3]SO[sub 3] showed nearly half the values of the conductivity of the corresponding systems with LiPF[sub 6]. High discharge capacities (ca. 200 mAh/g) for charge-discharge cycling of the carbon fiber electrode with a graphite structure were obtained in LiCF[sub 3]SO[sub 3]/EC-based electrolytes. Especially, the highest coulombic efficiency (98%) was obtained in the LiCF[sub 3]SO[sub 3]/EC-DMC system. The EC-based electrolyte systems containing LiCF[sub 3]SO[sub 3] were found to be more compatible with the carbon fiber electrode than the systems containing LiPF[sub 6].
- OSTI ID:
- 7109899
- Journal Information:
- Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:5; ISSN JESOAN; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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250902 -- Energy Storage-- Batteries-- Performance & Testing
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ALKALI METAL COMPOUNDS
BATTERY CHARGING
CARBON FIBERS
CLATHRATES
DATA
ELECTRIC BATTERIES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
EXPERIMENTAL DATA
FIBERS
INFORMATION
LITHIUM COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
PERFORMANCE TESTING
PHYSICAL PROPERTIES
TESTING
VOLTAGE DROP