Application of metallocenes in rechargeable lithium batteries for overcharge protection
- Moli Energy Ltd., Burnaby, British Columbia V5C 4G2 (CA)
One problem encountered in the development of rechargeable lithium batteries is the protection of individual cells from overcharging. In this paper the addition of metallocene derivatives to cell electrolytes to provide overcharge protection was investigated. Eleven ferrocene derivatives were studied in terms of their redox potentials and mass transport properties in electrochemical cells and AA-size Li/Li{sub x}MnO{sub 2} rechargeable cells employing 1M LiAsF{sub 6} in 50/50 volume percent propylene carbonate/ethylene carbonate (PC/EC) as the electrolyte. The chemical and electrochemical properties of these metallocene derivatives were also studied in terms of the chemical stability of the derivatives toward cell components and electrochemical reversibility in long-term cycling studies. It was found that adsorption of one derivative, dimethylaminomethylferrocene, on the Li{sub x}MnO{sub 2} electrode ({Delta}G{sub ads} = {minus}3.8 kcal mol{sup {minus}1} based on the Langmuir adsorption isotherm), blocked the intercalation of Li{sup +} ions in the Li{sub x}MnO{sub 2} electrode.
- OSTI ID:
- 5332886
- Journal Information:
- Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 139:1; ISSN JESOA; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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30 DIRECT ENERGY CONVERSION
300505 -- Fuel Cells-- Electrochemistry
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ALKALI METALS
ALKENES
CHALCOGENIDES
CHEMISTRY
COMPLEXES
DIENES
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
ELEMENTS
FABRICATION
FERROCENE
HYDROCARBONS
IRON COMPLEXES
LITHIUM
MANGANESE COMPOUNDS
MANGANESE OXIDES
MASS TRANSFER
METALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYENES
PROPYLENE
REDOX POTENTIAL
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS