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Electrochemical investigation of Al-Li/LiFePO cells in oligo(ethylene glycol) dimethyl ether/LiPF.
- Source :
-
Journal of Applied Electrochemistry . Feb2011, Vol. 41 Issue 2, p241-247. 7p. 3 Charts, 4 Graphs. - Publication Year :
- 2011
-
Abstract
- 1 M LiPF dissolved in oligo(ethylene glycol) dimethyl ether with a molecular weight, 500 g mol (OEGDME500, 1 M LiPF), was investigated as an electrolyte in experimental Al-Li/LiFePO cells. More than 60 cycles were achieved using this electrolyte in a Li-ion cell with an Al-Li alloy as an anode sandwiched between two LiFePO electrodes (cathodes). Charging efficiencies of 96-100% and energy efficiencies of 86-89% were maintained during 60 cycles at low current densities. A theoretical investigation revealed that the specific energy can be increased up to 15% if conventional LiC anodes are replaced by Al-Li alloy electrodes. The specific energy and the energy density were calculated as a function of the active mass per electrode surface (charge density). The results reveal that for a charge density of 4 mAh cm about 160 mWh g can be reached with Al-Li/LiFePO batteries. Power limiting diffusion processes are discussed, and the power capability of Al-Li/LiFePO cells was experimentally evaluated using conventional electrolytes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0021891X
- Volume :
- 41
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Electrochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 57283001
- Full Text :
- https://doi.org/10.1007/s10800-010-0231-6