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|Title:||Poly(vinylidene fluoride)-based, co-polymer separator electrolyte membranes for lithium-ion battery systems|
|Author(s):||Costa, C. M.|
Gomez Ribelles, J. L.
Appetecchi, G. B.
|Keywords:||Poly(vinylidene fluoride) copolymers|
Gel polymer electrolytes
Lithium battery applications
|Journal:||Journal of Power Sources|
|Citation:||Costa, C. M., Gomez Ribelles, J. L., Lanceros-Méndez, S., Appetecchi, G. B., & Scrosati, B. (2014). Poly (vinylidene fluoride)-based, co-polymer separator electrolyte membranes for lithium-ion battery systems. Journal of Power Sources, 245, 779-786.|
|Abstract(s):||In the present paper we report and discuss the physicochemical properties of novel electrolyte membranes, based on poly(vinylidenefluoride-co-trifluoroethylene), PVdF-TrFE, and poly(vinylidenefluorideco- hexafluoropropylene), PVdF-HFP, co-polymer hosts and the PVdF-TrFE/poly(ethylene oxide (PEO) blend as separators for lithium battery systems. The results have shown that the examined separator membranes, particularly those based on the PVdF co-polymers, are able to uptake large liquid amounts leading to high ionic conductivity values. Tests performed on Li/LiFePO4 and Li/SneC cells have revealed very good cycling performance even at high current rates and 100% of DOD, approaching the results achieved in liquid electrolytes. A capacity fading lower than 0.002% per cycle was observed. Particularly, the Li/LiFePO4 cathode cells have exhibited excellent rate capability, being still able to deliver at 2C above 89% of the capacity discharged at 0.1C. These results, in conjunction with the about 100% coulombic efficiency, suggest very good electrolyte/ electrode compatibility, which results from the high purity and stability of the electrolyte and electrode materials and the cell manufacturing.|
|Access:||Restricted access (UMinho)|
|Appears in Collections:||CDF - FCD - Artigos/Papers (with refereeing)|
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