Characterization of solvent-free polymer electrolytes consisting of ternary PEO-LiTFSI-PYR14 TFSI
2006 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 153, no 9, A1649-A1654 p.Article in journal (Refereed) Published
The physical properties and electrochemical performance of solvent-free polymer electrolytes, consisting of poly(ethylene oxide) [P(EO)] with Li+'>Li + Li+ and N'>N N -butyl-N'>N N -methylpyrrolidinium (PYR14+)'>(PYR + 14 ) (PYR14+) salts of bis(trifluoromethanesulfonyl)imide (TFSI), are reported. The addition of the PYR14TFSI'>PYR 14 TFSI PYR14TFSI room-temperature molten salt to the conventional P(EO)10LiTFSI'>P(EO) 10 LiTFSI P(EO)10LiTFSI polymer electrolyte results in a significant enhancement of the ionic conductivity (to 2.6×10−4S∕cm'>2.6×10 −4 S/cm 2.6×10−4S∕cm at 20°C'>20°C 20°C ). Limetal∕LiFePO4'>Limetal∕LiFePO 4 Limetal∕LiFePO4 batteries making use of this new family of solid polymer electrolytes have shown a very promising low-temperature cycle life. It was found that a Limetal∕LiFePO4'>Limetal∕LiFePO 4 Limetal∕LiFePO4 cell at 20°C'>20°C 20°C can deliver 138mAh∕g'>138mAh∕g 138mAh∕g during the first discharge, corresponding to 90% of the nominal specific capacity (154mAh∕g)'>(154mAh∕g) (154mAh∕g) , and a promisingly low capacity fading of about 0.2%/cycle over 500 cycles.
Place, publisher, year, edition, pages
Pennington: Electrochemical Society, 2006. Vol. 153, no 9, A1649-A1654 p.
polymer electrolytes, ionic conductivity, solid electrolytes, secondary cells
IdentifiersURN: urn:nbn:se:umu:diva-19415DOI: 10.1149/1.2211928ISI: 000239250600004OAI: oai:DiVA.org:umu-19415DiVA: diva2:201780