Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 128, Issue 1-2, Pages 250-255Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2011.03.007
Keywords
Polymers; Thin film; X-ray diffraction; Thermal properties
Categories
Funding
- National Basic Research Program of China (863 Program) [2009AA11A105]
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Polyethylene oxide (PEO) based solid state electrolytes have been thought as promising electrolytes to replace the organic liquid electrolyte for lithium ion batteries. But the lower ionic conductivities at room temperature restrict their application. In this paper, functional ionic liquid and polymer mixed electrolytes are prepared from N-methyoxymethyl-N-methylpiperidinium bis(trifluoromethanesulfonyl) imide (PP1.1O1TFSI) and polyethylene oxide. The PP1.1O1TFSI, a kind of room-temperature molten salt, was added to the conventional P(EO)(20)LiTFSI polymer electrolyte and resulted in a significant improvement of the ionic conductivity at room temperature. LiFePO4/Li and Li4Ti5O12/Li cells using this kind of electrolyte show high reversible capacity and stable cycle performance. (C) 2011 Elsevier B.V. All rights reserved.
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