期刊
JOURNAL OF POWER SOURCES
卷 195, 期 18, 页码 6130-6137出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2009.10.079
关键词
Polymer electrolyte; Lithium batteries; Ionic liquid; PEO; LiTESI; UV cross-linking
In this manuscript is reported an attempt to prepare high ionic conductivity lithium polymer electrolytes by UV cross-linking the poly(ethyleneoxide) (briefly called PEO) polymer matrix in presence of the plasticizing lithium salt, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and an ionic liquid of the pyrrolidinium family (N-alkyl-N-methylpyrrolidinium TFSI) having a common anion with the lithium salt. It is demonstrated that polymer electrolytes with room temperature ionic conductivities of nearly 10(-3) S cm(-1) could be obtained as a result of the reduced crystallinity of the ternary electrolytes. The results clearly indicate that the cross-linked ternary electrolyte shows superior mechanical properties with respect to the non-cross-linked electrolytes and higher conductivities with respect to polymer electrolytes containing none or less ionic liquid. (C) 2009 Elsevier B.V. All rights reserved.
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