کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1287610 | 973228 | 2006 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Study of multiple interactions in mesoporous composite PEO electrolytes Study of multiple interactions in mesoporous composite PEO electrolytes](/preview/png/1287610.png)
This paper discusses the FT-infrared (IR) and NMR spectroscopy results of a mesoporous silica (SBA-15) composite poly(ethylene oxide) (PEO) solid lithium polymer electrolyte. The changes in COC, CH, and ClO4 stretching IR vibrational modes indicated a combination of multiple interactions through Lewis acid–base reactions which interrupt the PEO crystalline structure. Higher salt disassociation by SBA-15 is also apparent from ClO4 vibrational band mode.NMR studies indicated three types of Li ion environments; the first one is Li ions within the conventional amorphous PEO, the second is Li ions on the surface of mesoporous SBA-15 and the third is Li ions trapped along with PEO in the nano-tubular channels of SBA-15. Annealing leads to interaction of more PEO and lithium ions with the SBA-15 and free ions for conduction, as reflected in the 7Li variable temperature (VT)-NMR measurements and variable temperature ion conductivity.
Journal: Journal of Power Sources - Volume 158, Issue 1, 14 July 2006, Pages 614–619