TY - JOUR KW - Ftir KW - Thin films KW - Polyethylene oxide KW - Lithium trifluoromethanesulfonimide AU - Shi-Jie Wen AU - Thomas J Richardson AU - Dania I Ghantous AU - Kathryn A Striebel AU - Philip N Ross AU - Elton J Cairns AB -

FTIR transmission spectra of thin films of polyethylene oxide (PEO) + lithium trifluoromethanesulfonimide (LiN(CF3SO2)2, LiTFSI) mixtures have been obtained for ethylene oxideLi ratios from 64:1 to 2:1. The phase information from these spectra is compared with the reported phase diagrams based on thermal measurements. The infrared spectrum of LiTFSI is assigned by analogy with those of related compounds. Using the spectral subtraction technique, the effects of Li+ solvation on the PEO matrix and of ion pairing and aggregate formation on the TFSI anion are revealed. An explanation is offered for the variation in ionic conductivity for compositions within the “crystallinity gap”.

BT - Journal of Electroanalytical Chemistry DA - 05/1996 DO - 10.1016/0022-0728(96)04536-6 IS - 1-2 N2 -

FTIR transmission spectra of thin films of polyethylene oxide (PEO) + lithium trifluoromethanesulfonimide (LiN(CF3SO2)2, LiTFSI) mixtures have been obtained for ethylene oxideLi ratios from 64:1 to 2:1. The phase information from these spectra is compared with the reported phase diagrams based on thermal measurements. The infrared spectrum of LiTFSI is assigned by analogy with those of related compounds. Using the spectral subtraction technique, the effects of Li+ solvation on the PEO matrix and of ion pairing and aggregate formation on the TFSI anion are revealed. An explanation is offered for the variation in ionic conductivity for compositions within the “crystallinity gap”.

PY - 1996 SP - 113 EP - 118 ST - Journal of Electroanalytical Chemistry T2 - Journal of Electroanalytical Chemistry TI - FTIR characterization of PEO + LiN(CF3SO2)2 electrolytes VL - 408 SN - 15726657 ER -