科研之友
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摘要
In the present work, we report a simple solid polymer electrolyte (SPE) system that is solely based on poly(vinylidene fluoride-co-hexafluoropropylene) [P(VdF-HFP)] and lithium trifluoromethanesulfonate (LiTf). The SPEs produced exhibit high ionic conductivity of similar to 10(-4) S cm(-1) at ambient temperature when 40 wt.% of LiTf is incorporated. There is an anomaly when moderate amount of LiTf is added into the polymer. This can be related to formation of neutral ion pairs, and substantiated by calculation of activation energy and scanning electron micrographs. TGA thermograms also show that all the samples tested are thermally stable up to 400 degrees C, even with the incorporation of LiTf. The highest ionic conducting sample achieves highest onset temperature of decomposition.
- 出版日期2013-1
