کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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821224 | 906748 | 2010 | 6 صفحه PDF | دانلود رایگان |
The electrical conductivity of polyethersulphone (PES) insulating polymer was improved by incorporation of electrically conductive graphite and ions. An initial conducting pathway of the PES/graphite composites was formed at lower than 3 wt.% of the filler content. LiCl was found to be an effective dopant for the improvement of the electrical conductivities of the PES/graphite composites. By doping with 0.06 wt.% of LiCl the electrical conductivity was enhanced by two orders of magnitude. The enhancement resulted from intercalation of Li+ ions into interlayer spaces of the graphite. Upon intercalation, an acceptor GIC, Li-GIC, was consequently formed. The stability of the improved electrical conductivities of the composites contributed with doped-ions was assessed. The electrical conductivity of both un-doped and doped graphite/PES composites slightly increased with increasing temperature and slightly decreased by physical ageing. The enhancement of the electrical conductivities by doping ions was stable at the high temperatures.
Journal: Composites Science and Technology - Volume 70, Issue 10, 30 September 2010, Pages 1544–1549