Determination of lithium transference number in PEO-DME-LiClO4 modified with alumina powders of various surface acidity |
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Authors: | Marcin Ciosek Maciej Siekierski W?adys?aw Wieczorek |
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Affiliation: | Warsaw University of Technology, Faculty of Chemistry, Noakowskiego 3 r. 346, 00-664 Warsaw, Poland |
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Abstract: | The effect of alumina additives bearing various surface groups on conductivity and lithium cation transference numbers in poly(ethylene oxide) dimethyl ether (PEO-DME)-LiClO4 electrolytes is examined. It is demonstrated that an increase in the conductivity and lithium transference number in composite electrolytes compared to pure PEO-DME-LiClO4 electrolyte is observed in the limited salt concentration range. Both quantities seem to depend mostly on ionic species mobility. Also, their salt concentration dependence resembles that of viscosity of electrolytes studied. The conduction mechanism is discussed on the basis of conductivity, transference numbers and ionic association studies. |
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Keywords: | Single ion conducting polymeric electrolytes Inert filler addition Conductivity Transference number |
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