Ionic Conductivity of Anion Receptor Grafted Siloxane Polymers for Solid Polymer Electrolytes |
Won-Sil Lee, Dong-Wook Kim, Chang-In Lee, Seong-Ihl Woo, Yong-Ku Kang |
Advanced Materials Division, Korea Research Institute of Chemical Technology;Advanced Materials Division, Korea Research Institute of Chemical Technology;Advanced Materials Division, Korea Research Institute of Chemical Technology;Department of Chemical and Biomolecular Engineering & WCU Energy Science and Engineering, Korea Advanced Institute of Science and Technology;Advanced Materials Division, Korea Research Institute of Chemical Technology; |
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Abstract |
We have prepared siloxane polymers grafted with trifluoromethane-sulfonylamide and oligoether side chains for solid polymer electrolytes with enhanced ionic conductivity. The grafted trifluoromethane sulfonylamide groups seem to be effective as an anion recepting site to enhance the ionic conductivity of the solid polymer electrolyte. The anion receptor grafted siloxane polymers showed one order of magnitude higher ionic conductivity than the siloxane polymers without anion receptor grafts. The fitting parameter A of the VTF plot which was related to the carrier density of the electrolyte increased with increasing the number of grafted anion receptor. The results of experiment indicate that the anion-complexing site of the anion receptor grafted polymer host effectively traps the anions. The anion receptor grafted polymer was found to be a promising material for lithium polymer batteries. |
Key Words:
Lithium ion polymer battery, Anion receptor, Solid polymer electrolyte, Ionic conductivity |
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