Abstract
A series of Composite polymer electrolytes were prepared by blending a novel hyperbranched polyether (PHEMO) with different amount of poly(vinylidene fluoride-hexa fluoroproylene) (PVDF-HFP), The thermal stabilities and ionic conductivities of the as-prepared electrolytes were investigated by means of differential scanning calorimetric (DSC), thermogravimetric analysis (TGA) and alternating current impendence. The test results displayed that both the adding amount of PVDF-HFP and testing temperature had effect on ionic conductivities of the polymer electrolytes. When the mass ratio of PHEMO to PVDF-HFP was 2:1, the composites possessed excellent electrochemical and thermal stability, and the ion conductivity was 3.04 × 10-5 S/cm at room temperature. TGA results showed that the composites had better thermal stability and they were benefit for the safety of lithium ion batteries.
Original language | English |
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Pages (from-to) | 40-43 |
Number of pages | 4 |
Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
Volume | 27 |
Issue number | SUPPL. 2 |
Publication status | Published - Dec 2007 |
Keywords
- Hyperbranched polyether
- Ionic conductivity
- Lithium-ion battery
- PVDF-HFP
- Polymer electrolyte