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Composite polymer electrolytes based on mixing soft-segment waterborne polyurethane(WPU)and 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide(BMImTFSI)have been prepared and characterized.The addition of BMImTFSI results in an increase of the ionic conductivity.At high BMImTFSI concentration(BMImTFSI/WPU=3 in weight ratio),the ionic conductivity reaches 4.27×10~(-3)S/cm at 30℃.These composite polymer electrolytes exhibit good thermal and electrochemical stability,which are high enough to be applied in lithium batteries.
Composite polymer electrolytes based on mixing soft-segment waterborne polyurethane (WPU) and 1-butyl-3-methylimidazolium bis [(trifluoromethyl) sulfonyl] imide (BMImTFSI) have been prepared and characterized. The addition of BMImTFSI results in an increase of the ionic the BMImTFSI concentration (BMImTFSI / WPU = 3 in weight ratio), the ionic conductivity reaches 4.27 × 10 -3 S / cm at 30 ° C. These composite polymer electrolytes exhibit good thermal and electrochemical stability, which are high enough to be applied in lithium batteries.