论文部分内容阅读
Poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)based composite polymer electrolyte(CPE)modified with CeO2,La2O3 and Y2O3 nano-rare earth oxides was prepared by phase inversion technique.Physical and chemical properties of the modified CPEs were studied by SEM,TG-DSC and electrochemical methods.The results show that the CPE modified with 10% La2O3(mass fraction)has the best practical applicability,which indicates that the thermal and electrochemical stability can reach over 400°C and 4.5V,respectively,and temperature dependence of ionic conductivity follows Vogel-Tamman-Fulcher(VTF)relationship and ionic conductivity at room temperature is up to 3.3mS/cm.The interfacial resistance R i reaches a stable value about 557Ω after 6d storage.
Polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) based composite polymer electrolyte (CPE) modified with CeO2, La2O3 and Y2O3 nano-rare earth oxides was prepared by phase inversion technique. Physical and chemical properties of the modified CPEs were studied by SEM, TG-DSC and electrochemical methods. The results show that the CPE modified with 10% La2O3 (mass fraction) has the best practical applicability, which indicates that the thermal and electrochemical stability can reach over 400 ° C and 4.5V, respectively , and temperature dependence of ionic conductivity following Vogel-Tamman-Fulcher (VTF) relationship and ionic conductivity at room temperature is up to 3.3 mS / cm. The interfacial resistance R i reaches a stable value about 557Ω after 6d storage.