Of Polymer-in-salt-type Polymer Solid Electrolyte Synthesis And Application Of Research

In this work we have synthesized several novel ionic liquids (ILs) based on imidazolium/pyrrolidinium cations and maleate / phthalate anions. The viscosity, conductivity, electrochemical stability, and thermal stability of these ILs have been investigated systemically in this work. The conductivities and viscosities of these ILs were measured at different temperatures. The conductivities of imidazolium cation-based ILs are slightly higher than that of pyrrolidinium cation-based ILs and the conductivities of maleate anion-based ILs are higher than that of corresponding phthalate anion-based ILs. The temperature dependence of viscosity and conductivity was discussed in this study. The Vogel-Tammann-Fulcher (VTF) equation accurately describes the dependence of both of the conductivity and viscosity on temperature. Moreover, the thermal degradation of ILs was evaluated by thermogravimetric analysis (TGA), which indicated these ILs behave good thermal stability except for N-methylpyrrolidinium based-ILs. The electrochemical window values of ILs range from 2.4V to 4.4V.Four ILs based on 1-ethyl-3-methylimidazolium and N, N-dimethypyrrolidinium cations and maleate / phthalate anions were chosen as the adulterants of solid polymer electrolyte (SPE). The dependence of the properties of SPE on the type of ILs was mainly discussed in this work. The conductivities of SPE were measured by ac impedance measurement at different temperatures. Similar to the ILs cases, the VTF equation accurately describes the dependence of the conductivity of SPE on temperature. The interaction between ILs and polymer basis was investigated by infrared spectra (IR) and X-ray Diffraction (XRD) which suggested a possible mechanism for the influence of ILs on the ionic conductivity of SPE. The electrochemical windows of the SPE largely depend on the content of ILs. Moreover the sparking voltage values of the SPE range from 100V to 250V.In order to improve the conductivity of SPE, gamma-butyrolactone and glycol was used as the plasticizers of SPE. The new systems show high conductivity (up to 5.2m S^-1 at 30℃). Additionally the unique properties of the new systems meet exactly with the requirements of long life aluminum electrolytic capacitors.