Ion Transport in Swift Heavy Ion Irradiated P(VdF-HFP)-(MMT-PAni) Nanocomposite Polymer Electrolytes

摘要

In the present work, Polyaniline (PAni) nanofibers have been grown inside the interlayer galleries of montmorillonite (MMT) clay platelets to create hybrid 3D nanofillers and dispersed in P(VdF-HFP)-BMIMBr based polymer electrolytes with a view to utilize favorable properties of both ionic liquid (BMIMBr) and hybrid nanofiller (MMT-PAni nanocomposite). Different properties viz. ionic conductivity, thermal and electrochemical stability of the nanocomposite polymer electrolytes have been investigated varying the concentration of MMT-PAni nanocomposite as 1.5, 2.5, 5, 7.5 and 10 wt. %. Scaling of AC conductivity has been done considering the changes in ion concentration and ion diffusion length with changing nanofiller concentration. The various properties of P(VdF-HFP)-BMIMBr nanocomposite polymer electrolyte dispersed with MMT-PAni nanocomposite have been reported. The nanocomposite polymer electrolyte showing the best properties has been irradiated with 100 MeV Si~(9+) ions with four different fluences of 5xl0~(10), 1x10~(11), 5x10~(11) and lx10~(12) ions cm~(-2). Swift heavy ion irradiation has been used as a tool to exfoliate the MMT layers so that PAni nanofibers and MMT layers get dispersed in the polymer matrix. SHI irradiation enhances various physico-chemical and electrochemical properties of the nanocomposite polymer electrolyte system dispersed with MMT-PAni nanocomposite. The fluence dependent enhancement in different properties of 100 MeV Si~(9+) ion irradiated nanocomposite polymer electrolytes have been discussed in detail.