화학공학소재연구정보센터
Solid State Ionics, Vol.333, 38-44, 2019
Electrospun poly(vinylidene fluoride)/cellulose acetate/AgTiO2 nanofibers polymer electrolyte membrane for lithium ion battery
Polymer electrolyte membrane based on cellulose acetate/AgTiO2 seems propitious for lithium ion battery (LIB) separator due to its superior thermal stability and hydrophilic property. Herein, we report the preparation of novel electrospun poly(vinylidine fluoride)/cellulose acetate/AgTiO2 hybrid nanofibers polymer electrolyte membrane by electrospinning for LIB application. For the preparation of PVdF/CA-AgTiO2 nanofibers membrane, silver doped titania (Ag-TiO2) nanoparticles were incorporated in electrospinning solution of poly(vinylidine fluoride) (PVdF)/cellulose acetate (CA). The PVdF/CA-AgTiO2 nanofibers membrane was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infra-red spectroscopy (FTIR), thermogravimetry (TG) and differential scanning calorimetry (DSC) analyses. PVdF/CA-AgTiO2 nano fibers membrane shows excellent thermal stability, high porosity and super electrolyte compatibility. The prepared cell LiFePO4/PVdF/CA-Ag-TiO2/Li delivered excellent cyclic stability with high discharge capacity and coulombic efficiency of 100% after 50 cycles at 0.1C. High ionic conductivity and good overall electrochemical performances enlightens the approach of making hybrid organic cellulose-based composite polymer electrolyte membrane is promising candidate for lithium ion battery.