THE VIBRATIONAL SPECTROSCOPIC STUDY OF POLYACRYLONITRILE-BASED ELECTROLYTE

The existence of the interactions between the components in the system of the so-called mixed phase polymer electrolyte of polyacrylonitrile (PAN)-ethylene carbonate (EC)-LiClO4 has been studied by means of Ram an and IR spectroscopy. Evident experimental data indicate that the pl asticizer EC takes an important role in the polymer electrolyte system . By solving the lithium salt and the polymer, EC not only interacts w ith the Li+ ions through its C=O group, but also interacts with the po lymer by way of the dipole-dipole coupling of the C=O group of EC and the C=N group of PAN. Moreover, on plasticizing the polymer host in th e electrolyte, EC plays the part of a bridge between the lithium salt and the polymer, supplying a position on the C=N group of PAN for the Li+ ion to occupy.