Structural and electrical properties of CdS nanocomposite solid films for electrolyte applications

Solid Polymer electrolyte-based energy devices are playing a vital role for future energy sources. Solid state Poly (ethylene Oxide) polymer electrolyte was prepared by incorporating CdS nanoparticles. The precursor Cd(NO3)2 was incorporated in the host polymer to form a film and H2S gas was exposed on the film to convert it into CdS. The host polymer itself acted as a capping agent to reduce the size of CdS nanoparticles. The size distribution of CdS particles inside the matrix and the surface property were studied using Transmission Electron Microscope (TEM) and Atomic force microscope (AFM). The functional group present in the composites had been analyzed using Fourier Transform spectroscopy (FTIR). The electrical characteristics of the polymer nano composite electrolyte were characterized using impedance analyzer. The increase in ionic conductivity by varying the ratio of CdS:PEO was observed from the electrical studies.