▎ 摘　　要

Solid polymer electrolytes (SPE) are an important field of research. Creation of environmentally friendly SPEs is essential. In this article, broadband dielectric spectroscopy and small-angle neutron scattering (SANS) have been used to investigate chitosan-graphene-silver nitrate films. XRD analysis showed that the silver nanoparticle formation was favored when the concentration of graphene in the chitosan films was 5 and 10%. However, no XRD peaks were observed for silver particles as the graphene concentration increased to 20% and above. The FTIR analysis showed that the amine group of chitosan was affected due to presence of AgNO3 in the chitosan films. Dielectric analysis showed that the chitosan membranes became metacomposites as graphene concentration increased (10% and above).The dielectric loss increased with increasing graphene concentrations and was found to be maximum at 30% graphene concentration in the chitosan film. The conductivity increased from 1.43 x 10(-9) to 5.29 x 10(-4) S/Cm when 30% graphene is included in chitosan films. Also the dielectric characteristics were influenced by the presence of even small amounts (1 mM) of silver nitrate (AgNO3). The conductivity increased from 1.43 x 10(-9) to 1.24 x 10(-3) S/Cm when 30% graphene and 1 Mm AgNO3 were included in chitosan films. The dielectric characteristics such as loss tangent and electric modulus were also influenced by the presence of graphene and AgNO3 in the chitosan films. SANS analysis showed that graphene assembles as fractals in the chitosan films and that the incorporation of even small amount of AgNO3 (1 mM) influenced the assembly of graphene in the chitosan films.