Within the frequency range 10... 10<^>6 Hz, the influence of Cu6PS5I nanoparticles on the dielectric properties of planar oriented liquid crystal 6CHBT has been studied. It has been shown that nanoparticles lead to an increase in conductivity, but the conductivity dependence on concentration is non-monotonic function. It has been suggested that the reason of non-monotonic dependence of conductivity of 6CHBT on the concentration of nanoparticles is significant influence of ion adsorption on the nanoparticle surface and increase in the viscosity of liquid crystal when introducing nanoparticles.