Lithium ions conduction in Li2xMn1-xPS3 films

Li2xMn1-xPS3 films have been synthesized by exfoliating MnPS3 through the successive intercalations of K+ and Li+ ions. Their dielectric response has been measured from 80 to 350K in the frequency range of (10(2)-10(6)) Hz. The obtained data have been analyzed in terms of both complex permittivity epsilon* and the ac conductivity sigma(ac). The frequency dependence of sigma(ac) has been interpreted in terms of the Jonscher's law, whose exponent n decreases by increasing temperature. The n values lie between 0.479 and 0.501 and are typical of materials in which the ac conductivity is due to multiple hops of carriers. By analyzing the sigma(dc) temperature dependence, the observed dielectric response has been attributed to the intercalated lithium ions, and the Li2xMn1-xPS3 films have been classified as hopping charge carrier systems.