Conductivity of Cu+2 ion-conducting glassy nanocomposites

• Ionic conductivity of CuI doped molybdate glass-nanocomposite.
• Coppermolybdate (CuMoO4) nanoparticles.
• Ac conductivity and power law model.
• Mobile ion concentration.
• Scaling of the conductivity spectra.

We have studied the ionic conductivity of CuI doped molybdate glass-nanocomposite systems. X-ray diffraction (XRD) and high-resolution transmission electron microscopic (HR-TEM) studies have been carried out to obtain the particle size and the distribution of coppermolybdate (CuMoO4) nanoparticles in glass matrix. We have investigated the electrical conductivity of these glass-nanocomposites in a wide frequency and temperature range. We have analyzed the ac conductivity data using a power law model. Dc conductivity and hopping frequency show thermally activated nature. The power law exponent is almost same for each composition. It has been observed that mobile ion concentration is slightly dependent upon composition, but independent of temperature. The scaling of the conductivity spectra shows temperature-independent electrical relaxation process.

(i) TEM micrograph, displaying the distribution of frozen CuMoO4 nanoparticles for x = 0.2; (j) SAED pattern for x = 0.2; (k) HR-TEM for x = 0.2 and (l) HR-TEM for x = 0.4.Figure optionsDownload as PowerPoint slide