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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Electrical conduction mechanism in NaCl complexed PEO/PVP polymer blend electrolytes
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Electrical conduction mechanism in NaCl complexed PEO/PVP polymer blend electrolytes

机译：NaCl复合PEO / PVP聚合物共混电解质的导电机理

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摘要

Sodium ion-conducting polymer blend electrolytes were prepared by dissolving NaCl salt in a polyethylene oxide-polyvinyl pyrrolidone (PEO-PVP) blend using solution cast technique. XRD and FTIR studies confirmed the complexation of the salt with polymer host which leads the reduction of its crystalline nature. FTIR spectra indicate the miscibility between PEO and PVP. Electrical conduction mechanism in the blend polymer complexes has been revealed by employing the complex impedance spectroscopy in the frequency range 1 Hz-1 MHz within the temperature range 303 K-343 K. The total conductivity, dielectric constant and electric modulus of the blend electrolytes are analyzed in order to explore the long range and short-range dynamics of ions. Ionic conductivity increased with the increase of salt concentration as well as temperature. The dielectric constant showed large value at lower frequencies and increased with temperature indicating polar nature of PEO and PVP of the blend. The electric modulus formalism reveals the non-Debye nature of the samples. The activation energies responsible for relaxation process measured from modulus spectra are found to be in good agreement with those obtained from dc conductivity studies.
机译：通过使用溶液流延技术将NaCl盐溶解在聚环氧乙烷-聚乙烯吡咯烷酮（PEO-PVP）混合物中来制备传导钠离子的聚合物混合物电解质。 XRD和FTIR研究证实了盐与聚合物主体的络合，导致其结晶性降低。 FTIR光谱表明PEO和PVP之间具有可混溶性。通过在303 K-343 K的温度范围内在1 Hz-1 MHz的频率范围内采用复阻抗谱，揭示了共混聚合物配合物中的导电机理。共混电解质的总电导率，介电常数和电模量为分析以探索离子的长距离和短距离动力学。离子电导率随盐浓度和温度的升高而增加。介电常数在较低频率下显示出较大的值，并且随温度升高而增加，表明共混物的PEO和PVP具有极性。电模量形式主义揭示了样品的非德拜性质。发现由模量谱测量的引起弛豫过程的活化能与从直流电导率研究获得的活化能非常一致。

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