Topic
Ionic conductivity
About: Ionic conductivity is a research topic. Over the lifetime, 19412 publications have been published within this topic receiving 519167 citations.
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TL;DR: In this article, a mixed electronic-oxide ionic conductivity in LaGaO 3 -based oxide doped with Fe, Co or Ni was investigated and it was shown that the electric conductivity was greatly increased by doping Fe and Co for the Ga site of La 0.8 Sr 0.2 Ga 0.6 Fe 0.4 O 3.
167 citations
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TL;DR: In this article, the authors reported the results of a study on CSZ (ZrO 2 ǫ+8.7 µm)/Al 2 O 3 multilayer systems, representing a system with incoherent interfaces as shown by HRTEM.
167 citations
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TL;DR: In this article, a microporous polymer electrolyte based on poly(vinylidene fluoride) and poly(ethylene oxide) (PVDF-PEO) blends was prepared by a simple phase inversion technique, in which the addition of PEO can obviously improve the pore configuration.
167 citations
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TL;DR: It is shown by FTIR, TGA that IL partly complexes with the polymer PVdF-HFP and partly remains dispersed in the matrix, and the variation of ionic conductivity with temperature of these gel polymeric membranes follows Arrhenius type thermally activated behavior.
Abstract: PVdF-HFP + IL(1-butyl-3-methylimidazolium tetrafluoroborate; [BMIM][BF4]) polymeric gel membranes containing different amounts of ionic liquid have been synthesized and characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared (FTIR), differential scanning calorimetry, thermogravimetric analysis (TGA), and complex impedance spectroscopic techniques. Incorporation of IL in PVdF-HFP polymer changes different physicochemical properties such as melting temperature (Tm), thermal stability, structural morphology, amorphicity, and ionic transport. It is shown by FTIR, TGA (also first derivative of TGA, “DTGA”) that IL partly complexes with the polymer PVdF-HFP and partly remains dispersed in the matrix. The ionic conductivity of polymeric gel membranes has been found to increase with increasing concentration of IL and attains a maximum value of 1.6 × 10–2 S·cm–1 for polymer gel membrane containing 90 wt % IL at room temperature. Interestingly, the values of conductivity of memb...
167 citations
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TL;DR: An electrochemical impedance spectroscopy (EIS) study of three members of the family of compounds LixNi1-yCoyO2 (y = 0, 0.2, and 1) has been performed by taking spectra at closely spaced bias potentials over the potential windows of utilization as cathodes in lithium-ion batteries.
Abstract: An electrochemical impedance spectroscopy (EIS) study of three members of the family of compounds LixNi1-yCoyO2 (y = 0, 0.2, and 1) has been performed by taking spectra at closely spaced bias potentials over the potential windows of utilization as cathodes in lithium-ion batteries. The spectra have been interpreted in terms of electronic and ionic transport properties. It has been found that, for x values greater than about 0.9, all the compounds show semiconductive properties with a specific resistance that increases with decreasing Ni content. For x close to about 0.9−0.8, the properties change into those of a metal-like material in which the ionic conductivity becomes the limiting factor. The transition between these two limiting conditions clearly appears in the impedance spectra.
167 citations