Ionic conductivity of Dion-Jacobson type oxide LiLaTa2O7 and oxynitride LiLaTa2O6.15N0.57 measured by impedance spectroscopy

Kim, Young Il; Kim, Seungjoo

doi:10.1016/j.ceramint.2014.10.122

Cited by 12 publications

(5 citation statements)

References 33 publications

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“…AC conductivity analysis is a useful method to distinguish between different relaxation mechanisms and the factors contributing to dielectric properties. It has been widely used in ionic oxides , glasses , and ceramic systems etc. Different micro–elements such as grain, grain boundary and electrode with their dielectric/electrical contributions can be separated out through their frequency dependent response characteristics.…”

Section: Resultsmentioning

confidence: 99%

Physico-chemical and dielectric characterization of polypyrrole clay composite

Zidi¹,

Bekri-Abbes²,

Sdiri³

et al. 2015

Polym. Compos.

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In this study, we report on the chemical and dielectric properties of polypyrrole (PPy) clay composite. The in situ polymerization has been carried out in an aqueous solution using ammonium persulfate (APS) as oxidant. Molar ratio of Pyrrole (Py) to interlayer clay cation was fixed to 4 and that of APS to Py (R) was varied in the range of 0.25–4.00. It was shown that both the chemical and dielectric behaviors were affected by the variation of (R). XRD results showed an intercalated structure of PPy for a value of R corresponding to 0.25. Above this value, the basal distance (d001) was found to be around 1.3 nm, implying that PPy is essentially located at the surface of Montmorillonite (MMT). From FTIR spectroscopy, it was found that for R = 4, PPy was degraded, resulting in a decrease of the degree of polymerization and conductivity. For all samples the AC conductivity was found to be constant until 2 × 105 Hz but increased steeply above this value. The highest conductivity was found to be around 3.95 10−3 S.cm−1 for R = 1. The composite exhibited very large values of ε′ and ε″ at a low frequency, these values decreased with the increase of frequency. Curves of imaginary electric modulus (M″) exhibited a frequency peak due to the process of relaxation time of conductivity (τ = 6.9410−8 s) for R = 1. POLYM. COMPOS., 38:2043–2051, 2017. © 2015 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Physico-chemical and dielectric characterization of polypyrrole clay composite

Zidi¹,

Bekri-Abbes²,

Sdiri³

et al. 2015

Polym. Compos.

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“…The interlayer alkali ions of cesium (Cs + ) and rubidium (Rb + ) are easily exchanged by protons (H + ), which enables proton conduction of B10 À6 S cm À1 at 100-300 1C with activation energies of 0.68-0.72 eV. Leakage and proton conduction of CsBiNb 2 O 7 were reported by Goff et al 169 Lithium ionic conduction in Dion-Jacobson-type layered perovskites LiLaTa 2 O 7 and LiLaTa 2 O 6.15 N 0.57 were examined by Kim et al 165 The ionic conductivities of LiLaTa 2 O 7 and LiLaTa 2 O 6.15 N 0.57 are higher than that of the similar Ruddlesden-Popper phase Li 2 La 2/3 Ta 2 O 7 . In the Dion-Jacobson phases LiLaTa 2 O 7 and LiLaTa 2 O 6.15 N 0.57 , only half of the lithium sites are occupied, which encourages lithium ion hopping.…”

Section: Introduction Of Dion-jacobson Phasesmentioning

confidence: 97%

“…Material properties of Dion-Jacobson-type layered perovskites have not been studied as extensively as ABO 3 perovskites and their related compounds, although there have been reports on ferroelectricity, 162 proton conduction, 163,164 lithium-ion conduction, 165,166 sodium-ion conduction, 161,166 and mixed proton-electron conduction 167 in the Dion-Jacobson-type layered perovskites.…”

Section: Introduction Of Dion-jacobson Phasesmentioning

confidence: 99%

Recent developments in oxide ion conductors: focusing on Dion–Jacobson phases

Zhang

Yashima

2023

Chem. Commun.

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“…Thus, oxide-ion conduction can be expected in the Dion-Jacobson phases. Numerous studies have been conducted on the electrical properties of the Dion-Jacobson phases, such as ferroelectricity 43 , proton 44,45 , lithium-ion 46,47 , sodium-ion 47,48 , and mixed proton-electron conduction 49 . However, there are no reports on oxide-ion conduction in the Dion-Jacobson phases.…”

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confidence: 99%

Oxide-ion conduction in the Dion–Jacobson phase CsBi2Ti2NbO10−δ

et al. 2020

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Oxide-ion conductors have found applications in various electrochemical devices, such as solid-oxide fuel cells, gas sensors, and separation membranes. Dion-Jacobson phases are known for their rich magnetic and electrical properties; however, there have been no reports on oxide-ion conduction in this family of materials. Here, for the first time to the best of our knowledge, we show the observation of fast oxygen anionic conducting behavior in CsBi 2-Ti 2 NbO 10−δ. The bulk ionic conductivity of this Dion-Jacobson phase is 8.9 × 10 −2 S cm −1 at 1073 K, a level that is higher than that of the conventional yttria-stabilized zirconia. The oxygen ion transport is attributable to the large anisotropic thermal motions of oxygen atoms, the presence of oxygen vacancies, and the formation of oxide-ion conducting layers in the crystal structure. The present finding of high oxide-ion conductivity in rare-earth-free CsBi 2 Ti 2 NbO 10−δ suggests the potential of Dion-Jacobson phases as a platform to identify superior oxide-ion conductors.

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Ionic conductivity of Dion-Jacobson type oxide LiLaTa2O7 and oxynitride LiLaTa2O6.15N0.57 measured by impedance spectroscopy

Cited by 12 publications

References 33 publications

Physico-chemical and dielectric characterization of polypyrrole clay composite

Physico-chemical and dielectric characterization of polypyrrole clay composite

Recent developments in oxide ion conductors: focusing on Dion–Jacobson phases

Oxide-ion conduction in the Dion–Jacobson phase CsBi2Ti2NbO10−δ

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