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 detailed impedance spectroscopy study was carried out on poly(ethylene oxide) [P(EO)]-based polymer electrolyte samples with and without ceramic fillers.
Abstract: The addition of nanometric fillers (e.g., , ) to polymer electrolytes induces consistent improvement in the transport properties. The increase in conductivity and in the cation transference number is attributed to the enhancement of the degree of the amorphous phase in the polymer matrix, as well as to some acid‐base Lewis type, ceramic‐electrolyte interactions. This model is confirmed by results obtained from a detailed impedance spectroscopy study carried out on poly(ethylene oxide) [P(EO)]‐based polymer electrolyte samples with and without ceramic fillers. © 2000 The Electrochemical Society. All rights reserved.
389 citations
TL;DR: The first experimental evidence is provided to show that Li ions favor the pathway through the LLZO ceramic phase instead of the PEO-LLZO interface or PEO.
Abstract: Polymer-ceramic composite electrolytes are emerging as a promising solution to deliver high ionic conductivity, optimal mechanical properties, and good safety for developing high-performance all-solid-state rechargeable batteries. Composite electrolytes have been prepared with cubic-phase Li7 La3 Zr2 O12 (LLZO) garnet and polyethylene oxide (PEO) and employed in symmetric lithium battery cells. By combining selective isotope labeling and high-resolution solid-state Li NMR, we are able to track Li ion pathways within LLZO-PEO composite electrolytes by monitoring the replacement of (7) Li in the composite electrolyte by (6) Li from the (6) Li metal electrodes during battery cycling. We have provided the first experimental evidence to show that Li ions favor the pathway through the LLZO ceramic phase instead of the PEO-LLZO interface or PEO. This approach can be widely applied to study ion pathways in ionic conductors and to provide useful insights for developing composite materials for energy storage and harvesting.
383 citations
TL;DR: In this paper, the influence of the oxygen partial pressure during equilibration, PEqO2, is described in terms of a defect model for titanates, and a predominant ionic conductivity is concluded for a wide PEq O2 range (approximately 10−11 to 105 Pa).
Abstract: The grain bulk conductivity of acceptor-doped SrTiO3 ceramics was investigated by the impedance analysis method after quenching from high-temperature equilibria. The influence of the oxygen partial pressure during equilibration, PEqO2, is described in terms of a defect model for titanates. From a comparison between the experimental results and the predictions of this model, a predominant ionic conductivity is concluded for a wide PEqO2 range (approximately 10−11 to 105 Pa). The influence of the ionization energy of the acceptors and of possible defect association is discussed.
381 citations
TL;DR: In this paper, Li ionic conductivity of Czochralski−grown Li3N single crystals using electrochemical transport measurements is reported. But the results are not comparable with the best data reported for Li β−alumina single crystals.
Abstract: Lithium ionic conductivity of Czochralski‐grown Li3N single crystals using electrochemical transport measurements is reported. The highest Li ionic conductivity was found perpendicular to the hexagonal c axis, the anisotropy decreasing from two to one decade between 20 and 200 °C. Ambient Li ionic conductivity parallel to the Li2N planes of the layer structure was found to be σ=10−3 Ω−1 cm−1 with an activation energy of 0.25 eV. These values are comparable with the best data reported for Li β‐alumina single crystals.
377 citations
TL;DR: In this paper, the role of dopant-vacancy interactions in influencing the concentration of mobile vacancies is assessed for selected materials, and the results from atomistic lattice simulations lead to the following conclusions.
377 citations