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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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Journal ArticleDOI
28 Jan 2014-ACS Nano
TL;DR: It is demonstrated that combining anionic, redox-active Au25 clusters with imidazolium cations leads to a stable ionic liquid possessing both ionic and electronic conductivity.
Abstract: Ionic liquids are room-temperature molten salts that are increasingly used in electrochemical devices, such as batteries, fuel cells, and sensors, where their intrinsic ionic conductivity is exploited. Here we demonstrate that combining anionic, redox-active Au25 clusters with imidazolium cations leads to a stable ionic liquid possessing both ionic and electronic conductivity. The Au25 ionic liquid was found to act as a versatile matrix for amperometric enzyme biosensors toward the detection of glucose. Enzyme electrodes prepared by incorporating glucose oxidase in the Au25 ionic liquid show high electrocatalytic activity and substrate affinity. Au25 clusters in the electrode were found to act as effective redox mediators as well as electronic conductors determining the detection sensitivity. With the unique electrochemical properties and almost unlimited structural tunability, the ionic liquids of quantum-sized gold clusters may serve as versatile matrices for a variety of electrochemical biosensors.

128 citations

Journal ArticleDOI
TL;DR: In this article, fast ionic conductor Li0.33La0.557TiO3 (LLTO) nanowires with high ionic conductivity were prepared through electrospinning and subsequent high temperature calcination.

128 citations

Journal ArticleDOI
TL;DR: In this paper, the polyethylene oxide (PEO) based lithium ion conducting polymer electrolytes complexed with lithium trifluoromethanesulfonate (LiCF 3 SO 3 or LiTf) plasticized with an ionic liquid 1-ethyl 3-methyl imidazolium triflomeromethane sulfurate (EMITf) have been reported.

128 citations

Journal ArticleDOI
TL;DR: In this paper, a defect chemistry model is proposed for brownmillerite oxides with high oxygen ion conductivity, and its electrical conductivity and transport properties have been studied in detail.

128 citations

Journal ArticleDOI
TL;DR: In this article, the authors have synthesized highly conductive alkali-metal ionic conductors based on ionic crystals in which high concentrations of the charge carriers can be realized by doping (point defects in the cation substructure) and, on the other hand, the activation energy of the interchange of sites is decreased by translationally fixed but rotationally mobile complex anions.
Abstract: Transport phenomena in the solid state are of equal importance in basic research and practice. In the past two decades particular interest has been directed towards so-called “fast” or “super” ionic conductors because of their attractive potential applications. We have synthesized highly conductive alkali-metal ionic conductors based on ionic crystals in which, on the one hand, high concentrations of the charge carriers can be realized by doping (point defects in the cation substructure) and, on the other, the activation energy of the interchange of sites is decreased by translationally fixed but rotationally mobile complex anions. Mixed crystals with Na3PO4 or Na3AlF6 structures have proven especially suitable in this connection. With the object of establishing a broader experimental foundation for clarifying the controversially discussed question of whether the higher free transport volume or the rotational motion of the anions is responsible for the high cation mobility in these rotary phases we have systematically varied the type of anions and concentration of defects and monitored the resulting changes in conductivity. Although the macroscopical characteristics investigated are not suitable for explaining mechanisms in detail at the atomic level, the results afford clear support for the assumption of a “paddle wheel mechanism”; but also effects of the enlarged transport volume are not to be disputed. Both these effects enhancing the cationic conductivity are concomitantly operative in amounts varying from system to system; they cannot be totally separated from each other. Seen in this light, the alternative, “volume effect” or “paddle wheel mechanism,” is not as sharply defined as was previously discussed.

128 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20231,167
20222,073
20211,175
20201,117
20191,030
2018966