Crystal structures and crystal chemistry in the system Na1+xZr2SixP3−xO12

Hong, Hawoong

doi:10.1016/0025-5408(76)90073-8

Cited by 1,288 publications

(427 citation statements)

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“…The diffusion coefficient was deduced from the impedance data. The diffusion coefficient for Li + inside the membrane was ten times higher than that for K + as expected from the litterature [ 1,2]. Impedance diagram analysis allows us to confirm the validity of Eisenman's model to describe the behavior of the NASICON/ solution interface in the presence of alkali-cations in agreement with the ion-exchange properties of NASICON membrane previously described.…”

Section: Kinetics Study Of the Nasicon/solution Interfacesupporting

confidence: 75%

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NASICON type ionic conductors for alkali ion sensing

Siebert

Fabry

1999

Ionics

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Abstract. NASICON type ionic conductors can be used as the sensitive membrane of alkali ion sensors. The main advantages compared to the classical glass electrodes are the better selectivity and lower impedance. The mechanism of response of this type of ionic sensors is presented. The sensitivity results from a direct ionic exchange between the ceramic electrolyte and the solution which has been characterized by impedance spectroscopy. The origin of the selectivity in the NASICON framework is discussed in terms of structural and ionic exchange properties. The performance characteristics of sodium and lithium ion sensing devices are presented. Examples of biomedical applications such as the measurement of sodium concentration in the crevicular fluid and the determination of lithium in artificial serum are described.

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Section: Kinetics Study Of the Nasicon/solution Interfacesupporting

confidence: 75%

“…The materials of NASICON type structure were first synthesized by Hong and Goodenough in 1976 [1,2]. These ceramic compounds were developed for their good cationic conductivity (typically 10 -4 to 10 -3 Scm -1 at room temperature).…”

Section: Introductionmentioning

confidence: 99%

NASICON type ionic conductors for alkali ion sensing

Siebert

Fabry

1999

Ionics

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“…Hong [1] and Goodenough et al [2] were the first to report on the existence of fast Na § ionic transport in the system Nal+~Zr2SixPa.xOl 2. The x values in these Na super ionic conductors, also known as NASICON, may vary in the range 0 < x < 3, yielding significantly different structure and properties.…”

Section: Introductionmentioning

confidence: 99%

Optimised NASICON ceramics for Na+ sensing

Fuentes

Figueiredo

Marques

et al. 2002

Ionics

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Abstract. NASICON dense ceramics were obtained from solid state reaction between SiO2, Na3PO4.12H20 and two different types of zirconia: monoclinic ZrO2 and the yttria-doped tetragonal phase (ZrO2)o.97(Y203)ao 3. Higher temperatures were needed to obtain dense samples of the yttrium free composition (1265 ~ The electrical conductivity, at room temperature, of the yttria-doped samples sintered at 1230 ~ (0.20 S/m) is significantly higher than the value obtained with the material prepared from pure ZrO2. The impedance spectra show that the differences in conductivity are predominantly due to the higher grain boundary resistance of the undoped ceramics, probably due to formation of monoclinic zirconia and glassy phases along the grain boundary. Further improvement of the electrical conductivity could be achieved after optimization of the grain size and density of grain boundaries. A maximum conductivity value of about 0.27 S/m at room temperature was obtained with the yttria-doped samples sintered at 1220 ~ for 40 h. Yttria-doped and undoped ceramics were tested as Na § potentiometric sensors. The detection limit of the yttriadoped sample (10 .4 mold) was one order of magnitude lower than the obtained with the undoped material.

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“…In the 1970ies, for the purpose of obtaining an isotropic structure, Goodenough & Hong designed the threedimensional network structure with a suitable tunnel size for Na + migration, and named the materials Na 1+x Zr 2 Si x P 3−x O 12 with 0 < x < 3 Na Super Ionic CONductor [2,142]. These Na + conductors exhibit comparably high conductivities (10 −3 − 10 −1 S/cm) at room temperature, which are in the range of liquid electrolytes [92].…”

Section: Methodsmentioning

confidence: 99%

Separators - Technology review: Ceramic based separators for secondary batteries

Nestler¹,

Schmid²,

Münchgesang³

et al. 2014

AIP Conference Proceedings

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Abstract. Besides a continuous increase of the worldwide use of electricity, the electric energy storage technology market is a growing sector. At the latest since the German energy transition ("Energiewende") was announced, technological solutions for the storage of renewable energy have been intensively studied. Storage technologies in various forms are commercially available. A widespread technology is the electrochemical cell. Here the cost per kWh, e. g. determined by energy density, production process and cycle life, is of main interest. Commonly, an electrochemical cell consists of an anode and a cathode that are separated by an ion permeable or ion conductive membranethe separator -as one of the main components. Many applications use polymeric separators whose pores are filled with liquid electrolyte, providing high power densities. However, problems arise from different failure mechanisms during cell operation, which can affect the integrity and functionality of these separators. In the case of excessive heating or mechanical damage, the polymeric separators become an incalculable security risk. Furthermore, the growth of metallic dendrites between the electrodes leads to unwanted short circuits. In order to minimize these risks, temperature stable and non-flammable ceramic particles can be added, forming so-called composite separators. Full ceramic separators, in turn, are currently commercially used only for high-temperature operation systems, due to their comparably low ion conductivity at room temperature. However, as security and lifetime demands increase, these materials turn into focus also for future room temperature applications. Hence, growing research effort is being spent on the improvement of the ion conductivity of these ceramic solid electrolyte materials, acting as separator and electrolyte at the same time. Starting with a short overview of available separator technologies and the separator market, this review focuses on ceramic-based separators. Two prominent examples, the lithium-ion and sodium-sulfur battery, are described to show the current stage of development. New routes are presented as promising technologies for safe and long-life electrochemical storage cells.

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Crystal structures and crystal chemistry in the system Na1+xZr2SixP3−xO12

Cited by 1,288 publications

References 5 publications

NASICON type ionic conductors for alkali ion sensing

NASICON type ionic conductors for alkali ion sensing

Optimised NASICON ceramics for Na+ sensing

Separators - Technology review: Ceramic based separators for secondary batteries

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