Sol–gel synthesis of NASICON discs from aqueous solution

Azuma, Yasunori; Michishita, Satoko

doi:10.1039/a608364a

Cited by 45 publications

(24 citation statements)

References 11 publications

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“…Throughout this experiment, the NASICON thick film that was sintered at 1000 • C was used for the CO 2 gas sensor. The findings of the experiment are consistent with the experimental results reported by Shimizu et al [11] and Miyachi et al [12].…”

Section: Microstructure and Crystallization Of The Resulting Materialssupporting

confidence: 83%

Characteristics of thick-film CO2 sensors based on NASICON with Na2CO3-CaCO3 auxiliary phases

et al. 2006

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Potentiometric CO 2 sensors were fabricated using a NASICON (Na 1+x Zr 2 Si x P 3−x O 12 ) thick film and auxiliary layers. The powder of a precursor of NASICON with high purity was synthesized using the sol-gel method. Using the NASICON paste, an electrolyte was prepared on the alumina substrate through screen printing and then sintered at 1000 • C for 4 h. In the present study, as new auxiliary phases, a series of Na 2 CO 3 -CaCO 3 system was deposited on the Pt sensing electrode. The electromotive force (EMF) values were found to be linearly dependent on the logarithm of the CO 2 concentration in the range of 1000-10000 ppm. The device to which Na 2 CO 3 -CaCO 3 (1:2) was attached showed good sensing properties at low temperatures.

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Section: Microstructure and Crystallization Of The Resulting Materialssupporting

confidence: 83%

Characteristics of thick-film CO2 sensors based on NASICON with Na2CO3-CaCO3 auxiliary phases

et al. 2006

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“…Precursor powders with nominal composition Na 3 Zr 2 Si 2 PO 12 were prepared by a sol-gel technique described by Shimizu et al [7] High purity reagents (Aldrich) were used without further purification: 0.69 g NH 4 H 2 PO 4 , 4.5 g ZrO(NO 3 ) 2 · 8H 2 O and an excess of 1.46 g Na 2 SiO 3 were dissolved in water and stirred at room temperature for 2 hours. The pH was then adjusted to 3 by adding HNO 3 and the solution heated to 60 • C for 3 hours.…”

Section: Sol-gel Synthesismentioning

confidence: 99%

“…Sol-gel techniques [6,7] have been investigated to improve phase purity and sinter ability. [8] However, obtaining dense, fine-grained NASICON is impossible with any of the reported processing methods.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Electrical Properties of Dense Ceramics with NASICON Composition Sintered at Reduced Temperatures

Schäf¹,

Weibel²,

Llewellyn³

et al. 2004

J Electroceram

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A reduced temperature route is explored for the preparation of ceramics with NASICON composition. The procedure includes sol-gel synthesis, Sample Controlled Thermal Analysis of the precursor powders and hotpressing the powders under 0.3 GPa and at temperatures between 600 and 900 • C. It is shown that ceramics with densities around 90% can be obtained by this route. Electrical conductivity values and activation energies are determined and discussed.

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“…Stoichiometric mixed powders are treated with established ceramic techniques (pressing, sintering) and processed to molded paddings [143,[172][173][174]. A sinter temperature of 1200°C is applied, which leads to a specific conductivity of up to 1 · 10 −2 S/cm at ambient conditions [175][176][177], thus allowing the development of low-temperature sodium-sulfur batteries [165].…”

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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Sol–gel synthesis of NASICON discs from aqueous solution

Cited by 45 publications

References 11 publications

Characteristics of thick-film CO2 sensors based on NASICON with Na2CO3-CaCO3 auxiliary phases

Characteristics of thick-film CO2 sensors based on NASICON with Na2CO3-CaCO3 auxiliary phases

Preparation and Electrical Properties of Dense Ceramics with NASICON Composition Sintered at Reduced Temperatures

Separators - Technology review: Ceramic based separators for secondary batteries

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