ChemInform Abstract: STUDY OF A BETA‐ALUMINA ELECTROLYTE FOR SODIUM‐SULFUR BATTERY

Fally, J.; Lasne, C; Lazennec, Y.; Cars, Y. Le; Margotin, P.

doi:10.1002/chin.197351029

Cited by 3 publications

(4 citation statements)

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“…The present publication considers Key words: sodium-sulfur cells, beta-alumina, high-temperature cells, beta-alumina aging, effect of irapurities. 734 the latter effect on lifetime of the ceramic under electrochemical conditions and represents an updating of work previously described (2,3).…”

Section: Lifetime Of Fl-alumina Electrolytementioning

confidence: 90%

“…The solid electrolyte membranes used were a pure t~-alumina of two-block composition containing no additives or stabilizers (3,4), in the form of closed-end tubes 45 mm long and 8 mm external diameter, and wall thickness 0.6 ram. The reservoirs were constructed of Sovirel 1 S 74701 glass.…”

Section: Methodsmentioning

confidence: 99%

“…In an earlier paper (2) we demonstrated that magnesia additives used as stabilizers for certain ~-alumina compositions had a detrimental influence on electrolyte lifetime in sodium-sulfur experimental cells. At the same time, it was shown that impurities present in the reactants could enter the p-alumina lattice during electrochemical cycling (2,3). Because of this knowledge of impurities, work carried out in this laboratory has concentrated on two aspects of the aging problem, namely (i) the effect of the initial purity of the palumina used; (ii) the effect of introduction of impurities into the lattice of pure E-alumina during electrochemical cycling.…”

Section: Lifetime Of Fl-alumina Electrolytementioning

confidence: 99%

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Factors Influencing the Lifetime of Pure Beta‐Alumina Electrolyte

Lazennec

Lasne

Margotin

et al. 1975

J. Electrochem. Soc.

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The influence of some impurities on the aging and the lifetime of sodiumsulfur and sodium-sodium experimental cells is studied. The aging mechanism involves an ion exchange between impurities of the reactants and the sodium ions of the E-alumina lattice. In particular, introduction of potassium changes lattice parameters of ;~-alumina and Na* mobility. An important conclusion of this work is that pure E-alumina does allow the transfer of large amounts of total charge (i.e., of sodium ions) before failure. The present figures are in excess of 1700 A-hr/cm 2. These results have enabled the authors to construct Na-S cells which have given in excess of 4,000 cycles or 16,000 hr of continuous operation.The sodium-sulfur battery, based on the sodium ;~alumina electrolyte, was first described by Weber and Kummer (1) and is to date the most promising hightemperature, high-energy density battery. The reasons for this developmental success depend on the use of the solid sodium-conducting E-alumina between the molten sodium anode and molten sulfide-polysulfide electrolyte in contact with the sulfur cathode. This solves immediately the self-discharge and constructional problems involving the use of matrix or pastes to retain molten components (either liquid alkali, metal, or molten salt electrolyte) in all-liquid hightemperature systems (2). Development of the system so that a wide range of practical applications will result requires the solution of two major difficulties, both economic. The first is clearly one of initial investment cost per kW-hr of capacity or kW of power. This depends on many factors, the most important being:(i) The cost of the E-alumina used, which depends not only on precise conditions of manufacture and sintering, but also on the purity of the a-alumina used.(ii) The cost of the current collector material at the sulfur electrode (graphite or carbon felt).(iii) The total cost of manufacture, which depends on the development of efficient sealing techniques.The second factor is battery lifetime. Economic considerations dictate that a minimum lifetime of 2-3 years should be aimed at for urban electric vehicles, and of about 5 years for urban mass transit (buses). On ~he off-peak power storage application, for which the sodium-sulfur system seems eminently suitable provided that its cost-lifetime ratio is sufficiently low, a lifetime at the order of 10 years should be aimed at.In the present paper, some factors influencing cell lifetime will be discussed.

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Section: Lifetime Of Fl-alumina Electrolytementioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Lifetime Of Fl-alumina Electrolytementioning

confidence: 99%

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Factors Influencing the Lifetime of Pure Beta‐Alumina Electrolyte

Lazennec

Lasne

Margotin

et al. 1975

J. Electrochem. Soc.

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“…3 shows the XRD patterns of the powders doped with different amounts of SiO2 that were calcined at 1200 °C for 2 h. The Na + -β phase has the theoretical fomula Na2O•11Al2O3, or NaAl11O17 [23], and the β"phase has the formula Na2O•5Al2O3, or NaAl5O8 [24]. According to Na2O-Al2O3 phase diagram proposed by Fally et al [25], the β + β"-phases coexist in a region corresponding to the formula Na2O•nAl2O3(5.33 ≤ n ≤ 8.5). The XRD patterns of all calcined powders conform to the crystalline phase of NaAl5O8 (JCPDS 31-1262) and NaAl11O17 (JCPDS .…”

Section: Methodsmentioning

confidence: 99%

The Influences of Sio2 on the Sintering Behavior and the Properties of Na+- Β/Β"-Al2O3 Solid Electrolyte

Lee

Lim

2019

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SiO2-doped Na+-β/β″-Al2O3 was synthesized via a solid-state reaction, and the relationship between the SiO2 content and properties of Na+-β/β″-Al2O3 was investigated. Respective specimens were doped with 0 – 5 wt.% SiO2 as a liquid phase sintering promotor and sintered. The specimens were characterized by XRD, SEM, densimeter and impedance analyzer. In the sintered samples, the phase fraction of β″-Al2O3 decreased as the SiO2 content increased, whereas the relative sintered density was enhanced with the inclusion of less than 0.7 wt.% SiO2. The relative sintered density of Na+- β/β″-Al2O3 sintered specimen with 0.7 wt.% SiO2 doping reached 99.2 % of the theoretical density and the sintered density decreased when the amount of SiO2 was larger than 1 wt.% result from excessive liquid-phase formation during sintering. Similarly, the ionic conductivity of SiO2-doped Na+-β/β″-Al2O3 was enhanced by doping with a small amount of SiO2, whereas the addition of more than 1 wt.% SiO2 negatively affected the ionic conductivity of Na+-β/β″-Al2O3 due to a decrease in the sintered density and unfavorable phase relationship. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.14246

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Li–S and Li–O2 Batteries with High Specific Energy

Zhang

2016

SpringerBriefs in Molecular Science

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ChemInform Abstract: STUDY OF A BETA‐ALUMINA ELECTROLYTE FOR SODIUM‐SULFUR BATTERY

Abstract: Die Struktureigenschaften von Na‐aluminaten mit β‐Al2O3‐ Struktur als Ionenleiter werden untersucht.

Cited by 3 publications

References 1 publication

Factors Influencing the Lifetime of Pure Beta‐Alumina Electrolyte

Factors Influencing the Lifetime of Pure Beta‐Alumina Electrolyte

The Influences of Sio2 on the Sintering Behavior and the Properties of Na+- Β/Β"-Al2O3 Solid Electrolyte

Li–S and Li–O2 Batteries with High Specific Energy

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