Ionic conduction of lithium for Perovskite-type compounds, Li x La (1− x )/3 NbO 3 and (Li 0.25 La 0.25 ) 1− x Sr 0.5 x NbO 3

Kawakami, Yoshihiro; Ikuta, Hiromasa; Wakihara, Masataka

doi:10.1007/s100080050089

Cited by 52 publications

(49 citation statements)

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“…17) [58,59]. For example, AGr.30oK of Ta205 is -1910 kJ/mol, which is higher in magnitude than that of Nb205 (-1765 kJ/mol) [61].…”

Section: Examples Of the Proof Of The Gibbs Energymentioning

confidence: 99%

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Solid state lithium ion conductors: Design considerations by thermodynamic approach

Thangadurai¹,

Weppner²

2002

Ionics

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Abstract. The most common previously employed methods of designing useful solid state lithium ion conductors (SSLICs) are reviewed and a new approach for the rational design of advanced SSLICs is described, which makes use of thermodynamic considerations. The described method is based on the Gibbs energy of formation of binary compounds of substitutional or additional cations (including dopants) and is demonstrated by the improvement of the lithium ion conductivity of SSLICs having perovskite-, NASICON-and Li4SiO4-type structures. Dopant metal oxides with higher negative Gibbs energies of formation than that of the parent metal oxide increase commonly the lithium ion conduction. The stronger binding forces of the oxide ion with the dopant cation result in an electrostatic shielding of the attractive forces between the lithium ions and the anions which facilitates the ionic motion. Irrespective of the crystal structure, it is expected that this thermodynamic rule holds also for other mobile ionic species.

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“…17) [58,59]. For example, AGr.30oK of Ta205 is -1910 kJ/mol, which is higher in magnitude than that of Nb205 (-1765 kJ/mol) [61].…”

Section: Examples Of the Proof Of The Gibbs Energymentioning

confidence: 99%

“…But this approach is practically not applicable in view of the low electrochemical decomposition voltages. [58,59]. The doping metal ions were chosen on the basis of the ionic radii as described by Shannon [60] and the generation of vacancies at the Asite.…”

Section: Basic Assumptions the New Approach Is Based Onmentioning

confidence: 99%

Solid state lithium ion conductors: Design considerations by thermodynamic approach

Thangadurai¹,

Weppner²

2002

Ionics

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“…Meanwhile, solid oxide electrolytes are stable in the ambient air, although they do not have a conductivity higher than the sulfide electrolytes. The perovskitetype (ABO 3 ) lithium ion conductors, La (2/3¹x) Li 3x TiO 3 (LLTO) 3 and La (1¹x)/3 Li x NbO 3 (LLNO) 9 are known as super ionic conductors having up to a 10 ¹5 S/cm conductivity. The ionic conductivity of the solid electrolyte significantly depends on the bulk structure.…”

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confidence: 99%

“…The maximum value of the single crystal LLNO was 1.9 © 10 ¹4 S/cm at x = 0.075, 10 which is higher than the maximum value of the polycrystal LLNO (4.7 © 10 ¹5 S/cm at x = 0.1). 9 The microstructure of perovskite-type single crystals, LLNO, was investigated by TEM.…”

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confidence: 99%

Expectation of a Scientific Breakthrough for Realization of a Sustainable Mobile Society

Iba

2015

Electrochemistry

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The development of high energy density devices produces a dramatic improvement in the cruising range of electric vehicles and significantly contributes to realizing a sustainable society. In recent years, innovative batteries, such as all-solid battery, metal-air battery and sodium-ion battery, etc., which are estimated to provide a superior battery performance better than the latest lithium-ion battery, are now being given significant attention. Meanwhile, a number of breakthroughs are required in order to achieve practical use of these innovative batteries. In this paper, we summarized the current research approaches of these innovative batteries.

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“…However, conductivity values are near the maximum reported of (Li,La)TiO 3 ceramics. Usually among used B-site ions, zirconium can be anticipated to be more electrochemically stable in compounds [7,17,18]. In this paper, we fabricated (Li 0.5-x Na x La 0.5 )Ti 0.8 Zr 0.2 O 3 (hereafter, LNLTZ) ceramics (x=0, 0.1, 0.2, 0.3 and 0.4 mole) with Na content.…”

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confidence: 99%

Electrochemical Properties of (Li_0.5-xNa_xLa_0.5)Ti_0.8Zr_0.2O₃Ceramics as Improved Electrolyte Materials for Li-ion Batteries

Lee¹,

Kim²,

Yun³

et al. 2014

Transactions on Electrical and Electronic Materials

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Electrochemical Properties of (Li 0.5-x Na x La 0.5 )Ti 0.8 Zr 0.2 O 3 Ceramics as Improved Electrolyte Materials for Li-ion Batteries INTRODUCTIONRecently, rechargeable lithium ion batteries have been widely used in consumer electronics and as power sources for sensors, portable terminals, electric vehicles, and various electronic equipments. Lithium ion batteries are well kwon for their high energy density, wide range of operation temperatures, and battery safety [1][2][3][4][5][6]. Consumers have obtained satisfaction during use of lithium ion batteries due to their safety, capacity, lifetime, and size. Among the characteristics of lithium ion batteries, safety requirements have been a high priority. However, the safety of lithium battery needs to be developed further [8][9][10][11][12]. Lithium ion batteries are used in everyday life, and liquid electrolytes could cause an explosion or a fire. Solid electrolytes are an alternative We fabricated (Li 0.5-x Na x La 0.5 )Ti 0.8 Zr 0.2 O 3 (LNTLZ)ceramics (0≤x≤0.4) with a perovskite structure via standard solid state synthesis. The influence of Na content on the structural and electrical properties of LNTLZ ceramics was also investigated. During XRD patterns analysis, all of the samples showed orthorhombic structure. The resistance of LNTLZ ceramics decreased as Na content increased, and the maximum activation energy shows 0.56 eV at x=0.4 at room temperature. These results indicated that LNTLZ ceramics are a candidate for use Lithium ion batteries as electrolytes.

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Ionic conduction of lithium for Perovskite-type compounds, Li x La (1− x )/3 NbO 3 and (Li 0.25 La 0.25 ) 1− x Sr 0.5 x NbO 3

Cited by 52 publications

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Solid state lithium ion conductors: Design considerations by thermodynamic approach

Solid state lithium ion conductors: Design considerations by thermodynamic approach

Expectation of a Scientific Breakthrough for Realization of a Sustainable Mobile Society

Electrochemical Properties of (Li_0.5-xNa_xLa_0.5)Ti_0.8Zr_0.2O₃Ceramics as Improved Electrolyte Materials for Li-ion Batteries

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Ionic conduction of lithium for Perovskite-type compounds, Li x La (1− x )/3 NbO 3 and (Li 0.25 La 0.25 ) 1− x Sr 0.5 x NbO 3

Cited by 52 publications

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Solid state lithium ion conductors: Design considerations by thermodynamic approach

Solid state lithium ion conductors: Design considerations by thermodynamic approach

Expectation of a Scientific Breakthrough for Realization of a Sustainable Mobile Society

Electrochemical Properties of (Li0.5-xNaxLa0.5)Ti0.8Zr0.2O3Ceramics as Improved Electrolyte Materials for Li-ion Batteries

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Electrochemical Properties of (Li_0.5-xNa_xLa_0.5)Ti_0.8Zr_0.2O₃Ceramics as Improved Electrolyte Materials for Li-ion Batteries