Thermo-mechanical behaviours of Li3La1/3-MO3 (M = Ta and Nb)

Araki, Wakako; Nagakura, Yasuhiro; Arai, Yasuhiko

doi:10.1016/j.ceramint.2019.11.097

Cited by 11 publications

(5 citation statements)

References 22 publications

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“…Owing to this drawback, only few reports on the application of the bare LLTO electrolyte for ASSBs have been published. However, for academic purposes, the study conducted by Araki et al [476] on the fundamental physical properties of Li 3x La 1/3−x MO 3 (M = Ta, Nb) revealed that the thermal expansion coefficient was~3 × 10 −6 K −1 above 400 K regardless of x. More studies were conducted to analyze modified synthesis methods, understand the interface mechanisms, and improve the conductivity using modified strategies [276,[477][478][479][480][481][482][483][484][485][486][487][488][489][490][491] such as combining 10-15 wt.% LLTO electrolyte with polymer electrolytes/ionic liquid [492] or commercial 1 mol L −1 LiPF 6 in mixture of ethylene carbonate+dimethyl carbonate+diethyl carbonate (EC:DMC:DEC) electrolytes with LLTO, and in some cases using polymer separators.…”

Section: Perovskite-type Structure Electrolytesmentioning

confidence: 99%

Sulfide and Oxide Inorganic Solid Electrolytes for All-Solid-State Li Batteries: A Review

et al. 2020

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Energy storage materials are finding increasing applications in our daily lives, for devices such as mobile phones and electric vehicles. Current commercial batteries use flammable liquid electrolytes, which are unsafe, toxic, and environmentally unfriendly with low chemical stability. Recently, solid electrolytes have been extensively studied as alternative electrolytes to address these shortcomings. Herein, we report the early history, synthesis and characterization, mechanical properties, and Li+ ion transport mechanisms of inorganic sulfide and oxide electrolytes. Furthermore, we highlight the importance of the fabrication technology and experimental conditions, such as the effects of pressure and operating parameters, on the electrochemical performance of all-solid-state Li batteries. In particular, we emphasize promising electrolyte systems based on sulfides and argyrodites, such as LiPS5Cl and β-Li3PS4, oxide electrolytes, bare and doped Li7La3Zr2O12 garnet, NASICON-type structures, and perovskite electrolyte materials. Moreover, we discuss the present and future challenges that all-solid-state batteries face for large-scale industrial applications.

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Section: Perovskite-type Structure Electrolytesmentioning

confidence: 99%

Sulfide and Oxide Inorganic Solid Electrolytes for All-Solid-State Li Batteries: A Review

et al. 2020

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“…Although the Li concentration of 0.086 in the grown crystals is very low, the ionic conductivity of the single crystals is three times higher than that of polycrystalline LLTaO with x = 0.18 in Table 1, which is the maximum ionic conductivity (• = 7 © 10 ¹5 S•cm ¹1 ) in the reported data of LLTaO. 18) The temperature dependence of the ionic conductivity of the grown crystals in the range of room temperature to 498 K is shown in Fig. 6.…”

Section: Jcs-japanmentioning

confidence: 71%

“…It was reported that the polycrystalline LLTaO exhibited a maximum ionic conductivity of 7 © 10 ¹5 S•cm ¹1 with x = 0.18. Because LLTaO (x = 0.18) has a tetragonal double-perovskite-type structure with lattice parameters (a = 3.94 ¡ and c = 7.96 ¡ at room temperature), 18) the conductivity of LLTaO is expected to be anisotropic. LLTaO single crystals are required for elucidating the anisotropic ionic conductivity and bulk properties with no grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

Traveling solvent floating zone growth and anisotropic ionic conductivity of LixLa(1−x)/3TaO3 single crystals

Salma

Maruyama

Nagao

et al. 2023

J. Ceram. Soc. Japan

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In this study, single crystals of double-perovskite-type oxide Li x La (1¹x)/3 TaO 3 (LLTaO) were successfully grown using the traveling solvent floating zone (TSFZ) method. The Ta-rich phase, which was precipitated in the crystals, was grown via the conventional floating zone (FZ) growth process, indicating that LLTaO behaved as an incongruent melt. For the TSFZ growth for solvents with a LiTa 3 O 8 composition of 8 %, which is less than the LLTaO (x = 0.18) stoichiometric composition, the black grown crystals were homogeneous and crack-free, with a typical size of approximately 20 mm in length and 5 mm in diameter. The grown crystals turned colorless and transparent after being left overnight in the air at room temperature (about 25 °C). The Li concentration in the grown crystals was determined to be x = 0.086(1). This value is lower than the nominal composition (x = 0.18) of the feed owing to Li evaporation during the crystal growth. The ionic conductivities of the grown crystals along [110] and [001] were 2.8 © 10 ¹5 and 1.8 © 10 ¹5 S•cm ¹1 , respectively. The anisotropic parameter was determined to be 1.56 indicating that the ionic conductivity along the ab-plane is higher than that along the c-axis. Furthermore, the calculated activation energies along [110] and [001] were 0.29 and 0.34 eV, respectively.

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“…The aand c-axis constants of Li x La (1¹x)/3 TaO 3 have been reported to be longer than those of Li x La (1¹x)/3 NbO 3 . 18) Xiang et al reported that the MO bond length in Li 6.4 La 3 Zr 1.4 M 0.6 O 12 (M = Sb, Ta, Nb) increases with increasing M content due to weakening coulombic attraction. 23) In the present study, the lattice-parameter values might increase gradually due to increasing coulombic repulsion at higher Ta compositions.…”

Section: Methodsmentioning

confidence: 99%

“…The crystal structures of Li x La (1¹x)/3 NbO 3 and Li x La (1¹x)/3 TaO 3 double perovskites depend on the Li concentration; Li x La (1¹x)/3 NbO 3 exhibits an orthorhombic structure when x¯0.05, a tetragonal structure when 0.10¯x¯0.20, and a cubic structure when x = 0.25, 9),17), 18) while the crystal structure of Li x La (1¹x)/3 -TaO 3 changes from tetragonal to cubic with increasing Li concentration. 18)20) Moreover, Li x La (1¹x)/3 NbO 3 and Li x La (1¹x)/3 TaO 3 have been reported to exhibit high ionic conductivities at x = 0.060.1.…”

Section: )4)mentioning

confidence: 99%

Synthesis and ionic conductivity of LixLa(1−x)/3Nb1−yTayO3 solid solutions

Maruyama

Nagao

Watauchi

et al. 2020

J. Ceram. Soc. Japan

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In this study, solid solutions of double-perovskite-type Li x La (1¹x)/3 Nb 1¹y Ta y O 3 (x = 0.1, y = 0.01.0) were synthesized by solid-state reaction. We successfully prepared tetragonal Li 0.1 La 0.3 Nb 1¹y Ta y O 3 single phases by increasing the reaction temperature and the Ta composition. The lattice constants of Li 0.1 La 0.3 Nb 1¹y Ta y O 3 were observed to increase with increasing Ta composition, and densified Li 0.1 La 0.3 Nb 1¹y Ta y O 3 pellets composed of larger grains than Li 0.1 La 0.3 NbO 3 and Li 0.1 La 0.3 TaO 3 were obtained. The relationship between the NbTa solid solution in Li 0.1 La 0.3 Nb 1¹y Ta y O 3 and ionic conductivity was investigated, which revealed that Li 0.1 La 0.3 Nb 1¹y Ta y O 3 (y = 0.2) exhibited maximum ionic conductivity (• = 7.78 © 10 ¹5 S cm ¹1) at room temperature and that ionic conductivity decreased with increasing Ta composition. The activation energies of Li 0.1 La 0.3 Nb 1¹y Ta y O 3 were found to be 0.34 0.38 eV and increased with increasing Ta composition.

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Thermo-mechanical behaviours of Li3La1/3-MO3 (M = Ta and Nb)

Cited by 11 publications

References 22 publications

Sulfide and Oxide Inorganic Solid Electrolytes for All-Solid-State Li Batteries: A Review

Sulfide and Oxide Inorganic Solid Electrolytes for All-Solid-State Li Batteries: A Review

Traveling solvent floating zone growth and anisotropic ionic conductivity of Li<i><sub>x</sub></i>La<sub>(1−</sub><i><sub>x</sub></i><sub>)/3</sub>TaO<sub>3</sub> single crystals

Synthesis and ionic conductivity of Li<i><sub>x</sub></i>La<sub>(1−</sub><i><sub>x</sub></i><sub>)/3</sub>Nb<sub>1−</sub><i><sub>y</sub></i>Ta<i><sub>y</sub></i>O<sub>3</sub> solid solutions

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