Ionic conduction of lithium for perovskite type compounds, (Li0.05La0.317)1−Sr0.5NbO3, (Li0.1La0.3)1−Sr0.5NbO3 and (Li0.25La0.25)1−M0.5NbO3 (M=Ca and Sr)

Kawakami, Yoshihiro; Fukuda, Masaaki; Ikuta, Hiromasa; Wakihara, Masataka

doi:10.1016/s0167-2738(98)00131-3

Cited by 41 publications

(32 citation statements)

References 14 publications

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“…Both for Ag-and Li-doped samples, it is noticed that the doublets of (400) and (040) of the orthorhombic symmetry for x B 0.12 compositions merged into (040) peak of the tetragonal phase for the 0.16 B x B 0.20 compositions. All these results discussed above were similar to that found in La (1 -x)/3 Ag x NbO 3 [13]. It is worth noting here that Li-doped specimens show a more rapid increase in crystal symmetry with increasing…”

Section: Resultssupporting

confidence: 88%

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Structure and dielectric properties of A-site-deficient perovskite Nd(1 − x)/3M x NbO3 (M = Li, Ag; 0 ≤ x ≤ 0.20) ceramics

2012

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Crystal structure and dielectric properties of the A-site-deficient perovskites Nd (1 -x)/3 M x NbO 3 (M = Li, Ag; 0 B x B 0.20) ceramics were investigated with X-ray diffractometer (XRD), network analyzer, and impedance analyzer. XRD results showed that no secondary phase was observed for Ag-doped specimens. However, a second phase LiNdNb 2 O 7 appeared for Li-doped ones when x C 0.16. The crystal structure at room temperature transformed from orthorhombic (0 B x \ 0.16) into tetragonal symmetry (0.16 B x B 0.20) with the increase of x. Complex impedance analysis and the dielectric properties measured at low frequency showed that the dielectric loss in Nd (1 -x)/3 M x NbO 3 (M = Li, Ag; 0 B x B 0.20) at low frequency was mainly caused by the lithium or silver ionic conduction, which increased with the increase of temperature. However, the dielectric loss originated from the ionic conductivity was frozen at microwave frequency. The dielectric constant (e r ) increased with the addition of Ag, whereas it decreased with the increase of Li addition. The pure and Ag-doped specimens exhibited large positive temperature coefficient of resonant frequency (s f ), while the s f value changed from positive into negative with the increase of Li addition. The Q 9 f value increased from 437 to 1,110 GHz in the case of Li doping and 765 GHz in the case of Ag doping, respectively, when x increased from 0 to 0.12. Further increase in x decreased the Q 9 f values both for the Li-and Ag-doped specimens. Good combined microwave dielectric properties with e r = 153, Q 9 f = 1,110 GHz and s f = -45 ppm/°C could be obtained for the Li-doped specimen when x = 0.12.

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Section: Resultssupporting

confidence: 88%

“…. It indicates the A-site cation ordering degree decreased with the increase of lithium or silver content, which is in agreement with that of La (1 -x)/3 Ag x NbO 3 [12] and La (1 -x)/3 Li x NbO 3 [13]. In order to further clarify the change of the crystal symmetry of Nd ( Fig.…”

Section: Resultssupporting

confidence: 83%

Structure and dielectric properties of A-site-deficient perovskite Nd(1 − x)/3M x NbO3 (M = Li, Ag; 0 ≤ x ≤ 0.20) ceramics

2012

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“…In recent years, La 1/3 NbO 3 was a subject of intensive research, because of its potential usage in solid-state electrochemical cells and Li-ion batteries [10][11][12]. The Raman active modes were identified, and studied up to 500°C [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Pressure-induced amorphization of La1/3NbO3

Noked

Yakovlev²,

Greenberg³

et al. 2011

Journal of Non-Crystalline Solids

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“…For all the temperatures, a strong frequency dispersion of permittivity is observed in the low frequency region followed by a nearly frequency independent behavior above 100 kHz. The decrease of ε r with increase in frequency may be attributed to the electrical relaxation processes, but at the same time the material electrode polarization cannot be ignored, as the samples used in our investigation are ionic conductors [37,38]. The material electrode interfacial polarization is superimposed with other relaxation processes at low frequencies.…”

Section: Dielectric Constant (ε R )mentioning

confidence: 97%

Dielectric and impedance analysis of Li0.5La0.5Ti1-xZrxO3(x = 0.05 and 0.1) ceramics as improved electrolyte material for lithium-ion batteries

Babu

Veeraiah

2016

Materials Science-Poland

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The most attractive property of Li0.5La0.5TiO3 (LLTO) electrolytes is their high ionic conductivity. Studies have shown that LLTO is capable of existing in a state with an ionic conductivity of 10-3 S/cm, which is comparable to liquid electrolytes. In addition to the high ionic conductivity of the material, LLTO is electrochemically stable and able to withstand hundreds of cycles. So, the studies of the solid electrolyte material are very important for the development of lithium-ion batteries. In the present paper, Li0.5La0.5Ti1-xZrxO3 (x = 0.05 and 0.1) have been prepared by a solid-state reaction method at 1300 °C for 6 hours to improve electrolyte materials for lithium-ion batteries. The phase identified by X-ray diffractometry and crystal structure corresponds to pm3m (2 2 1) space group (Z = 1). The frequency and temperature dependence of impedance, dielectric permittivity, dielectric loss and electric modulus of the Li0.5La0.5Ti1-xZrxO3 (x = 0.05 and 0.1) have been investigated. The dielectric and impedance properties have been studied over a range of frequency (42 Hz to 5 MHz) and temperatures (30 °C to 100 °C). The frequency dependent plot of modulus shows that the conductivity relaxation is of non-Debye type.

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Ionic conduction of lithium for perovskite type compounds, (Li0.05La0.317)1−Sr0.5NbO3, (Li0.1La0.3)1−Sr0.5NbO3 and (Li0.25La0.25)1−M0.5NbO3 (M=Ca and Sr)

Cited by 41 publications

References 14 publications

Structure and dielectric properties of A-site-deficient perovskite Nd(1 − x)/3M x NbO3 (M = Li, Ag; 0 ≤ x ≤ 0.20) ceramics

Structure and dielectric properties of A-site-deficient perovskite Nd(1 − x)/3M x NbO3 (M = Li, Ag; 0 ≤ x ≤ 0.20) ceramics

Pressure-induced amorphization of La1/3NbO3

Dielectric and impedance analysis of Li0.5La0.5Ti1-xZrxO3(x = 0.05 and 0.1) ceramics as improved electrolyte material for lithium-ion batteries

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