<abstract xmlns="http://www.w3.org/1999/xhtml">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.</abstract>

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.

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

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Dielectric and impedance analysis of LiLaTiZrO(x = 0.05 and 0.1) ceramics as improved electrolyte material for lithium-ion batteries

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...

Temperature [°C]	Li_0.5La_0.5Ti_1-xZr_xO₃ (x = 0.05)	Li_0.5La_0.5Ti_1-xZr_xO₃ (x = 0.1)
30	6.33 × 10^-4	1.01 × 10^-4
40	4.30 × 10^-4	5.66 × 10^-4
50	3.22 × 10^-4	4.29 × 10^-4
60	3.07 × 10^-4	3.05 × 10^-4
70	3.46 × 10^-4	1.77 × 10^-4
80	5.47 × 10^-4	1.37 ×10^-4
90	1.15 × 10^-3	1.08 × 10^-4
100	2.98 × 10^-3	1.03 × 10^-4

x-value	Experimental	Theoretical	Lattice parameter	Volume	Crystallite
	density	density	[Å]	[Å³]	size [nm]
0.05	4.8349	4.3589	3.8643	57.7048	68.5
0.1	4.8335	4.5335	3.8632	57.6556	62.31

Dielectric and impedance analysis of Li_0.5La_0.5Ti_1-xZr_xO₃(x = 0.05 and 0.1) ceramics as improved electrolyte material for lithium-ion batteries

Article Category: Research Article

Publié en ligne: 12 oct. 2016

Pages: 605 - 616

Reçu: 23 déc. 2015

Accepté: 21 juil. 2016

DOI: https://doi.org/10.1515/msp-2016-0092

Mots clés
lithium lanthanum titanate, X-ray diffraction, impedance spectroscopy, perovskite oxides

© 2016 K. Vijaya Babu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Fig. 9

Fig. 10

Fig. 11

Fig. 12

Fig. 13

AC conductivity values for Li0.5La0.5Ti1-xZrxO3(x = 0.05 and 0.1) at different temperatures.

Comparison of densities, lattice parameter (a in Å ) and unit cell volume (V in Å3) for Li0.5La0.5Ti1-xZrxO3 (x = 0.05 and 0.1).

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

Article Category: Research Article

Publié en ligne: 12 oct. 2016

Pages: 605 - 616

Reçu: 23 déc. 2015

Accepté: 21 juil. 2016

DOI: https://doi.org/10.1515/msp-2016-0092

Mots cléslithium lanthanum titanate, X-ray diffraction, impedance spectroscopy, perovskite oxides

© 2016 K. Vijaya Babu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Fig. 9

Fig. 10

Fig. 11

Fig. 12

Fig. 13

AC conductivity values for Li0.5La0.5Ti1-xZrxO3(x = 0.05 and 0.1) at different temperatures.

Comparison of densities, lattice parameter (a in Å ) and unit cell volume (V in Å3) for Li0.5La0.5Ti1-xZrxO3 (x = 0.05 and 0.1).

Dielectric and impedance analysis of Li_0.5La_0.5Ti_1-xZr_xO₃(x = 0.05 and 0.1) ceramics as improved electrolyte material for lithium-ion batteries

Mots clés
lithium lanthanum titanate, X-ray diffraction, impedance spectroscopy, perovskite oxides