High lithium ionic conductivity in the Li1+xAlxGeyTi2-x-y (PO4)3 NASICON series

Pilar Maldonado-Manso; Enrique R. Losilla; María Martínez-Lara; Miguel A.G. Aranda; Sebastián Bruque; Fatima E. Mouahid; Mohammed Zahir

doi:10.1021/cm021717j

High lithium ionic conductivity in the Li_1+xAl_xGe_yTi_2-x-y (PO₄)₃ NASICON series

Pilar Maldonado-Manso
, Enrique R. Losilla
, María Martínez-Lara
, Miguel A.G. Aranda
, Sebastián Bruque^*
, Fatima E. Mouahid
, Mohammed Zahir

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

110 Scopus citations

Abstract

Two Li_1+xAl_xGe_yTi_2-x-y (PO₄)₃ (0.2 ≤ x ≤ 0.8; y = 0.8, 1.0) solid solutions have been prepared as polycrystalline powders. These compounds crystallize in the NASICON-type structure, R3c space group, and the crystal structures have been characterized by the Rietveld method with laboratory X-ray powder diffraction data. The cell parameters evolution along the two series agrees with the substitution of larger Ti⁴⁺ by smaller Ge⁴⁺ and Al³⁺ cations. The electrical properties have been characterized by an impedance study. Bulk conductivity values at room temperature are close to 10^-3 S·cm^-1 with low activation energies (≃0.35 eV). The trajectories of the Li⁺ cations have been simulated from the bond valence sum calculation. Structural keys, which justify the high ionic conductivity and the low activation energy, are discussed.

Original language	English
Pages (from-to)	1879-1885
Number of pages	7
Journal	Chemistry of Materials
Volume	15
Issue number	9
DOIs	https://doi.org/10.1021/cm021717j
State	Published - 6 May 2003
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

Access to Document

10.1021/cm021717j

Cite this

@article{5fe588a1adbb4e4585356eccd231a35c,

title = "High lithium ionic conductivity in the Li1+xAlxGeyTi2-x-y (PO4)3 NASICON series",

abstract = "Two Li1+xAlxGeyTi2-x-y (PO4)3 (0.2 ≤ x ≤ 0.8; y = 0.8, 1.0) solid solutions have been prepared as polycrystalline powders. These compounds crystallize in the NASICON-type structure, R3c space group, and the crystal structures have been characterized by the Rietveld method with laboratory X-ray powder diffraction data. The cell parameters evolution along the two series agrees with the substitution of larger Ti4+ by smaller Ge4+ and Al3+ cations. The electrical properties have been characterized by an impedance study. Bulk conductivity values at room temperature are close to 10-3 S·cm-1 with low activation energies (≃0.35 eV). The trajectories of the Li+ cations have been simulated from the bond valence sum calculation. Structural keys, which justify the high ionic conductivity and the low activation energy, are discussed.",

author = "Pilar Maldonado-Manso and Losilla, \{Enrique R.\} and Mar{\'i}a Mart{\'i}nez-Lara and Aranda, \{Miguel A.G.\} and Sebasti{\'a}n Bruque and Mouahid, \{Fatima E.\} and Mohammed Zahir",

year = "2003",

month = may,

day = "6",

doi = "10.1021/cm021717j",

language = "English",

volume = "15",

pages = "1879--1885",

journal = "Chemistry of Materials",

issn = "0897-4756",

publisher = "American Chemical Society",

number = "9",

}

TY - JOUR

T1 - High lithium ionic conductivity in the Li1+xAlxGeyTi2-x-y (PO4)3 NASICON series

AU - Maldonado-Manso, Pilar

AU - Losilla, Enrique R.

AU - Martínez-Lara, María

AU - Aranda, Miguel A.G.

AU - Bruque, Sebastián

AU - Mouahid, Fatima E.

AU - Zahir, Mohammed

PY - 2003/5/6

Y1 - 2003/5/6

N2 - Two Li1+xAlxGeyTi2-x-y (PO4)3 (0.2 ≤ x ≤ 0.8; y = 0.8, 1.0) solid solutions have been prepared as polycrystalline powders. These compounds crystallize in the NASICON-type structure, R3c space group, and the crystal structures have been characterized by the Rietveld method with laboratory X-ray powder diffraction data. The cell parameters evolution along the two series agrees with the substitution of larger Ti4+ by smaller Ge4+ and Al3+ cations. The electrical properties have been characterized by an impedance study. Bulk conductivity values at room temperature are close to 10-3 S·cm-1 with low activation energies (≃0.35 eV). The trajectories of the Li+ cations have been simulated from the bond valence sum calculation. Structural keys, which justify the high ionic conductivity and the low activation energy, are discussed.

AB - Two Li1+xAlxGeyTi2-x-y (PO4)3 (0.2 ≤ x ≤ 0.8; y = 0.8, 1.0) solid solutions have been prepared as polycrystalline powders. These compounds crystallize in the NASICON-type structure, R3c space group, and the crystal structures have been characterized by the Rietveld method with laboratory X-ray powder diffraction data. The cell parameters evolution along the two series agrees with the substitution of larger Ti4+ by smaller Ge4+ and Al3+ cations. The electrical properties have been characterized by an impedance study. Bulk conductivity values at room temperature are close to 10-3 S·cm-1 with low activation energies (≃0.35 eV). The trajectories of the Li+ cations have been simulated from the bond valence sum calculation. Structural keys, which justify the high ionic conductivity and the low activation energy, are discussed.

UR - https://www.scopus.com/pages/publications/0037739623

U2 - 10.1021/cm021717j

DO - 10.1021/cm021717j

M3 - Article

AN - SCOPUS:0037739623

SN - 0897-4756

VL - 15

SP - 1879

EP - 1885

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 9