Synthesis and characterization of substituted garnet and perovskite-based lithium-ion conducting solid electrolytes

Abreu-Sepúlveda, Maria; Huq, Ashfia; Dhital, Chetan; Li, Yunchao; Paranthaman, M. Parans; Zaghib, Karim; Manivannan, A.

doi:10.1007/s11581-015-1556-2

Synthesis and characterization of substituted garnet and perovskite-based lithium-ion conducting solid electrolytes

Journal Article · Wed Sep 30 00:00:00 EDT 2015 · Ionics

DOI:https://doi.org/10.1007/s11581-015-1556-2· OSTI ID:1241462

Abreu-Sepúlveda, Maria ^[1]; Huq, Ashfia ^[2]; Dhital, Chetan ^[2]; Li, Yunchao ^[2]; Paranthaman, M. Parans ^[2]; Zaghib, Karim ^[3]; Manivannan, A. ^[4]

National Energy Technology Lab. (NETL), Albany, OR (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Hydro-Quebec, Montreal, QC (Canada)
National Energy Technology Lab. (NETL), Albany, OR (United States); West Virginia Univ., Morgantown, WV (United States)

In this study, titanium, tantalum-substituted Li₇La₃Z_r2-xA_xO₁₂ (LLZO, A = Ta, Ti) garnets, and chromium-substituted La_(2/3)-xLi_3xTi_1-yCr_yO₃ (LLTO) perovskites were prepared by a conventional solid-state reaction and the Pechini processes. The desired crystal phases were obtained by varying the calcination temperature and time, as well as the substitution concentration. All samples indicated decomposition of the precursors when heated above 750 °C and formation of the desired phase after heat treatment at higher temperatures. Neutron diffraction data shows the formation of a predominant cubic phase in the case of Ta-LLZO, and monoclinic phase with minor impurity phases for Cr-LLTO. Ionic conductivity for Ti-LLZO (Li₇La₃Zr_1.4Ti_0.6O₁₂), Ta-LLZO (Li_6.03La₃Zr_1.533Ta_0.46O₁₂), and Cr-LLTO (La_(2/3)-xLi_3xTi_0.9Cr_0.1O₃) at room temperature were found to be 5.21 × 10^–6, 1.01 ×10^–6, and 1.2 × 10^–4 S cm^–1, respectively. The activation energies of the compounds were determined from the Arrhenius plot and were 0.44 eV (Ti_0.6-LLZO), 0.54 eV (Ta_0.5-LLZO), and 0.20 eV (Cr_0.1-LLTO).

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1241462

Journal Information:: Ionics, Journal Name: Ionics Journal Issue: 3 Vol. 22; ISSN 0947-7047

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
Perovskite
garnet
lithium-ion conduction
solid electrolytes
solid-state lithium-ion battery

Synthesis and characterization of substituted garnet and perovskite-based lithium-ion conducting solid electrolytes

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