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Title: Origin of high Li⁺ conduction in doped Li₇La₃Zr₂O₁₂ garnets

Journal Article · · Chemistry of Materials
 [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Substitution of a native ion in the crystals with a foreign ion that differs in valence (aliovalent doping) has been widely attempted to upgrade solid-state ionic conductors for various charge carriers including O²⁻, H⁺, Li⁺, Na⁺, etc. The doping helps promote the high-conductive framework and dredge the tunnel for fast ion transport. The garnet-type Li₇La₃Zr₂O₁₂ (LLZO) is a fast Li⁺ solid conductor, which received much attention as an electrolyte candidate for all-solid-state lithium ion batteries, showing great potential to offer high energy density and minimize battery safety concerns to meet extensive applications in large energy storage systems such as those for electric vehicles and aerospace. In the Li-stuffed garnet framework of LLZO, the 3D pathway formed by the incompletely occupied tetrahedral sites bridged by a single octahedron enables the superior Li⁺ conductivity. For optimal performance, many aliovalent-doping efforts have been made throughout metal elements (Al³⁺, Ta⁵⁺) and metalloid elements (Ga³⁺, Te⁶⁺) in the periodic table with various valences to stabilize the high-conductive phase and increase the Li vacancy concentration.

Research Organization:
Oak Ridge National Laboratory (ORNL). Center for Nanophase Materials Sciences (CNMS); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1213330
Journal Information:
Chemistry of Materials, Vol. 27, Issue 16; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 70 works
Citation information provided by
Web of Science

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Cited By (16)

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Sur-/interfacial regulation in all-solid-state rechargeable Li-ion batteries based on inorganic solid-state electrolytes: advances and perspectives journal January 2019
Lithium ion micrometer diffusion in a garnet-type cubic Li 7 La 3 Zr 2 O 12 (LLZO) studied using 7 Li NMR spectroscopy journal January 2017
Mechanistic understanding and strategies to design interfaces of solid electrolytes: insights gained from transmission electron microscopy journal May 2019
Electrochemical and mechanical stability of Li x La 0.557 TiO 3‐ δ perovskite electrolyte at various voltages journal September 2018
Sol Gel vs Solid State Synthesis of the Fast Lithium-Ion Conducting Solid State Electrolyte Li 7 La 3 Zr 2 O 12 Substituted with Iron journal January 2019
Tracing Phase Transformation and Lattice Evolution in a TRIP Sheet Steel under High-Temperature Annealing by Real-Time In Situ Neutron Diffraction journal September 2018
Lattice-geometry effects in garnet solid electrolytes: a lattice-gas Monte Carlo simulation study journal November 2017
Fast Lithium Ion Conduction in Lithium Phosphidoaluminates journal January 2020
An efficient multi-doping strategy to enhance Li-ion conductivity in the garnet-type solid electrolyte Li 7 La 3 Zr 2 O 12 journal January 2019
Microwave assisted reactive sintering for Al doped Li 7 La 3 Zr 2 O 12 lithium ion solid state electrolyte journal December 2019
Lithium diffusion in L i 2 X ( X = O , S, and Se): Ab initio simulations and inelastic neutron scattering measurements journal June 2019
An Air-Stable Na 3 SbS 4 Superionic Conductor Prepared by a Rapid and Economic Synthetic Procedure journal June 2016
Fast Lithium Ion Conduction in Lithium Phosphidoaluminates journal January 2020
Sol Gel vs Solid State Synthesis of the Fast Lithium-Ion Conducting Solid State Electrolyte Li7La3Zr2O12 Substituted with Iron text January 2019
Lattice-Geometry Effects in Garnet Solid Electrolytes: A Lattice-Gas Monte Carlo Simulation Study preprint January 2017