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Title: Material Design Strategy for Halide Solid Electrolytes Li3MX6 (X = Cl, Br, and I) for All-Solid-State High-Voltage Li-Ion Batteries

Journal Article · · Chemistry of Materials

Although several solid electrolyte (SE) candidates have been explored, achieving the necessary combination of performance, stability, and processability has been challenging. Recently, several lithium ternary halides have attracted increasing attention for SEs because of their favorable combination of high ionic conductivity and wide electrochemical window. This study aims to provide a material design strategy for lithium halides Li3MX6 (X = Cl, Br, and I) for high-voltage all-solid-state Li-ion batteries, achieved by the systematic investigation of crystal structures, phase and electrochemical stabilities, electronic and mechanical properties, and ionic conductivities. Calculation results reveal that the electronegativity difference between M and X affects structural properties and stabilities. Weak Coulomb interactions in Li3MX6 result in the preference of the monoclinic phase, and the oxidation potential and chemical stability against the cathode materials of Li3MX6 increase for relatively small X. Chlorides exhibit the highest oxidation potential (~4.3 V) among Li3MX6, suggesting that chlorides are appropriate SEs for high-voltage cathodes. The band gap and elastic moduli increase for relatively small X, suggesting the relatively low electronic conductivity and elastic deformability of chlorides. Chlorides with transition metals typically exhibit trigonal phases, a wider electrochemical stability window, a larger band gap, and higher elastic moduli compared to other types of halides. Additionally, chloride Li3MCl6 is expected to have relatively high ionic conductivities with the aliovalent substitution of M3+ to Zr4+ and the anion mixing of Cl with Br. The findings of this study will provide fundamental guidelines for the development of lithium halide SEs for high-voltage all-solid-state Li-ion batteries.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; National Research Foundation of Korea (NRF)
Grant/Contract Number:
AC52-07NA27344; 2017M1A2A2044482
OSTI ID:
1810664
Report Number(s):
LLNL-JRNL-819471; 1030326
Journal Information:
Chemistry of Materials, Vol. 33, Issue 10; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (46)

High-Voltage Superionic Halide Solid Electrolytes for All-Solid-State Li-Ion Batteries journal January 2020
Elastic Properties of the Solid Electrolyte Li 7 La 3 Zr 2 O 12 (LLZO) journal December 2015
Challenges for Rechargeable Li Batteries journal February 2010
Efficient hybrid density functional calculations in solids: Assessment of the Heyd–Scuseria–Ernzerhof screened Coulomb hybrid functional journal July 2004
Substitution effect of ionic conductivity in lithium ion conductor, LI3INBR6−xCLx journal September 2008
Predicting Charge Transfer Stability between Sulfide Solid Electrolytes and Li Metal Anodes journal December 2020
Alloying effects on superionic conductivity in lithium indium halides for all-solid-state batteries journal April 2018
A lithium superionic conductor journal July 2011
Role of Dynamically Frustrated Bond Disorder in a Li + Superionic Solid Electrolyte journal October 2016
Chemical accuracy for the van der Waals density functional journal December 2009
The Elastic Behaviour of a Crystalline Aggregate journal May 1952
Water‐Mediated Synthesis of a Superionic Halide Solid Electrolyte journal November 2019
High-power all-solid-state batteries using sulfide superionic conductors journal March 2016
Mechanochemical Synthesis: A Tool to Tune Cation Site Disorder and Ionic Transport Properties of Li 3 MCl 6 (M = Y, Er) Superionic Conductors journal December 2019
Structural change of Li2S–P2S5 sulfide solid electrolytes in the atmosphere journal February 2011
Structural, elastic, electronic and optical properties of lithium halides (LiF, LiCl, LiBr, and LiI): First-principle calculations journal April 2020
New Lithium Ion Conductor Li 3 InBr 6 Studied by 7 Li NMR journal March 1998
A unified formulation of the constant temperature molecular dynamics methods journal July 1984
Tuning ionic conductivity and electrode compatibility of Li3YBr6 for high-performance all solid-state Li batteries journal November 2020
Elastic Properties of Alkali Superionic Conductor Electrolytes from First Principles Calculations journal November 2015
Theoretical Design of Lithium Chloride Superionic Conductors for All-Solid-State High-Voltage Lithium-Ion Batteries journal July 2020
Lithium/Sulfur Secondary Batteries: A Review journal June 2016
Thermodynamic Assessment of Coating Materials for Solid-State Li, Na, and K Batteries journal September 2019
The Indium−Lithium Electrode in Solid‐State Lithium‐Ion Batteries: Phase Formation, Redox Potentials, and Interface Stability journal March 2019
Sulfide Solid Electrolytes for Lithium Battery Applications journal August 2018
Solid Halide Electrolytes with High Lithium-Ion Conductivity for Application in 4 V Class Bulk-Type All-Solid-State Batteries journal September 2018
Tailoring the Cation Lattice for Chloride Lithium‐Ion Conductors journal September 2020
Commentary: The Materials Project: A materials genome approach to accelerating materials innovation journal July 2013
Sulfide Solid Electrolyte with Favorable Mechanical Property for All-Solid-State Lithium Battery journal July 2013
Li−Fe−P−O 2 Phase Diagram from First Principles Calculations journal February 2008
Statistical variances of diffusional properties from ab initio molecular dynamics simulations journal April 2018
Elastic constants of LiBr from 300° to 4.2°K journal August 1969
Mechanical properties of sulfide glasses in all-solid-state batteries journal January 2018
Towards greener and more sustainable batteries for electrical energy storage journal November 2014
Site-Occupation-Tuned Superionic Li x ScCl 3+ x Halide Solid Electrolytes for All-Solid-State Batteries journal March 2020
Interface Stability in Solid-State Batteries journal December 2015
Electrochemical Window of the Li-Ion Solid Electrolyte Li 7 La 3 Zr 2 O 12 journal January 2017
Lithium Chlorides and Bromides as Promising Solid‐State Chemistries for Fast Ion Conductors with Good Electrochemical Stability journal June 2019
High Ionic Conductivity Achieved in Li 3 Y(Br 3 Cl 3 ) Mixed Halide Solid Electrolyte via Promoted Diffusion Pathways and Enhanced Grain Boundary journal December 2020
New Cost‐Effective Halide Solid Electrolytes for All‐Solid‐State Batteries: Mechanochemically Prepared Fe 3+ ‐Substituted Li 2 ZrCl 6 journal January 2021
Rechargeable Solid-State Li-Air and Li-S Batteries: Materials, Construction, and Challenges journal September 2017
Lithium‐Metal Anode Instability of the Superionic Halide Solid Electrolytes and the Implications for Solid‐State Batteries journal February 2021
Mitigating the Interfacial Degradation in Cathodes for High-Performance Oxide-Based Solid-State Lithium Batteries journal January 2019
Status and challenges in enabling the lithium metal electrode for high-energy and low-cost rechargeable batteries journal December 2017
Python Materials Genomics (pymatgen): A robust, open-source python library for materials analysis journal February 2013
Materials perspective on new lithium chlorides and bromides: insights into thermo-physical properties journal January 2020