DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Dynamic Monkey Bar Mechanism of Superionic Li‐ion Transport in LiTaCl 6

Journal Article · · Angewandte Chemie
ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [2]
  1. Department of Chemical and Biomolecular Engineering Vanderbilt University Nashville TN-37235 USA
  2. Department of Chemical and Biomolecular Engineering Vanderbilt University Nashville TN-37235 USA, Department of Chemistry Vanderbilt University Nashville TN-37235 USA

Abstract The LiTaCl 6 solid electrolyte has the lowest activation energy of ionic conduction at ambient conditions (0.165 eV), with a record high ionic conductivity for a ternary compound (11 mS cm −1 ). However, the mechanism has been unclear. We train machine‐learning force fields (MLFF) on ab initio molecular dynamics (AIMD) data on‐the‐fly and perform MLFF MD simulations of AIMD quality up to the nanosecond scale at the experimental temperatures, which allows us to predict accurate activation energy for Li‐ion diffusion (at 0.164 eV). Detailed analyses of trajectories and vibrational density of states show that the large‐amplitude vibrations of Cl ions in TaCl 6 enable the fast Li‐ion transport by allowing dynamic breaking and reforming of Li−Cl bonds across the space in between the TaCl 6 octahedra. We term this process the dynamic‐monkey‐bar mechanism of superionic Li + transport which could aid the development of new solid electrolytes for all‐solid‐state lithium batteries.

Sponsoring Organization:
USDOE
Grant/Contract Number:
NONE; SC0023408
OSTI ID:
2251523
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (40)

Fast Lithium Ion Conduction in Garnet-Type Li7La3Zr2O12 journal October 2007
Spin-Torque Switching with the Giant Spin Hall Effect of Tantalum journal May 2012
Designing solid-state electrolytes for safe, energy-dense batteries journal February 2020
Enhanced ionic conductivity and lack of paddle-wheel effect in pseudohalogen-substituted Li argyrodites journal December 2022
Ordering of hidden multipoles in spin-orbit entangled 5 d 1 Ta chlorides journal July 2019
A lithium superionic conductor for millimeter-thick battery electrode journal July 2023
Exploiting the paddle-wheel mechanism for the design of fast ion conductors journal January 2022
Universal ion-transport descriptors and classes of inorganic solid-state electrolytes journal January 2023
Prospects of halide-based all-solid-state batteries: From material design to practical application journal September 2022
Solid Halide Electrolytes with High Lithium-Ion Conductivity for Application in 4 V Class Bulk-Type All-Solid-State Batteries journal September 2018
Anharmonic Cation–Anion Coupling Dynamics Assisted Lithium‐Ion Diffusion in Sulfide Solid Electrolytes journal October 2022
Lithium superionic conductors with corner-sharing frameworks journal March 2022
Origin of fast ion diffusion in super-ionic conductors journal June 2017
Boosting Solid-State Diffusivity and Conductivity in Lithium Superionic Argyrodites by Halide Substitution journal May 2019
Argyrodite-type advanced lithium conductors and transport mechanisms beyond paddle-wheel effect journal April 2022
From nanoscale interface characterization to sustainable energy storage using all-solid-state batteries journal March 2020
Low-temperature paddlewheel effect in glassy solid electrolytes journal March 2020
Inorganic Solid-State Electrolytes for Lithium Batteries: Mechanisms and Properties Governing Ion Conduction journal December 2015
Emerging Halide Superionic Conductors for All-Solid-State Batteries: Design, Synthesis, and Practical Applications journal April 2022
Phase Transitions of Hybrid Perovskites Simulated by Machine-Learning Force Fields Trained on the Fly with Bayesian Inference journal June 2019
Coupled Cation–Anion Dynamics Enhances Cation Mobility in Room-Temperature Superionic Solid-State Electrolytes journal November 2019
Extreme phonon anharmonicity underpins superionic diffusion and ultralow thermal conductivity in argyrodite Ag8SnSe6 journal May 2023
Rotational Cluster Anion Enabling Superionic Conductivity in Sodium-Rich Antiperovskite Na 3 OBH 4 journal March 2019
Effect of Spin–Orbit Coupling on Phonon-Mediated Magnetic Relaxation in a Series of Zero-Valent Vanadium, Niobium, and Tantalum Isocyanide Complexes journal November 2021
Fast Na diffusion and anharmonic phonon dynamics in superionic Na 3 PS 4 journal January 2021
Anharmonic lattice dynamics and superionic transition in AgCrSe 2 journal February 2020
Superionic Diffusion through Frustrated Energy Landscape journal September 2019
Targeting Superionic Conductivity by Turning on Anion Rotation at Room Temperature in Fast Ion Conductors journal June 2020
Descriptors representing two- and three-body atomic distributions and their effects on the accuracy of machine-learned inter-atomic potentials journal June 2020
Tuning mobility and stability of lithium ion conductors based on lattice dynamics journal January 2018
A lithium superionic conductor journal July 2011
Phonon–Ion Interactions: Designing Ion Mobility Based on Lattice Dynamics journal December 2020
A LaCl3-based lithium superionic conductor compatible with lithium metal journal April 2023
New horizons for inorganic solid state ion conductors journal January 2018
All-solid-state lithium batteries enabled by sulfide electrolytes: from fundamental research to practical engineering design journal January 2021
High-power all-solid-state batteries using sulfide superionic conductors journal March 2016
TaCl5-glassified Ultrafast Lithium Ion-conductive Halide Electrolytes for High-performance All-solid-state Lithium Batteries journal April 2023
Bottleneck of Diffusion and Inductive Effects in Li 10 Ge 1– x Sn x P 2 S 12 journal February 2018
New Oxyhalide Solid Electrolytes with High Lithium Ionic Conductivity >10 mS cm−1for All‐Solid‐State Batteries journal February 2023
Metal Halide Superionic Conductors for All-Solid-State Batteries journal January 2021

Similar Records

Related Subjects