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Expandable Li Percolation Network: The Effects of Site Distortion in Cation-Disordered Rock-Salt Cathode Material

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.3c02041· OSTI ID:2251629
Cation-disordered rock-salt (DRX) materials receive intensive attention as a new class of cathode candidates for high-capacity lithium-ion batteries (LIBs). Unlike traditional layered cathode materials, DRX materials have a three-dimensional (3D) percolation network for Li+ transportation. The disordered structure poses a grand challenge to a thorough understanding of the percolation network due to its multiscale complexity. In this work, we introduce the large supercell modeling for DRX material Li1.16Ti0.37Ni0.37Nb0.10O2 (LTNNO) via the reverse Monte Carlo (RMC) method combined with neutron total scattering. Here, through a quantitative statistical analysis of the material’s local atomic environment, we experimentally verified the existence of short-range ordering (SRO) and uncovered an element-dependent behavior of transition metal (TM) site distortion. A displacement from the original octahedral site for Ti4+ cations is pervasive throughout the DRX lattice. Density functional theory (DFT) calculations revealed that site distortions quantified by the centroid offsets could alter the migration barrier for Li+ diffusion through the tetrahedral channels, which can expand the previously proposed theoretical percolating network of Li. The estimated accessible Li content is highly consistent with the observed charging capacity. The newly developed characterization method here uncovers the expandable nature of the Li percolation network in DRX materials, which may provide valuable guidelines for the design of superior DRX materials.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2251629
Journal Information:
Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 21 Vol. 145; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (55)

Evolution of Local Structural Ordering and Chemical Distribution upon Delithiation of a Rock Salt–Structured Li 1.3 Ta 0.3 Mn 0.4 O 2 Cathode journal February 2019
Disordered Lithium-Rich Oxyfluoride as a Stable Host for Enhanced Li + Intercalation Storage journal February 2015
Another Strategy, Detouring Potential Decay by Fast Completion of Cation Mixing journal February 2018
Understanding Performance Degradation in Cation‐Disordered Rock‐Salt Oxide Cathodes journal July 2019
Effect of Fluorination on Lithium Transport and Short‐Range Order in Disordered‐Rocksalt‐Type Lithium‐Ion Battery Cathodes journal March 2020
Thermodynamically Driven Synthetic Optimization for Cation‐Disordered Rock Salt Cathodes journal April 2022
Stabilizing the Oxygen Lattice and Reversible Oxygen Redox Chemistry through Structural Dimensionality in Lithium-Rich Cathode Oxides journal February 2019
Role of Redox‐Inactive Transition‐Metals in the Behavior of Cation‐Disordered Rocksalt Cathodes journal May 2020
Understanding the Effect of Local Short-Range Ordering on Lithium Diffusion in Li1.3Nb0.3Mn0.4O2 Single-Crystal Cathode journal September 2018
Design Principles for High-Capacity Mn-Based Cation-Disordered Rocksalt Cathodes journal January 2020
A disordered rock-salt Li-excess cathode material with high capacity and substantial oxygen redox activity: Li 1.25 Nb 0.25 Mn 0.5 O 2 journal November 2015
Structural and mechanistic revelations on high capacity cation-disordered Li-rich oxides for rechargeable Li-ion batteries journal January 2019
Study of atomic ordering across the layer in lithium-rich layered positive electrode material towards preparation process optimization journal October 2019
Activation and stabilization mechanisms of anionic redox for Li storage applications: Joint experimental and theoretical study on Li2TiO3–LiMnO2 binary system journal July 2020
A new model on cation distribution in cation-disordered Li1+xTM1−xO2 cathodes journal August 2020
The Impact of Surface Structure Transformations on the Performance of Li-Excess Cation-Disordered Rocksalt Cathodes journal September 2020
Short-Range Order and Unusual Modes of Nickel Redox in a Fluorine-Substituted Disordered Rocksalt Oxide Lithium-Ion Cathode journal September 2018
Computational Investigation and Experimental Realization of Disordered High-Capacity Li-Ion Cathodes Based on Ni Redox journal March 2019
Degradation Mechanisms in Li 2 VO 2 F Li-Rich Disordered Rock-Salt Cathodes journal June 2019
Mn 4+ -Substituted Li-Rich Li 1.2 Mn 0.4 3+ Mn x 4+ Ti 0.4– x O 2 Materials with High Energy Density journal August 2020
Elucidating and Mitigating the Degradation of Cationic–Anionic Redox Processes in Li 1.2 Mn 0.4 Ti 0.4 O 2 Cation-Disordered Cathode Materials journal November 2019
Reversible Three-Electron Redox Reaction of Mo 3+ /Mo 6+ for Rechargeable Lithium Batteries journal March 2017
Distortions in Octahedrally Coordinated d 0 Transition Metal Oxides:  A Continuous Symmetry Measures Approach journal July 2006
Probing the Local Site Disorder and Distortion in Pyrochlore High-Entropy Oxides journal December 2020
Unraveling the Nature and Role of Layered Cation Ordering in Cation-Disordered Rock-Salt Cathodes journal October 2022
Structural Modeling of Porous Carbons:  Constrained Reverse Monte Carlo Method journal September 2003
Molecular Modeling of Porous Carbons Using the Hybrid Reverse Monte Carlo Method journal November 2006
Modeling Structural Morphology of Microporous Carbons by Reverse Monte Carlo journal June 2000
Structural modelling of glasses using reverse Monte Carlo simulation journal March 1990
Origin of stabilization and destabilization in solid-state redox reaction of oxide ions for lithium-ion batteries journal December 2016
A new active Li–Mn–O compound for high energy density Li-ion batteries journal November 2015
Mitigating oxygen loss to improve the cycling performance of high capacity cation-disordered cathode materials journal October 2017
Hidden structural and chemical order controls lithium transport in cation-disordered oxides for rechargeable batteries journal February 2019
Non-topotactic reactions enable high rate capability in Li-rich cathode materials journal May 2021
Cation-disordered rocksalt-type high-entropy cathodes for Li-ion batteries journal October 2020
Reversible Mn2+/Mn4+ double redox in lithium-excess cathode materials journal April 2018
Li + intercalation in isostructural Li 2 VO 3 and Li 2 VO 2 F with O 2− and mixed O 2− /F anions journal January 2015
A new class of high capacity cation-disordered oxides for rechargeable lithium batteries: Li–Ni–Ti–Mo oxides journal January 2015
Lithium manganese oxyfluoride as a new cathode material exhibiting oxygen redox journal January 2018
Nanostructured Li 2 MnO 3 : a disordered rock salt type structure for high energy density Li ion batteries journal January 2017
The atomic structure of a MgCo2O4 nanoparticle for a positive electrode of a Mg rechargeable battery journal January 2019
Investigation of the exceptional charge performance of the 0.93Li 4−x Mn 2 O 5 –0.07Li 2 O composite cathode for Li-ion batteries journal January 2018
Metastable and nanosize cation-disordered rocksalt-type oxides: revisit of stoichiometric LiMnO 2 and NaMnO 2 journal January 2018
Improving the oxygen redox stability of NaCl-type cation disordered Li 2 MnO 3 in a composite structure of Li 2 MnO 3 and spinel-type LiMn 2 O 4 journal January 2019
Short-range ordering in a battery electrode, the ‘cation-disordered’ rocksalt Li 1.25 Nb 0.25 Mn 0.5 O 2 journal January 2019
Improved cycling stability in high-capacity Li-rich vanadium containing disordered rock salt oxyfluoride cathodes journal January 2019
Effect of transition metal cations on the local structure and lithium transport in disordered rock-salt oxides journal January 2022
Li trapping in nanolayers of cation ‘disordered’ rock salt cathodes journal January 2022
High-capacity electrode materials for rechargeable lithium batteries: Li 3 NbO 4 -based system with cation-disordered rocksalt structure journal June 2015
Reverse Monte Carlo Simulation: A New Technique for the Determination of Disordered Structures journal December 1988
Reverse Monte Carlo modelling journal November 2001
Reverse Monte Carlo modelling of crystalline disorder journal January 2005
Electronic-Structure Origin of Cation Disorder in Transition-Metal Oxides journal October 2017
Unlocking the Potential of Cation-Disordered Oxides for Rechargeable Lithium Batteries journal January 2014
Metastable and Nanosized Li1.2Nb0.2V0.6O2 for High-Energy Li-ion Batteries journal March 2022