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Chemomechanically Stable Ultrahigh-Ni Single-Crystalline Cathodes with Improved Oxygen Retention and Delayed Phase Degradations

Journal Article · · Nano Letters
The pressing demand in electrical vehicle (EV) markets for high-energy-density lithium-ion batteries (LIBs) requires further increasing the Ni content in high-Ni and low-Co cathodes. However, the commercialization of high-Ni cathodes is hindered by their intrinsic chemomechanical instabilities and fast capacity fade. The emerging single-crystalline strategy offers a promising solution, yet the operation and degradation mechanism of single-crystalline cathodes remain elusive, especially in the extremely challenging ultrahigh-Ni (Ni > 90%) regime whereby the phase transformation, oxygen loss, and mechanical instability are exacerbated with increased Ni content. Herein, we decipher the atomic-scale stabilization mechanism controlling the enhanced cycling performance of an ultrahigh-Ni single-crystalline cathode. We find that the charge/discharge inhomogeneity, the intergranular cracking, and oxygen-loss-related phase degradations that are prominent in ultrahigh-Ni polycrystalline cathodes are considerably suppressed in their single-crystalline counterparts, leading to improved chemomechanical and cycling stabilities of the single-crystalline cathodes. Furthermore, our work offers important guidance for designing next-generation single-crystalline cathodes for high-capacity, long-life LIBs.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Fuel Cell Technologies Office; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357; EE0008444; SC0012704; SC0021204
OSTI ID:
1835309
Alternate ID(s):
OSTI ID: 1870393
OSTI ID: 1887546
Report Number(s):
BNL-223025-2022-JAAM; BNL-223311-2022-JAAM; 172322
Journal Information:
Nano Letters, Journal Name: Nano Letters Journal Issue: 22 Vol. 21; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (39)

High‐Voltage Charging‐Induced Strain, Heterogeneity, and Micro‐Cracks in Secondary Particles of a Nickel‐Rich Layered Cathode Material journal March 2019
High-Rate Oxygen Evolution Reaction on Al-Doped LiNiO 2 journal August 2015
High‐Nickel NMA: A Cobalt‐Free Alternative to NMC and NCA Cathodes for Lithium‐Ion Batteries journal July 2020
Polycrystalline and Single Crystalline NCM Cathode Materials—Quantifying Particle Cracking, Active Surface Area, and Lithium Diffusion journal March 2021
Disintegration of Meatball Electrodes for LiNi x Mn y Co z O2 Cathode Materials journal May 2017
Electrochemical performances of LiNiO2 substituted by Ti for Ni via the combustion method journal August 2014
Single-crystal nickel-rich layered-oxide battery cathode materials: synthesis, electrochemistry, and intra-granular fracture journal May 2020
Preparation and characteristics of Sb-doped LiNiO2 cathode materials for Li-ion batteries journal July 2011
Effect of Mg-doping on the degradation of LiNiO2-based cathode materials by combined spectroscopic methods journal May 2012
Well-dispersed single-crystalline nickel-rich cathode for long-life high-voltage all-solid-state batteries journal October 2021
Resolving atomic-scale phase transformation and oxygen loss mechanism in ultrahigh-nickel layered cathodes for cobalt-free lithium-ion batteries journal June 2021
Crack-free single-crystalline Ni-rich layered NCM cathode enable superior cycling performance of lithium-ion batteries journal April 2020
Mesoscale Chemomechanical Interplay of the LiNi 0.8 Co 0.15 Al 0.05 O 2 Cathode in Solid-State Polymer Batteries journal December 2018
Dopant Distribution in Co-Free High-Energy Layered Cathode Materials journal November 2019
Decreasing Li/Ni Disorder and Improving the Electrochemical Performances of Ni-Rich LiNi 0.8 Co 0.1 Mn 0.1 O 2 by Ca Doping journal June 2017
Atomic-Scale Observation of O1 Faulted Phase-Induced Deactivation of LiNiO 2 at High Voltage journal April 2021
Oxygen Release Induced Chemomechanical Breakdown of Layered Cathode Materials journal April 2018
Structural and Electrochemical Impacts of Mg/Mn Dual Dopants on the LiNiO 2 Cathode in Li-Metal Batteries journal March 2020
Co-Free Layered Cathode Materials for High Energy Density Lithium-Ion Batteries journal May 2020
Rock-Salt Growth-Induced (003) Cracking in a Layered Positive Electrode for Li-Ion Batteries journal October 2017
Self-Passivation of a LiNiO 2 Cathode for a Lithium-Ion Battery through Zr Doping journal June 2018
Intragranular cracking as a critical barrier for high-voltage usage of layer-structured cathode for lithium-ion batteries journal January 2017
Surface reconstruction and chemical evolution of stoichiometric layered cathode materials for lithium-ion batteries journal March 2014
Coupling of electrochemically triggered thermal and mechanical effects to aggravate failure in a layered cathode journal June 2018
Anomalous metal segregation in lithium-rich material provides design rules for stable cathode in lithium-ion battery journal April 2019
Surface regulation enables high stability of single-crystal lithium-ion cathodes at high voltage journal June 2020
Hierarchical nickel valence gradient stabilizes high-nickel content layered cathode materials journal April 2021
Tailoring grain boundary structures and chemistry of Ni-rich layered cathodes for enhanced cycle stability of lithium-ion batteries journal June 2018
High-nickel layered oxide cathodes for lithium-based automotive batteries journal January 2020
Understanding Co roles towards developing Co-free Ni-rich cathodes for rechargeable batteries journal February 2021
Injection of oxygen vacancies in the bulk lattice of layered cathodes journal April 2019
TEMImageNet training library and AtomSegNet deep-learning models for high-precision atom segmentation, localization, denoising, and deblurring of atomic-resolution images journal March 2021
Suppressing detrimental phase transitions via tungsten doping of LiNiO 2 cathode for next-generation lithium-ion batteries journal January 2019
Enhancing surface oxygen retention through theory-guided doping selection in Li 1−x NiO 2 for next-generation lithium-ion batteries journal January 2020
PyXAS – an open-source package for 2D X-ray near-edge spectroscopy analysis journal February 2020
Reversible planar gliding and microcracking in a single-crystalline Ni-rich cathode journal December 2020
Synthesis of Single Crystal LiNi 0.5 Mn 0.3 Co 0.2 O 2 for Lithium Ion Batteries journal January 2017
Synthesis of Single Crystal LiNi 0.88 Co 0.09 Al 0.03 O 2  with a Two-Step Lithiation Method journal January 2019
Synthesis of Single Crystal LiNi 0.6 Mn 0.2 Co 0.2 O 2 with Enhanced Electrochemical Performance for Lithium Ion Batteries journal January 2018