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Title: Impact of Microcrack Generation and Surface Degradation on a Nickel-Rich Layered Li[Ni0.9Co0.05Mn0.05]O2 Cathode for Lithium-Ion Batteries

Journal Article · · Chemistry of Materials
 [1]; ORCiD logo [2]
  1. Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program and Texas Materials Institute; University of Texas at Austin
  2. Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program and Texas Materials Institute
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In this work, to address the growing demand for energy density, the Ni-rich layered [Ni0.90Co0.05Mn0.05]O2 cathode has been synthesized and its electrochemical performance in lithium-ion cells has been benchmarked against a lower-Ni content Li[Ni0.6Co0.2Mn0.2]O2 cathode. Li[Ni0.90Co0.05Mn0.05]O2 delivers a high discharge capacity of 227 mA h g-1 compared to a capacity of 189 mA h g-1 for Li[Ni0.6Co0.2Mn0.2]O2 when cycled up to a lower cutoff voltage of 4.3 V, making it an appealing candidate for electric vehicles. With an increase in the charge cutoff voltage to 4.5 V, Li[Ni0.90Co0.05Mn0.05]O2 displays a capacity of 238 mA h g-1 compared to a capacity of 208 mA h g-1 for Li[Ni0.6Co0.2Mn0.2]O2. Although Li[Ni0.90Co0.05Mn0.05]O2 suffers during cycling from the usual rapid capacity fade in a manner similar to that of LiNiO2, 87 and 81% of the initial capacity could still be retained after 100 cycles even after cycling to higher cutoff voltages of 4.3 and 4.5 V, respectively. A comparison of Li[Ni0.90Co0.05Mn0.05]O2 and Li[Ni0.6Co0.2Mn0.2]O2 reveals that the capacity fade of Li[Ni0.90Co0.05Mn0.05]O2 originates largely from the anisotropic volume change and subsequent microcrack propagation in the bulk and NiO-like rock salt impurity phase formation on the particle surface, which are exacerbated at 4.5 V. Lastly, future work with appropriate doping and surface modification could improve further the performance of Li[Ni0.90Co0.05Mn0.05]O2.

Research Organization:
Univ. of Texas, Austin, TX (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
EE0007762
OSTI ID:
1430488
Journal Information:
Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 19 Vol. 29; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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High‐Voltage Charging‐Induced Strain, Heterogeneity, and Micro‐Cracks in Secondary Particles of a Nickel‐Rich Layered Cathode Material journal March 2019
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Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies journal December 2019
Improved Cycling Stability of Li[Ni 0.90 Co 0.05 Mn 0.05 ]O 2 Through Microstructure Modification by Boron Doping for Li-Ion Batteries journal July 2018
Controllable Cathode–Electrolyte Interface of Li[Ni 0.8 Co 0.1 Mn 0.1 ]O 2 for Lithium Ion Batteries: A Review journal August 2019
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There and Back Again-The Journey of LiNiO 2 as a Cathode Active Material journal May 2019
In‐Depth TEM Investigation on Structural Inhomogeneity within a Primary Li x Ni 0.835 Co 0.15 Al 0.015 O 2 Particle: Origin of Capacity Decay during High‐Rate Discharge journal February 2020
Preparation, Lithium Storage Performance and Thermal Stability of Nickel-Rich Layered LiNi 0.815 Co 0.15 Al 0.035 O 2 /RGO Composites journal August 2018
New Insights for the Abuse Tolerance Behavior of LiMn 2 O 4 under High Cut‐Off Potential Conditions journal September 2018
Mechanistic understanding of intergranular cracking in NCM cathode material: mesoscale simulation with three-dimensional microstructure journal January 2018
Chemomechanical behaviors of layered cathode materials in alkali metal ion batteries journal January 2018
Single-crystal based studies for correlating the properties and high-voltage performance of Li[Ni x Mn y Co 1−x−y ]O 2 cathodes journal January 2019
Overall structural modification of a layered Ni-rich cathode for enhanced cycling stability and rate capability at high voltage journal January 2019
Indirect state-of-charge determination of all-solid-state battery cells by X-ray diffraction journal January 2019
Ni-Rich Oxide LiNi 0.85 Co 0.05 Mn 0.1 O 2 for Lithium Ion Battery: Effect of Microwave Radiation on Its Morphology and Electrochemical Property journal January 2019
Probing the Nature of Li + /Ni 2+ Disorder on the Structure and Electrochemical Performance in Ni-Based Layered Oxide Cathodes journal January 2019
Laboratory-Based X-ray Absorption Spectroscopy on a Working Pouch Cell Battery at Industrially-Relevant Charging Rates journal January 2019
The Role of Electrolyte in the First-Cycle Transformations of LiNi 0.6 Mn 0.2 Co 0.2 O 2 journal January 2019
Indirect state-of-charge determination of all-solid-state battery cells by X-ray diffraction text January 2019
Mechanism of Capacity Fading in the LiNi0.8Co0.1Mn0.1O2 Cathode Material for Lithium-Ion Batteries journal April 2019
Chemical, Structural, and Electronic Aspects of Formation and Degradation Behavior on Different Length Scales of Ni‐Rich NCM and Li‐Rich HE‐NCM Cathode Materials in Li‐Ion Batteries text January 2019
Indirect state-of-charge determination of all-solid-state battery cells by X-ray diffraction text January 2019

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