Recovery of Degraded Ni-Rich NMC811 Particles for Lithium-Ion Batteries

Author

Han Yu
Yan Gao
James Kirtley
Gabriel Borgmeyer
Xiaoqing He
Xinhua Liang, Missouri University of Science and TechnologyFollow

Abstract

Nickel-rich cathode materials attract a lot of attention due to their high energy density. However, their sensitivity to air and moisture hinders their practical applications. Exposing Ni-rich NMC in the air will produce by-products that are not conducive to lithium-ion transmission. Water washing can be used to remove by-products on the surface, but it can also introduce new problems, such as the generation of NiO on the particle surface, which will reduce the electrochemical performance of the material. In this study, Al₂O₃atomic layer deposition (ALD) was applied on degraded NMC811 particles to recover the electrochemical performance of the degraded NMC811 particles, which had been exposed to moisture. XPS and XRD analysis verified that the Al₂O₃ALD coating removed the contaminant components on the particle surface, such as LiOH and Li₂CO₃, as well as reactivation of inactive Ni due to reaction with moisture. Furthermore, the coating film can also inhibit side reactions during the charge and discharge process and enhance the cycling stability.

Recommended Citation

H. Yu et al., "Recovery of Degraded Ni-Rich NMC811 Particles for Lithium-Ion Batteries," Journal of the Electrochemical Society, vol. 169, no. 5, article no. 050520, The Electrochemical Society, May 2022.

The definitive version is available at https://doi.org/10.1149/1945-7111/ac6c56

Department(s)

Chemical and Biochemical Engineering

Comments

Missouri University of Science and Technology, Grant None

International Standard Serial Number (ISSN)

1945-7111; 0013-4651

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2023 The Electrochemical Society, All rights reserved.

Publication Date

01 May 2022