AlF₃-Al₂O₃ ALD Thin-Film-Coated Li₁.₂Mn₀.₅₄Co₀.₁₃Ni₀.₁₃O₂ Particles for Lithium-Ion Batteries: Long-Term Protection

Abstract

Improving the performance of existing cathode materials of lithium-ion batteries (LIBs) through surface modification has been proven to be an effective way to improve the performance of LIBs. However, it is a challenge to use a traditional method to prepare an effective coating film, which meets the requirements of uniformity, continuity, electrochemical stability, and strong mechanical properties. In this study, an ultrathin AlF3-Al2O3 film was coated on the surface of Li1.2Mn0.54Co0.13Ni0.13O2 (LRNMC) particles by atomic layer deposition (ALD) in a fluidized bed reactor. A cathode electrolyte interphase layer mainly composed of inorganic components was formed on the surface of AlF3-Al2O3-coated LRNMC during the charge/discharge cycling process, which led to the enhancement of capacity and cycling stability. In addition, the coating layer significantly increased the shelf life of the cathode particles. For LRNMC particles with one cycle of Al2O3 ALD and one cycle of AlF3 ALD coatings, there was no obvious degradation of electrochemical performance after being stored for more than 1 year, indicating long-term protection of ALD films for LIB cathode particles.

Department(s)

Chemical and Biochemical Engineering

Comments

This work was supported in part by the National Science Foundation, United States [grant NSF DMR 1464111] and Linda and Bipin Doshi endowment of Missouri University of Science and Technology.

Keywords and Phrases

AlF Coating 3; Atomic Layer Deposition; Cathode Electrolyte Interphase; Lithium-Ion Battery; Surface Coating

International Standard Serial Number (ISSN)

1944-8252; 1944-8244

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2022 American Chemical Society (ACS), All rights reserved.

Publication Date

26 Jan 2022

PubMed ID

35025193

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