Abstract
Improving the performance of cathodes by using surface coatings has proven to be an effective method for improving the stability of Li-ion batteries (LIBs), while a high quality film satisfying all requirements of electrochemical inertia, chemical stability, and lithium ion conductivity has not been found. A composite film composed of AI2O3 and AIF3 layers was coated on the surface of Li-rich NMC based electrodes by atomic layer deposition (ALD). The electrochemical characterization results indicated that the coating with 1 cycle of AIF3 ALD on 5 cycles of AI2O3 ALD (1 A1 F3-5AI2O3) significantly improved the cycling stability and alleviated the voltage attenuation problem of Li-rich NMC based electrodes by suppressing side reactions between the electrolyte and electrode, as well as inhibiting the transformation of layered Li2MnO3 into a spinel-like phase.
Recommended Citation
X. Liang and H. Yu, "Fluorination of Al₂O₃ Coating for Lithium-Ion Battery,", Jan 2021.
Department(s)
Chemical and Biochemical Engineering
Patent Application Number
PCT/US2020/032299
Patent Number
WO2020251710A3
Document Type
Patent
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2021 Curators of the University of Missouri, All rights reserved.
Publication Date
21 Jan 2021
Comments
Application filed by The Curators Of The University Of Missouri