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Title: Atomic Layer Deposition of Al–W–Fluoride on LiCoO2 Cathodes: Comparison of Particle- and Electrode-Level Coatings

Journal Article · · ACS Omega
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  1. Chemical Sciences and Engineering Division and ‡Energy Systems Division, Argonne National Laboratory, Argonne, Illinois 60439, United States

Atomic layer deposition (ALD) of the well-known Al2O3 on a LiCoO2 system is compared with that of a newly developed AlWxFy material. ALD coatings (~1 nm thick) of both materials are shown to be effective in improving cycle life through mitigation of surface-induced capacity losses. However, the behaviors of Al2O3 and AlWxFy are shown to be significantly different when coated directly on cathode particles versus deposition on a composite electrode composed of active materials, carbons, and binders. Electrochemical impedance spectroscopy, galvanostatic intermittent titration techniques, and four-point measurements suggest that electron transport is more limited in LiCoO2 particles coated with Al2O3 compared with that in particles coated with AlWxFy. Here, the results show that proper design/choice of coating materials (e.g., AlWxFy) can improve capacity retention without sacrificing electron transport and suggest new avenues for engineering electrode–electrolyte interfaces to enable high-voltage operation of lithium-ion batteries.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Electrical Energy Storage (CEES)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1371950
Alternate ID(s):
OSTI ID: 1395146
Journal Information:
ACS Omega, Journal Name: ACS Omega Vol. 2 Journal Issue: 7; ISSN 2470-1343
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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