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Title: Atomic Layer Deposition of Al–W–Fluoride on LiCoO 2 Cathodes: Comparison of Particle- and Electrode-Level Coatings

Atomic layer deposition (ALD) of the well-known Al 2O 3 on a LiCoO 2 system is compared with that of a newly developed AlW xF y 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 Al 2O 3 and AlW xF y 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 LiCoO 2 particles coated with Al 2O 3 compared with that in particles coated with AlW xF y. Here, the results show that proper design/choice of coating materials (e.g., AlW xF y) 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.
Authors:
 [1] ;  [1] ;  [1] ; ORCiD logo [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Published Article
Journal Name:
ACS Omega
Additional Journal Information:
Journal Volume: 2; Journal Issue: 7; Journal ID: ISSN 2470-1343
Publisher:
American Chemical Society (ACS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Electrical Energy Storage (CEES)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Atomic Layer Deposition; Coatings; Lithium Ion Batteries; Metal Fluoride; Metal Oxide; Analytical chemistry; Batteries; Composites; Deposition process; Electric properties; Electric transport processes and properties; Electrode-electrolyte interface; Thin films
OSTI Identifier:
1371950
Alternate Identifier(s):
OSTI ID: 1395146