NDLI: Atomic layer deposition of solid-state electrolyte coated cathode materials with superior high-voltage cycling behavior for lithium ion battery application

Content Provider	Royal Society of Chemistry (RSC)
Author	Cai, Mei Liu, Jian Li, Xifei Banis, Mohammad Norouzi Lushington, Andrew Li, Ruying Sun, Xueliang
Copyright Year	2014
Abstract	LiNi1/3Co1/3Mn1/3O2 (NMC) is a highly promising cathode material for use in lithium ion batteries; unfortunately, its poor cycling performance at high cutoff voltages hinders its commercialization. In this study, for the first time, we employ atomic layer deposition (ALD) to coat lithium tantalum oxide, a solid-state electrolyte, with varying thicknesses on NMC in an attempt to improve battery performance. Our results indicate that utilization of a solid-state electrolyte as a coating material for NMC significantly improves performance at high cutoff voltages but is strongly dependent on coating thicknesses. Our investigation revealed that a thicker coating proved to be beneficial in preventing cathode material dissolution into the electrolyte and aided in maintaining the microstructure of NMC. Consequently, a thicker ALD coating resulted in increased electrochemical impedance of the cathode. The results of this study indicate that an optimized coating thickness is needed in order to strike a balance between maintaining structural stability while minimizing electrochemical impedance. The coating thicknesses are functionally specific, and for the best improvement of a cathode, a particular coating thickness should be sought.
Starting Page	768
Ending Page	778
Page Count	11
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	7
Issue Number	2
Journal	Energy & Environmental Science
DOI	10.1039/c3ee42704h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	NMC Cathode Ion Atomic layer deposition Lithium Tantalum Electrolyte Electrochemistry Electrical impedance
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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