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Ultrathin ZrO2 on LiNi0.5Mn0.3Co0.2O2 electrode surface via atomic layer deposition for high-voltage operation in lithium-ion batteries

Title
Ultrathin ZrO2 on LiNi0.5Mn0.3Co0.2O2 electrode surface via atomic layer deposition for high-voltage operation in lithium-ion batteries
Author
조국영
Keywords
LiNi0.5Mn0.3Co0.2O2; Prepared electrode; ZrO2; Surface coating; Atomic layer deposition; High-voltage operation
Issue Date
2019-08
Publisher
ELSEVIER SCIENCE BV
Citation
APPLIED SURFACE SCIENCE, v. 484, Page. 701-709
Abstract
High-voltage operation in LiNi0.5Mn0.3Co0.2O2 (NMC532) is an attractive strategy to meet the demands for practical application of high energy density lithium-ion batteries (LIBs). However, a serious problem at high cut-off voltage is the capacity fading during charge-discharge cycling, caused by electrolyte decomposition and dissolution of cathode materials. Herein, we fabricated an ultrathin ZrO2 coating on the surface of the as-prepared NMC532 electrode via atomic layer deposition (ALD) to improve the electrochemical performances of the high-voltage NMC532/graphite system. The capacity retention and rate capability of NMC 532 electrode at high voltage (4.6 V) operation were improved by the ZrO2 coating. Cyclic voltammetry, X-ray photoelectron spectroscopy, and X-ray diffraction analyses of ZrO2-coated NMC532 electrode revealed that the enhanced electrochemical performance was due to the reduced side reaction, structural disordering, and polarization at the cathode surface. Thus, ZrO2 coating of the as-prepared electrode by ALD is a promising technique to maintain the high electrochemical performance of LIBs during high-voltage operations.
URI
https://www.sciencedirect.com/science/article/pii/S0169433219311158https://repository.hanyang.ac.kr/handle/20.500.11754/117865
ISSN
0169-4332; 1873-5584
DOI
10.1016/j.apsusc.2019.04.123
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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