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Jung, Yoon Seok
Electrochemical Solid-State Energy Storage Lab
Research Interests
  • Batteries, All-solid-state batteries, solid electrolytes, electrodes, atomic layer deposition,energy storage devices

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Effects of Atomic Layer Deposition of Al2O3 on the Li[Li0.20Mn0.54Ni0.13Co0.13]O-2 Cathode for Lithium-Ion Batteries

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Title
Effects of Atomic Layer Deposition of Al2O3 on the Li[Li0.20Mn0.54Ni0.13Co0.13]O-2 Cathode for Lithium-Ion Batteries
Author
Jung, Yoon SeokCavanagh, Andrew S.Yan, YanfaGeorge, Steven M.Manthiram, Arumugam
Keywords
COMPOSITE ELECTRODES; SURFACE-CHEMISTRY; CAPACITY; CELL
Issue Date
2011-11
Publisher
ELECTROCHEMICAL SOC INC
Citation
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.158, no.12, pp.A1298 - A1302
Abstract
The lithium-excess layered oxide LiLi0.2Mn0.54Ni 0.13Co0.13O2 has been surface modified with Al2O3 films grown with atomic layer deposition (ALD) and examined as cathodes for lithium-ion batteries. Al2O3 was grown on powders prior to electrode fabrication, directly on the electrode, and directly on the electrode followed by a heat-treatment at 300C in air. Compared to the bare electrode, an Al2O3 film on an as-formed electrode improved the cycle performance significantly. Furthermore, the heat treatment of the ALD-coated electrodes result in significant increase in capacity, due to the transformation of the as-deposited Al2O 3 to a better Li™-conductive material. X-ray photoelectron spectroscopy (XPS) results indicate that the heat-treatment leads to an inter-diffusion of atoms between the Al2O3 coating and the LiLi0.20Mn0.54Ni0.13Co0.13O 2 core. © 2011 The Electrochemical Society.
URI
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DOI
10.1149/2.030112jes
ISSN
0013-4651
Appears in Collections:
ECHE_Journal Papers
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