Effects of atomic layer deposition of Al2O3 on the LiLi0.20Mn0.54Ni0.13Co0.13O 2 cathode for lithium-ion batteries

Yoon Seok Jung, Andrew S. Cavanagh, Yanfa Yan, Steven M. George, Arumugam Manthiram

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105 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)A1298-A1302
JournalJournal of the Electrochemical Society
Volume158
Issue number12
DOIs
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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