One-nanometer-precision control of Al2O3 nanoshells through a solution-based synthesis route

Wei Zhang, Zi-Xiang Chi, Wen-Xin Mao, Rong-Wen Lv, An-Min Cao, Li-Jun Wan

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74 Citations (Scopus)

Abstract

Forming uniform metal oxide nanocoatings is a well-known challenge in the construction of core-shell type nanomaterials. Herein, by using buffer solution as a specific reaction medium, we demonstrate the possibility to grow thin nanoshells of metal oxides, typically Al2O3, on different kinds of core materials, forming a uniform surface-coating layer with thicknesses achieving one nanometer precision. The application of this methodology for the surface modification of LiCoO2 shows that a thin nanoshell of Al2O3 can be readily tuned on the surface for an optimized battery performance. Uniform surface coatings of Al2O3 with a thickness controllable at the one nanometer level were achieved by a solution-based synthesis route. Application of this coating methodology to LiCoO2 showed that its battery performance as a cathode material can be optimized by means of systematic surface control.

Original languageEnglish
Pages (from-to)12776-12780
Number of pages5
JournalAngewandte Chemie - International Edition
Volume53
Issue number47
DOIs
Publication statusPublished - 17 Nov 2014
Externally publishedYes

Keywords

  • AlO coating
  • core-shell structure
  • layer thickness
  • lithium-ion batteries

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