Heteroepitaxial growth of ZnO nanosheet bands on ZnCo2O4 submicron rods toward high-performance Li ion battery electrodes

Chan Woo Lee, Seung Deok Seo, Dong Wook Kim, Sangbaek Park, Kyoungsuk Jin, Dong Wan Kim, Kug Sun Hong

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

We report the direct synthesis of ZnCo2O4 and ZnO/ZnCo2O4 submicron rod arrays grown on Ni foil current collectors via an ammonia-evaporation-induced method by controlling the ratio of Zn to Co. These three-dimensional (3D) hierarchical self-supported nanostructures are composed of one-dimensional (1D) ZnCo2O4 rods and two-dimensional (2D) ZnO nanosheet bands perpendicular to the axis of the each ZnCo2O4 rod. We carefully deal with the heteroepitaxial growth mechanisms of hexagonal ZnO nanosheets from a crystallographic point of view. Furthermore, we demonstrate the ability of these high-surface-area ZnO/ZnCo2O4 heterostructured rods to enable improved electrolyte permeability and Li ion transfer, thereby enhancing their Li storage capability (∼900 mA·h·g-1 at a rate of 45 mA·h·g-1) for Li ion battery electrodes. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)348-355
Number of pages8
JournalNano Research
Volume6
Issue number5
DOIs
Publication statusPublished - 2013 May

Keywords

  • Li ion battery
  • ZnCoO submicron rods
  • ZnO nanosheets
  • ammonia-evaporation-induced method
  • heterostructure
  • hierarchical

ASJC Scopus subject areas

  • Materials Science(all)
  • Electrical and Electronic Engineering

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