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 language | English |
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Pages (from-to) | 348-355 |
Number of pages | 8 |
Journal | Nano Research |
Volume | 6 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2013 May |
Externally published | Yes |
Keywords
- Li ion battery
- ZnO nanosheets
- ammonia-evaporation-induced method
- heterostructure
- hierarchical
ASJC Scopus subject areas
- Materials Science(all)
- Electrical and Electronic Engineering