Heteroepitaxial Growth of ZnO Nanosheet Bands on ZnCo2O4 Submicron Rods toward High-Performance Li Ion Battery Electrodes

Title
Heteroepitaxial Growth of ZnO Nanosheet Bands on ZnCo2O4 Submicron Rods toward High-Performance Li Ion Battery Electrodes
Authors
박상백이찬우서승덕김동욱진경석김동완홍국선
Issue Date
2013-05
Publisher
Nano research
Citation
VOL 6, NO 5-355
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 (similar to 900 mA center dot h center dot g(-1) at a rate of 45 mA center dot h center dot g(-1)) for Li ion battery electrodes.
URI
http://pubs.kist.re.kr/handle/201004/71229
ISSN
1998-0124
Appears in Collections:
KIST Publication > Article
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