Heteroepitaxial Growth of ZnO Nanosheet Bands on ZnCo2O4 Submicron Rods toward High-Performance Li Ion Battery Electrodes
- Heteroepitaxial Growth of ZnO Nanosheet Bands on ZnCo2O4 Submicron Rods toward High-Performance Li Ion Battery Electrodes
- 박상백; 이찬우; 서승덕; 김동욱; 진경석; 김동완; 홍국선
- Issue Date
- Nano research
- VOL 6, NO 5-355
- 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.
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