Heteroepitaxial growth of ZnO nanosheet bands on ZnCo204 submicron rods toward high-performance Li ion battery electrodes  

作　　者：Chan Woo Lee Seung-Deok Seo Dong Wook Kim Sangbaek Park Kyoungsuk Jin Dong-Wan Kim Kug Sun Hong 

机构地区：[1]DepartmentofMatefials Science andEngineering, Seoul National University, Seou1151-744, Korea [2]WCU Hybrid Materials Program, Department of Materials Science and Engineering, Seoul National University, Seou1151-744, Korea [3]Department of Material Science and Engineering, Ajou University, Suwon 443-749, Korea [4]Department of Chemistry, Northwestern University, 245 Sheridan Road, Evanston, IL 60208, USA

出　　处：《Nano Research》2013年第5期348-355,共8页纳米研究（英文版）

摘　　要：We report the direct synthesis of ZnC0204 and ZnO/ZnC0204 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） hierar- chical self-supported nanostructures are composed of one-dimensional （1D） ZnCo204 rods and two-dimensional （2D） ZnO nanosheet bands perpendicular to the axis of the each ZnCo204 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/ZnCo204 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.

关 键 词：ZnCo204 submicron rods ZnO nanosheets hierarchicalheterostructure ammonia-evaporation-induced method Li ion battery 

分 类 号：TN304.24[电子电信—物理电子学] TB383[一般工业技术—材料科学与工程]