Chen Xiangping, Duan Huanan, Zhou Zhentao, Liang Jianyu, Gnanaraj Joe
College of Material Science and Technology, South Central University of Technology, Guangzhou, Guangdong 510640, People's Republic of China. Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA.
Nanotechnology. 2008 Sep 10;19(36):365306. doi: 10.1088/0957-4484/19/36/365306. Epub 2008 Jul 25.
Free-standing Cu nanorod arrays on Cu foil have been fabricated by a template-assisted method. Cu nanorods were potentiostatically deposited on mechanically polished Cu foil using anodized aluminum oxide templates as the deposition mask. Three electrolyte systems were compared, including two acid copper sulfate based solutions and one alkaline solution. The most uniform nanorods were achieved in the alkaline electrolyte. The weight gain per unit area after electrodeposition has been used as a direct measure of average length of deposited Cu nanorods. It was found that our control over the uniformity in nanorod length across the array is important in reaching the maximized aspect ratio without aggregation. Through controlling the weight change it was possible to control the aspect ratio of nanorods and to avoid aggregation of nanorods. Our capability to fabricate free-standing Cu nanorod arrays of uniform height with maximized aspect ratio on Cu foil is especially important in applying this nanostructured Cu as a current collector in Li ion batteries.
通过模板辅助法在铜箔上制备了独立的铜纳米棒阵列。以阳极氧化铝模板作为沉积掩膜，在机械抛光的铜箔上恒电位沉积铜纳米棒。比较了三种电解质体系，包括两种基于酸性硫酸铜的溶液和一种碱性溶液。在碱性电解质中获得了最均匀的纳米棒。电沉积后单位面积的重量增加被用作沉积铜纳米棒平均长度的直接度量。结果发现，在阵列中对纳米棒长度的均匀性进行控制对于在不发生聚集的情况下达到最大长径比很重要。通过控制重量变化，可以控制纳米棒的长径比并避免纳米棒聚集。我们在铜箔上制备具有最大长径比的均匀高度的独立铜纳米棒阵列的能力在将这种纳米结构的铜用作锂离子电池的集流体方面尤为重要。
