纳米氧化钴电极材料的制备与电子显微学表征
刘辉辉，贾双凤，盛华平，郑 赫，王建波*
（武汉大学物理科学与技术学院，电子显微镜中心和人工微结构教育部重点实验室，湖北 武汉430072）
摘要：通过模板水热法合成了氧化钴（CoO）纳米材料。用透射电子显微镜观察发现样品中CoO为岩盐立方结构，以纳米线的形态存在，每根纳米线均由尺寸在30~100 nm的纳米颗粒附着而成。同时，实验产物中也存在一些Co单质。Co单质以纳米手指的形态存在，且多数具有孪晶结构，孪晶面为{111}。Co孪晶的生成归因于高温高压的反应条件，同时Co单质的存在增强了CoO作为电极材料的导电性能。
关键词：氧化钴；钴孪晶；模板水热法；电子显微学
中图分类号：TB383；TG146.1+6；TG115.21+5.3 文献标识码：A doi:10.3969/j.1000-6281.2015-04.001
Synthesis and electron microscopy characterization of CoO nanomaterial
LIU Hui-hui，JIA Shuang-feng，SHENG Hua-ping，ZHENG He，WANG Jian-bo*
(School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan Hubei 430072, China)
Abstract：In this paper, Cobalt Oxide (CoO) nanomaterial was synthesized by template hydrothermal method. Transmission electron microscopy observation proved that the CoO had rock-salt cubic structures which were in the form of nanoparticles-consisted nanowires. Meanwhile, the microstructure of the Co byproduct was also investigated in detail. Most of the Co were in nanofinger-shape, having the {111} twinning plane. The high temperature and high pressure were supposed to be responsible for the generation of the Co twinning. The conductivity of CoO electrode material was improved by the existence of Co.
Keywords: cobalt oxide；Co twinning；template hydrothermal method；transmission electron microscopy
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