纳米棒
纳米线
高分辨率透射电子显微镜
纳米材料
热液循环
纳米结构
化学
纳米技术
水热合成
阴极
化学工程
表征(材料科学)
微观结构
分解
电化学
透射电子显微镜
材料科学
结晶学
电极
物理化学
有机化学
工程类
作者
Fangyi Cheng,Jianzhi Zhao,Wene Song,Chunsheng Li,Hua Ma,Jun Chen,Pan‐Wen Shen
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2006-02-02
卷期号:45 (5): 2038-2044
被引量:487
摘要
In this paper, MnO2 nanomaterials of different crystallographic types and crystal morphologies have been selectively synthesized via a facile hydrothermal route and electrochemically investigated as the cathode active materials of primary and rechargeable batteries. Beta-MnO2 nano/microstructures, including one-dimensional (1-D) nanowires, nanorods, and nanoneedles, as well as 2-D hexagramlike and dendritelike hierarchical forms, were obtained by simple hydrothermal decomposition of an Mn(NO3)2 solution under controlled reaction conditions. Alpha- and gamma-MnO2 nanowires and nanorods were also prepared on the basis of previous literature. The as-synthesized samples were characterized by instrumental analyses such as XRD, SEM, TEM, and HRTEM. Furthermore, the obtained 1-D alpha- and gamma-MnO2 nanostructures were found to exhibit favorable discharge performance in both primary alkaline Zn-MnO2 cells and rechargeable Li-MnO2 cells, showing their potential applications in high-energy batteries.
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