Hu W K, Gao X P, Geng M M, Gong Z X, Noréus D
Department of Structural Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden.
J Phys Chem B. 2005 Mar 31;109(12):5392-4. doi: 10.1021/jp044514m.
Studies on nanoscale materials have received great interest in both fundamental and applied aspects in recent years. In this letter, we report the synthesis of CoOOH nanorods and their possible applications as coating materials on nickel hydroxide for high-temperature nickel-metal hydride (Ni-MH) cells. The morphology and structure of CoOOH nanorods and coated nickel hydroxide particles are investigated by transmission electron microscopy, X-ray diffraction, and scanning electron microscopy, respectively. The electrochemical properties in the cylindrical AA size Ni-MH cells are evaluated. Our results show that the Ni-MH cells, where the positive electrodes are composed of such nanometer sized CoOOH coatings, have a higher capacity available and good performance at elevated temperatures of >50 degrees C.
近年来，对纳米级材料的研究在基础和应用方面都引起了极大的关注。在这封信中，我们报道了CoOOH纳米棒的合成及其作为高温镍氢（Ni-MH）电池氢氧化镍涂层材料的潜在应用。分别通过透射电子显微镜、X射线衍射和扫描电子显微镜研究了CoOOH纳米棒和包覆氢氧化镍颗粒的形貌和结构。评估了圆柱形AA尺寸Ni-MH电池的电化学性能。我们的结果表明，正电极由这种纳米尺寸的CoOOH涂层组成的Ni-MH电池，在高于50摄氏度的高温下具有更高的可用容量和良好的性能。
