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    Hydrogen storage alloys having a high porosity surface layer
    5.
    发明授权
    Hydrogen storage alloys having a high porosity surface layer 有权
    具有高孔隙率表面层的储氢合金

    公开(公告)号：US06830725B2

    公开(公告)日：2004-12-14

    申请号：US10405008

    申请日：2003-04-01

    申请人： Michael A. Fetcenko ,  Stanford R. Ovshinsky ,  Kwo Young ,  Benjamin Reichman ,  Taihei Ouchi ,  John Koch ,  William Mays

    发明人： Michael A. Fetcenko ,  Stanford R. Ovshinsky ,  Kwo Young ,  Benjamin Reichman ,  Taihei Ouchi ,  John Koch ,  William Mays

    IPC分类号： C22C3000

    CPC分类号： H01M4/383 ,  H01M10/345 ,  Y02E60/324 ,  Y10S420/90

    摘要： Electrochemical and thermal hydrogen storage alloy compositions that provide superior performance, including an electrochemical hydrogen storage alloy that provides superior low temperature discharge characteristics. The alloy compositions include microstructures in the interface region that are highly porous and that include catalytic metallic particles. The microstructures include a large volume fraction of voids having spherical or channel-like shapes and are sufficiently open structurally to facilitate greater mobility of reactive species within the microstructure and in the vicinity of catalytic metallic particles. Greater accessibility to reactive sites accordingly results. The greater mobility of reactive species and/or the greater density of catalytic particles lead to faster kinetics and improved performance (e.g. higher power), especially at low operating temperatures. The microstructures may be formed through inclusion of a microstructure tuning element in the alloy composition, through control of processing conditions and/or through inclusion of etching steps in the post-formation processing of hydrogen storage alloys.

    摘要翻译： 提供优异性能的电化学和热储氢合金组合物，包括提供优异的低温放电特性的电化学储氢合金。 合金组合物包括界面区域中的高度多孔的微结构，并且包括催化金属颗粒。 微结构包括具有球形或通道状形状的大体积分数的空隙，并且在结构上足够开放以促进反应性物质在微结构内和催化金属颗粒附近的更大迁移率。 因此可以更好地获得反应性网站。 活性物质的较大迁移率和/或更大密度的催化剂颗粒导致更快的动力学和改进的性能（例如更高的功率），特别是在低的操作温度下。 可以通过在合金组合物中包含微结构调谐元件，通过控制加工条件和/或通过在储氢合金的后形成处理中包括蚀刻步骤来形成微观结构。