会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 2. 发明专利
    • Hydrogen storage alloy having high porosity surface layer
    • 具有高孔隙度表面层的氢储存合金
    • JP2007046161A
    • 2007-02-22
    • JP2006213523
    • 2006-08-04
    • Ovonic Battery Co Incオヴォニック バッテリー カンパニー インコーポレイテッド
    • FETCENKO MICHAEL AOVSHINSKY STANFORD RYOUNG KWOREICHMAN BENJAMINOUCHI TAIHEIKOCH JOHNMAYS WILLIAM
    • C22C19/00B01J23/755B01J23/86C01B3/00C22C1/00C22C1/02C22C1/05C22C19/03C22C30/00H01M4/38H01M8/04H01M10/34
    • H01M4/383H01M10/345Y02E60/324Y10S420/90
    • PROBLEM TO BE SOLVED: To provide hydrogen storage alloys as well as electrochemical cells, batteries and fuel cells using these alloys, more particularly, to provide hydrogen storage alloys having microstructures that are highly permeable and/or that include high concentrations of catalytically active metal or metal alloy particles. SOLUTION: 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. COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供使用这些合金的储氢合金以及电化学电池,电池和燃料电池,更具体地说,提供具有高度可渗透性和/或包含高浓度催化剂的微结构的储氢合金 活性金属或金属合金颗粒。 解决方案: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。 版权所有(C)2007,JPO&INPIT
    • 5. 发明专利
    • DE602004010083T2
    • 2008-08-28
    • DE602004010083
    • 2004-03-23
    • OVONIC BATTERY CO INC
    • FETCENKO MICHAEL AOVSHINSKY STANFORD RYOUNG KWOREICHMAN BENJAMINOUCHI TAIHEIKOCH JOHNMAYS WILLIAM
    • C22C30/00B01J23/755C22C1/05C22C19/03H01M4/38H01M10/34
    • Electrochemical and gas phase hydrogen storage alloy compositions that provide superior performance, especially at low temperature, and excellent cycle life characteristics. The alloys of this invention are AB 5 type alloys that include a cycle life enhancement element and a low Co concentration. The preferred cycle life enhancement elements include Zr and Si. The cycle life enhancement elements increase the cycle life of the instant alloys by reducing the pulverization of alloy particles upon repeated cycles of charging-discharging or hydriding-dehydriding. The alloys are characterized by low hysteresis on cycling, where hysteresis is measured in terms of mass concentration difference, a parameter related to the activation energy associated with the incorporation of hydrogen into the alloy. The instant alloys are designed to have a low activation energy for hydrogen incorporation and as a result, provide low hysteresis and a more uniform concentration of absorbed hydrogen within the material. As a result, differential lattice expansion effects associated with the absorption of hydrogen are minimized and the tendency for particle pulverization on cycling is minimized. Alloys having a low Co concentration and long cycle life are thus provided for.