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    Hydrogen-absorbing alloy electrode
    1.
    发明授权
    Hydrogen-absorbing alloy electrode 失效
    吸氢合金电极

    公开(公告)号：US5441826A

    公开(公告)日：1995-08-15

    申请号：US189172

    申请日：1994-01-31

    申请人： Hiroshi Watanabe ,  Akio Furukawa ,  Shin Fujitani ,  Ikuo Yonezu ,  Takahiro Isono

    发明人： Hiroshi Watanabe ,  Akio Furukawa ,  Shin Fujitani ,  Ikuo Yonezu ,  Takahiro Isono

    IPC分类号： H01M4/38 ,  H01M4/02

    CPC分类号： H01M4/383 ,  Y10S420/90

    摘要： Three types of novel hydrogen-absorbing alloy electrodes A, B and C usable for metal hydride secondary batteries are provided. All three types are represented by the general formula AB.sub.x wherein A represents Ti or elements that principally comprise Ti and generate heat upon absorption of hydrogen, B represents Mo and Ni or elements that principally comprise Mo and Ni and absorb heat upon absorption of hydrogen and 0.5.ltoreq.X.ltoreq.2, and are readily producible and difficult to undergo cycle deterioration and need only short activation treatment time. (A) uses a hydrogen-absorbing alloy obtained by quenching and solidifying an alloy melt under an atmosphere of a reducing gas containing hydrogen at a cooling rate of at least 1.times.10.sup.3 .degree. C./sec and having on the surface thereof a hydride layer; (B) uses a hydrogen-absorbing alloy having a composite phase structure comprising a main phase and a subphase, the average areal ratio of said subphase to said main phase in any cross-section of said alloy being 5 to 20%; and (C) uses a hydrogen-absorbing alloy having a composite structure comprising a main phase and subphase, said main phase comprising crystallites having a major axis length (a) of 0.8 to 6 .mu.m and a ratio of the major axis length (a) to minor axis ratio (b), a/b, of not more than 3.

    摘要翻译： 提供了可用于金属氢化物二次电池的三种新型吸氢合金电极A，B和C。 所有三种类型由通式ABx表示，其中A表示Ti或主要包含Ti并且在吸收氢时产生热量的元素，B表示Mo和Ni或主要包含Mo和Ni的元素，并且吸收氢和0.5时吸收热量

    Hydrogen-absorbing alloy electrode and method for evaluating hydrogen-absorbing alloys for electrode
    2.
    发明授权
    Hydrogen-absorbing alloy electrode and method for evaluating hydrogen-absorbing alloys for electrode 失效
    吸氢合金电极及评估电极用吸氢合金的方法

    公开(公告)号：US5688341A

    公开(公告)日：1997-11-18

    申请号：US676574

    申请日：1996-07-01

    申请人： Takahiro Isono ,  Hiroshi Watanabe ,  Shin Fujitani ,  Hiroshi Nakamura ,  Yumiko Nakamura ,  Ikuo Yonezu

    发明人： Takahiro Isono ,  Hiroshi Watanabe ,  Shin Fujitani ,  Hiroshi Nakamura ,  Yumiko Nakamura ,  Ikuo Yonezu

    IPC分类号： C01B3/00 ,  H01M4/38 ,  C21D11/00 ,  C21D1/54

    CPC分类号： C01B3/0031 ,  C01B3/0057 ,  C01B3/0068 ,  H01M4/383 ,  Y02E60/327

    摘要： A hydrogen-absorbing alloy electrode utilizes as an electrode material a hydrogen-absorbing alloy having selectively oriented crystals, which is expressed in terms of a specific maximum value obtained from analysis of powder X-ray diffractometry. This electrode, in which the hydrogen-absorbing alloy used is hardly pulverized upon repeated charge-discharge cycles and oxidation thereof is suppressed, gives metal hydride alkaline secondary batteries having excellent cycle characteristics. A method for evaluating hydogen-absorbing alloys for electrode comprises, utilizing the fact that there exists a clear relationship between specific parameters obtained by analyzing data based on the hydrogen-absorbing alloy to be evaluated and the characteristics of the electrode obtained therefrom, preparing and using analytical curves with the specific parameters. This method can evaluate rapidly and precisely various characteristics of hydrogen-absorbing alloys for electrode, without actually fabricating test cells therefrom.

    摘要翻译： 吸氢合金电极利用具有选择性取向晶体的吸氢合金作为电极材料，其以从粉末X射线衍射分析获得的特定最大值表示。 在反复充放电循环中使用的吸氢合金几乎不被粉碎的电极及其氧化被抑制，得到具有优异的循环特性的金属氢化物碱性二次电池。 用于评价电极用吸氢合金的方法包括利用通过基于待评价的吸氢合金分析数据获得的具体参数与由其获得的电极的特性之间存在明确的关系，准备和使用 具有特定参数的分析曲线。 该方法可以快速准确地评估用于电极的吸氢合金的各种特性，而不实际制造测试电池。

    Hydrogen absorbing alloy
    4.
    发明授权
    Hydrogen absorbing alloy 失效
    吸氢合金

    公开(公告)号：US5304345A

    公开(公告)日：1994-04-19

    申请号：US963030

    申请日：1992-10-19

    申请人： Shin Fujitani ,  Ikuo Yonezu ,  Koichi Nishimura ,  Toshihiko Saito ,  Akio Furukawa

    发明人： Shin Fujitani ,  Ikuo Yonezu ,  Koichi Nishimura ,  Toshihiko Saito ,  Akio Furukawa

    IPC分类号： C22C19/00 ,  C22C19/03 ,  H01M4/38

    CPC分类号： H01M4/383 ,  Y10S420/90

    摘要： A hydrogen absorbing alloy having a crystal structure of CaCu.sub.5 -type hexagonal system and represented by the general formula Re.sub.1-x Y.sub.x (Ni.sub.5-y G.sub.y).sub.z wherein Re is one of La, Ce, Nd, Pr, misch metal and lanthanum-rich misch metal, Y is yttrium, Ni is nickel, and G is an element capable of forming an intermetallic compound or complete solid solution in corporation with Ni or a mixture of such elements, and x, y and z are in the ranges of 0

    摘要翻译： 具有CaCu5型六方晶系的晶体结构并由通式Re 1-x Y x（Ni 5-y Ge y）z表示的吸氢合金，其中Re为La，Ce，Nd，Pr，混合稀土金属和富镧稀混合金属之一 ，Y是钇，Ni是镍，G是能够与Ni或这些元素的混合物一起形成金属间化合物或完全固溶体的元素，x，y和z在0

    Fuel cell system
    5.
    发明授权
    Fuel cell system 失效
    燃料电池系统

    公开(公告)号：US5229222A

    公开(公告)日：1993-07-20

    申请号：US790474

    申请日：1991-11-12

    申请人： Masaru Tsutsumi ,  Nobuyoshi Nishizawa ,  Tsukasa Itoh ,  Takaaki Matsubayashi ,  Takahiro Yonesaki ,  Koichi Satoh ,  Akio Furukawa ,  Ikuo Yonezu ,  Shin Fujitani ,  Kenji Nasako ,  Toshihiko Saito

    发明人： Masaru Tsutsumi ,  Nobuyoshi Nishizawa ,  Tsukasa Itoh ,  Takaaki Matsubayashi ,  Takahiro Yonesaki ,  Koichi Satoh ,  Akio Furukawa ,  Ikuo Yonezu ,  Shin Fujitani ,  Kenji Nasako ,  Toshihiko Saito

    IPC分类号： H01M8/04 ,  H01M8/06

    CPC分类号： H01M8/065 ,  H01M8/04089

    摘要： A fuel cell system for directly converting chemical energy of a fuel into electric energy electrochemically. A fuel cell has a cathode and an anode. A main hydrogen absorbing alloy supplies a hydrogen gas to the anode of the fuel cell during steady-state operation of the system. An auxiliary hydrogen absorbing alloy originally having a higher hydrogen gas absorbing/desorbing equilibrium pressure than the main hydrogen absorbing alloy at an equal temperature supplies a hydrogen gas to the anode until the equilibrium pressure of the main hydrogen absorbing alloy, which is supplied an exhaust gas from the fuel cell is equal to a hydrogen gas absorbing/desorbing equilibrium pressure of the auxiliary hydrogen absorbing alloy, the auxiliary hydrogen absorbing alloy receiving the hydrogen gas from the main hydrogen absorbing alloy during steady-state operation.

    摘要翻译： 燃料电池系统，用于将燃料中的化学能直接转化成电能的电能。 燃料电池具有阴极和阳极。 主要的储氢合金在系统的稳态运行期间向燃料电池的阳极供应氢气。 原始具有比主吸氢合金高的氢气吸收/解吸平衡压力的辅助吸氢合金在等温下将氢气供给到阳极，直到提供废气的主吸氢合金的平衡压力 燃料电池等于辅助吸氢合金的氢气吸收/解吸平衡压力，辅助吸氢合金在稳态运行期间从主吸氢合金接收氢气。

    Method of discriminating equilibrium characteristics of hydrogen absorbing alloys
    6.
    发明授权
    Method of discriminating equilibrium characteristics of hydrogen absorbing alloys 失效
    鉴别吸氢合金的平衡特性的方法

    公开(公告)号：US5517425A

    公开(公告)日：1996-05-14

    申请号：US305802

    申请日：1994-09-13

    申请人： Shin Fujitani ,  Akio Furukawa ,  Ikuo Yonezu ,  Toshihiko Saito

    发明人： Shin Fujitani ,  Akio Furukawa ,  Ikuo Yonezu ,  Toshihiko Saito

    IPC分类号： G01N7/16 ,  G01N33/20 ,  G01N7/00 ,  G06F19/00

    CPC分类号： G01N7/16 ,  G01N33/20

    摘要： The plateau region of P-C-T isotherm of a hydrogen absorbing alloy between the .alpha. phase region and .beta. phase region thereof is expressed by a normal cumulative distribution function wherein hydrogen content X is taken as frequency and the logarithm of equilibrium hydrogen pressure as a random variable. Parameters such as standard deviation .sigma. of the function are determined by numerical analysis based on measured data as to the equilibrium hydrogen pressure and hydrogen content of the plateau region of the alloy to be evaluated. Whether the equilibrium characteristics of the alloy are acceptable is determined using the parameters as evaluation criteria.

    摘要翻译： 在α相区域和β相区域之间的吸氢合金的P-C-T等温线的平稳区域由通常的累积分布函数表示，其中氢含量X作为频率，平衡氢压力的对数作为随机变量。 通过基于待评价合金的平台氢平衡压力和氢含量的测量数据的数值分析来确定功能的标准偏差σ等参数。 使用参数作为评价标准来确定合金的平衡特性是否可接受。