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    Positive electrode active material for nonaqueous secondary cells and a process for producing said active material
    1.
    发明授权
    Positive electrode active material for nonaqueous secondary cells and a process for producing said active material 失效
    非水系二次电池用正极活性物质及其制造方法

    公开(公告)号：US6077496A

    公开(公告)日：2000-06-20

    申请号：US925028

    申请日：1997-09-08

    申请人： Yuichi Ito ,  Yukio Hiraoka ,  Akinobu Iikawa ,  Masaru Nishisako ,  Choju Nagata ,  Kenichi Harigae

    发明人： Yuichi Ito ,  Yukio Hiraoka ,  Akinobu Iikawa ,  Masaru Nishisako ,  Choju Nagata ,  Kenichi Harigae

    IPC分类号： C01G53/00 ,  H01M4/48 ,  H01M4/485 ,  H01M4/50 ,  H01M4/505 ,  H01M4/52 ,  H01M4/525 ,  C01G49/00

    CPC分类号： C01G53/50 ,  C01G53/42 ,  H01M4/525 ,  C01P2002/54 ,  C01P2004/32 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  C01P2006/80 ,  H01M4/485 ,  H01M4/505 ,  Y02P70/54

    摘要： The mixed powders of a lithium compound and a transition metal based compound are formed into shaped parts, which are packed to form a bed 6 on a porous plate 5 in the bottom of a reaction vessel 7 placed on a support 10 in a firing furnace 8 equipped with an electric heater; the packed parts are fired with an oxidizing gas such as air being forced through the bed 6 at a superficial velocity higher than a specified value via a gas feed pipe 3 connecting an air pump 1, a flow regulator 2 and a preheater 4 and the gas emerging from the bed 6 is discharged into the air atmosphere through a ventilation port 9. Even if increased amounts of the mixed powders have to be fired, the invention process enables the production of a lithium complex oxide as an active material that is homogeneous and which features excellent cell characteristics. If the manufacturing conditions are controlled such that the media diameter as a powder characteristic of the lithium complex oxide is within an appropriate range while, at the same time, the ratio of the median diameter to the specific surface area diameter is adjusted to lie within an appropriate range, one can produce an active material that has not only high initial capacity but also improved cycle characteristics.

    摘要翻译： 将锂化合物和过渡金属类化合物的混合粉末形成为成形部件，其被填充以在放置在燃烧炉8中的支撑体10上的反应容器7的底部的多孔板5上形成床6 配有电加热器; 填充部件通过连接空气泵1，流量调节器2和预热器4的气体供给管3以及气体的气体，以等于特定值的表观速度被强制通过床6的氧化气体燃烧 从床6出来的排出物通过通气口9被排放到空气气氛中。即使必须烧制混合粉末的量增加，本发明方法能够制备作为均匀的活性物质的锂复合氧化物， 具有优异的电池特性。 如果控制制造条件使得作为锂复合氧化物的粉末特性的介质直径在适当的范围内，同时将中值直径与比表面积直径的比率调整为在 适当的范围，可以产生不仅具有高初始容量但也改善循环特性的活性材料。

    Strontium nitrate and method for manufacturing same
    4.
    发明授权
    Strontium nitrate and method for manufacturing same 失效
    硝酸锶及其制造方法

    公开(公告)号：US06221322B1

    公开(公告)日：2001-04-24

    申请号：US09196158

    申请日：1998-11-20

    申请人： Tatsumi Inamura ,  Atsushi Tsukada ,  Kazunari Suzuki ,  Choju Nagata

    发明人： Tatsumi Inamura ,  Atsushi Tsukada ,  Kazunari Suzuki ,  Choju Nagata

    IPC分类号： C01B2148

    CPC分类号： C01F11/462 ,  C01F11/36 ,  C01P2004/61 ,  C01P2006/80

    摘要： Low-cost, high-purity strontium nitrate that is low in Ba, Na, Ca, Cr, and other impurities and that is suitable for use in airbags or the like is provided. High-purity strontium nitrate having a Ba content of 0.01 wt % or lower, an Na content of 0.005 wt % or lower, a Ca content of 0.01 wt % or lower, a Cr content of less than 0.001 wt %, and a purity of 99.5 wt % or higher is produced by a manufacturing method comprising a first step for performing crystallization by adding nitric acid to an aqueous solution obtained by dissolving a strontium compound as a starting material, a second step for separating the resulting crystals, a third step for crystallizing the resulting separated solution, and a fourth step for separating the resulting crystals.

    摘要翻译： 提供低成本，高纯度的Ba，Na，Ca，Cr等杂质的硝酸锶，适用于安全气囊等。 Ba含量为0.01重量％以下，Na含量为0.005重量％以下，Ca含量为0.01重量％以下，Cr含量小于0.001重量％的高纯度硝酸锶，纯度为 通过包括通过将硝酸添加到通过溶解锶化合物作为起始原料获得的水溶液中进行结晶的第一步骤的制造方法制备99.5重量％以上，第二步，用于分离所得晶体，第三步骤 使所得分离的溶液结晶，以及分离所得晶体的第四步骤。