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    Electrolytic manganese dioxide and method of manufacturing the same
    7.
    发明授权
    Electrolytic manganese dioxide and method of manufacturing the same 失效
    电解二氧化锰及其制造方法

    公开(公告)号：US5746902A

    公开(公告)日：1998-05-05

    申请号：US574927

    申请日：1995-12-19

    申请人： Hisao Takehara ,  Yoshihiro Nakayama ,  Ryoichi Shimizugawa ,  Tsutomu Kishikawa ,  Takumi Murai ,  Fumiya Takahashi ,  Koh Takahashi

    发明人： Hisao Takehara ,  Yoshihiro Nakayama ,  Ryoichi Shimizugawa ,  Tsutomu Kishikawa ,  Takumi Murai ,  Fumiya Takahashi ,  Koh Takahashi

    IPC分类号： C01G45/02 ,  C25B1/21 ,  H01M4/50 ,  C25B1/00

    CPC分类号： C25B1/21 ,  C01G45/02 ,  H01M4/50 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/40

    摘要： There is provided manganese dioxide to be suitably used for alkaline manganese batteries and manganese batteries to make them excellent both in the initial performance and the storability. There is also provided a method of manufacturing such manganese dioxide. The electrolytic manganese dioxide has a BET specific surface area of less than 30 m.sup.2 /g (preferably less than 27 m.sup.2 /g) and a suspensiveness of less than 50 mg/liter. A method of manufacturing electrolytic manganese dioxide may be a suspension method, wherein manganese oxide is suspended at a rate of 0.01 to 0.2 g/liter in an electrolytic bath containing sulfuric acid at a concentration of 0.4 to 0.55 mol/liter and electrolyzed to produce electrolytic manganese dioxide with an anodic current density of 0.4 to 3.0 A/dm.sup.2 and an electrolytic temperature of 93.degree. to 103.degree. C., the relationship between the anodic current density and the electrolytic temperature being expressed by 103.gtoreq.y.gtoreq.1.67x+92.33 (where x represents the anodic current density and y represents the electrolytic temperature). Alternatively, a method of manufacturing electrolytic manganese dioxide may be a clarification method, wherein manganese dioxide is electrolyzed in an electrolytic bath containing sulfuric acid at a concentration of 0.3 to 0.45 mol/liter without being suspended therein to produce electrolytic manganese dioxide with an anodic current density of 0.4 to 0.9 A/dm.sup.2 and an electrolytic temperature of 94.degree. to 103.degree. C., the relationship between the anodic current density and the electrolytic temperature being expressed by 103.gtoreq.y.gtoreq.10.00x+90.00. In either the suspension method or the clarification method, two or more than two values may be cyclically used for the anodic current density within the defined range. Still alternatively, the suspension method and the clarification method may be alternately used for electrolysis.

    摘要翻译： 提供适合用于碱性锰电池和锰电池的二氧化锰，使其在初始性能和存储性方面均优异。 还提供了制造这种二氧化锰的方法。 电解二氧化锰的BET比表面积小于30m 2 / g（优选小于27m 2 / g），悬浮性小于50mg / l。 制备电解二氧化锰的方法可以是一种悬浮法，其中在含有浓度为0.4至0.55摩尔/升的硫酸的电解浴中以0.01至0.2克/升的速率将氧化锰悬浮并电解以产生电解 阳极电流密度为0.4〜3.0A / dm 2，电解温度为93〜103℃的二氧化锰，阳极电流密度与电解温度之间的关系由下式表示： x + 92.33（其中x表示阳极电流密度，y表示电解温度）。 或者，制造电解二氧化锰的方法可以是澄清方法，其中二氧化锰在含有浓度为0.3至0.45mol /升的硫酸的电解槽中电解而不悬浮在其中以产生具有阳极电流的电解二氧化锰 密度为0.4〜0.9A / dm 2，电解温度为94〜103℃，阳极电流密度与电解温度之间的关系由103> = = 10.00x + 90.00表示。 在悬浮法或澄清法中，两个或两个以上的值可循环使用在规定范围内的阳极电流密度。 或者，悬浮法和澄清方法可以交替地用于电解。