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    • 21. 发明申请
    • MIXED METAL OXIDE AND SODIUM SECONDARY BATTERY
    • 混合金属氧化物和钠二次电池
    • US20100323232A1
    • 2010-12-23
    • US12865976
    • 2009-02-03
    • Satoru KuzeMasami MakideraTaketsugu Yamamoto
    • Satoru KuzeMasami MakideraTaketsugu Yamamoto
    • H01M2/14H01M4/40H01M4/505H01M4/485H01M10/054
    • H01M4/525H01M2/1653H01M2/1686H01M4/505H01M10/054H01M10/54Y02W30/84
    • The present invention provides a sodium secondary battery capable of reducing the amount of lithium used, and ensuring a larger discharge capacity maintenance rate when having repeated a charge and discharge, as compared with conventional techniques; and a mixed metal oxide usable as the positive electrode active material therefor. A mixed metal oxide of the present invention comprises Na and M1 wherein M1 represents three or more elements selected from the group consisting of Mn, Fe, Co and Ni with an Na:M1 molar ratio being a:1 wherein a is a value falling within the range of more than 0.5 and less than 1. Also, a mixed metal oxide of the present invention is represented by the following formula (1): NaaM1O2  (1) wherein M1 and a each have the same meaning as above.The positive electrode active material for secondary batteries of the present invention comprises the mixed metal oxide above.
    • 本发明提供一种能够减少所使用的锂的量的钠二次电池,并且与现有的技术相比,能够在重复进行充放电时确保更大的放电容量维持率。 和可用作其的正极活性物质的混合金属氧化物。 本发明的混合金属氧化物包含Na和M1,其中M1表示选自Mn,Fe,Co和Ni中的三种或更多种元素,Na:M1摩尔比为a:1,其中a为落入 范围大于0.5且小于1.此外,本发明的混合金属氧化物由下式(1)表示:NaaM1O2(1)其中M1和a各自具有与上述相同的含义。 本发明的二次电池用正极活性物质包含上述复合金属氧化物。