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    • 4. 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。
    • 5. 发明授权
    • Powder for positive electrode active material, positive active electrode active material, and sodium secondary battery
    • 正极活性物质粉末,正极活性物质活性物质,钠二次电池
    • US08790831B2
    • 2014-07-29
    • US12866148
    • 2009-02-03
    • Masami MakideraTaketsugu Yamamoto
    • Masami MakideraTaketsugu Yamamoto
    • H01M4/50H01B1/02H01M4/52
    • H01M2/1653H01M4/505H01M4/525H01M10/056Y10T428/2982
    • The present invention provides a positive electrode active material that can suppress the necessity of performing sieving and is suitable for use in secondary batteries, particularly sodium secondary batteries. Also provided is a powder for a positive electrode active material as a raw material for the positive electrode active material. The powder for a positive electrode active material of the present invention comprises Mn-containing particles. In the cumulative particle size distribution on the volume basis of particles constituting the powder, D50, which is the particle diameter at a 50% cumulation measured from the smallest particle, is in the range of from 0.1 μm to 10 μm, and 90 vol % or more of the particles constituting the powder are in the range of from 0.3 times to 3 times D50. The powder for a positive electrode active material comprises Mn-containing particles, and 90 vol % or more of the particles constituting the powder are in the range of from 0.6 μm to 6 μm. The positive electrode active material is a powdery positive electrode active material obtained by calcining a mixture of the powder for positive electrode active material and a sodium compound. The positive electrode for sodium rechargeable batteries comprises the positive electrode active material.
    • 本发明提供能够抑制进行筛分的必要性的正极活性物质,适用于二次电池,特别是钠二次电池。 还提供了作为正极活性物质的原料的正极活性物质的粉末。 本发明的正极活性物质用粉末含有Mn粒子。 在构成粉末的粒子的体积基础上的累积粒度分布中,从最小粒子测定的50%累积时的粒径D50为0.1μm〜10μm,90体积% 或更多的构成粉末的颗粒在D50的0.3倍至3倍的范围内。 用于正极活性物质的粉末包含含Mn颗粒,并且构成粉末的颗粒的90体积%以上在0.6μm至6μm的范围内。 正极活性物质是通过煅烧正极活性物质粉末和钠化合物的混合物而获得的粉末状正极活性物质。 钠可充电电池用正极包含正极活性物质。
    • 6. 发明申请
    • MIXED METAL OXIDE AND SODIUM SECONDARY BATTERY
    • 混合金属氧化物和钠二次电池
    • US20110003192A1
    • 2011-01-06
    • US12865993
    • 2009-02-03
    • Satoru KuzeMasami MakideraTaketsugu Yamamoto
    • Satoru KuzeMasami MakideraTaketsugu Yamamoto
    • H01M2/16H01M4/88
    • H01M10/054C01G49/0072C01G53/50C01P2002/72H01M2/1653H01M2/1686H01M4/505H01M4/525H01M4/5825H01M10/4235Y02E60/122
    • The present invention provides a sodium secondary battery capable of reducing the amount used of a scarce metal element such as lithium and cobalt and moreover, ensuring a larger discharge capacity after repeating charge/discharge as compared with conventional techniques, and a mixed metal oxide usable as the positive electrode active material therefor. The mixed metal oxide of the present invention comprises Na, Mn and M1 wherein M1 is Fe or Ni, with a Na:Mn:M1 molar ratio being a:(1-b):b wherein a is a value falling within the range of more than 0.5 and less than 1, and b is a value falling within the range of from 0.001 to 0.5. Another mixed metal oxide of the present invention is a mixed metal oxide represented by the following formula (1): NaaMn1-bM1bO2 (1) wherein M1, a and b each have the same meaning as above. The positive electrode active material for sodium secondary batteries of the present invention comprises the mixed metal oxide above.
    • 本发明提供一种钠二次电池,其能够减少诸如锂和钴之类的稀有金属元素的使用量,此外,与常规技术相比,确保了重复充电/放电后的放电容量更大,并且可用作 正极活性物质。 本发明的混合金属氧化物包括Na,Mn和M1,其中M1是Fe或Ni,Na:Mn:M1的摩尔比为a:(1-b):b其中a是落在 大于0.5且小于1,b为0.001至0.5的范围内的值。 本发明的另一种混合金属氧化物是由下式(1)表示的混合金属氧化物:NaaMn1-bM1bO2(1)其中M1,a和b各自具有与上述相同的含义。 本发明的钠二次电池用正极活性物质包含上述混合金属氧化物。
    • 9. 发明申请
    • POWDER FOR POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ACTIVE ELECTRODE ACTIVE MATERIAL, AND SODIUM SECONDARY BATTERY
    • 活性电极活性材料,阳极活性电极活性材料和钠二次电池用粉末
    • US20110008668A1
    • 2011-01-13
    • US12866148
    • 2009-02-03
    • Masami MakideraTaketsugu Yamamoto
    • Masami MakideraTaketsugu Yamamoto
    • H01M4/50H01B1/02H01M4/52H01M2/14
    • H01M2/1653H01M4/505H01M4/525H01M10/056Y10T428/2982
    • The present invention provides a positive electrode active material that can suppress the necessity of performing sieving and is suitable for use in secondary batteries, particularly sodium secondary batteries. Also provided is a powder for a positive electrode active material as a raw material for the positive electrode active material. The powder for a positive electrode active material of the present invention comprises Mn-containing particles. In the cumulative particle size distribution on the volume basis of particles constituting the powder, D50, which is the particle diameter at a 50% cumulation measured from the smallest particle, is in the range of from 0.1 μm to 10 μm, and 90 vol % or more of the particles constituting the powder are in the range of from 0.3 times to 3 times D50. The powder for a positive electrode active material comprises Mn-containing particles, and 90 vol % or more of the particles constituting the powder are in the range of from 0.6 μm to 6 μm. The positive electrode active material is a powdery positive electrode active material obtained by calcining a mixture of the powder for positive electrode active material and a sodium compound. The positive electrode for sodium rechargeable batteries comprises the positive electrode active material.
    • 本发明提供能够抑制进行筛分的必要性的正极活性物质,适用于二次电池,特别是钠二次电池。 还提供了作为正极活性物质的原料的正极活性物质的粉末。 本发明的正极活性物质用粉末含有Mn粒子。 在构成粉末的粒子的体积基础上的累积粒度分布中,从最小粒子测定的50%累积时的粒径D50为0.1μm〜10μm,90体积% 或更多的构成粉末的颗粒在D50的0.3倍至3倍的范围内。 用于正极活性物质的粉末包含含Mn颗粒,并且构成粉末的颗粒的90体积%以上在0.6μm至6μm的范围内。 正极活性物质是通过煅烧正极活性物质粉末和钠化合物的混合物而获得的粉末状正极活性物质。 钠可充电电池用正极包含正极活性物质。