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    • 5. 发明授权
    • Non-aqueous electrolyte and lithium secondary battery
    • 非水电解质和锂二次电池
    • US5795677A
    • 1998-08-18
    • US685666
    • 1996-07-24
    • Taketsugu YamamotoHitoshi Miura
    • Taketsugu YamamotoHitoshi Miura
    • H01M6/16H01M10/0569H01M6/14
    • H01M6/164H01M10/0569H01M2300/0034
    • The present invention provides a non-aqueous electrolyte that includes a non-aqueous solvent and a lithium salt. The non-aqueous electrolyte contains a halogen-substituted ether compound represented by the general formula (I): R.sub.1 --O--R.sub.2 (I) wherein R.sub.1 is an alkyl or halogen-substituted alkyl group having 2 or less carbon atoms and R.sub.2 is a halogen-substituted alkyl group having 2 to 10 carbon atoms. Additionally, the non-aqueous electrolyte contains at least one compound that is capable of dissolving the lithium salt in an amount of not less than 0.5 mol/liter. When this compound is added to the halogen-substituted ether compound, a mixed solvent is formed that is used as the non-aqueous solvent. The present invention also provides a lithium secondary battery that comprises a cathode that can be doped/undoped with lithium ions, an anode of a lithium metal or alloy or an anode that can be doped/undoped with lithium ions, and the non-aqueous electrolyte described above. A lithium secondary battery that uses the non-aqueous electrolyte of the present invention is superior in cycle life, in repeating charging/discharging and low-temperature capacity, is particularly superior in high-rate capacity, and causes little deterioration of high-rate capacity due to cycles.
    • 本发明提供一种包含非水溶剂和锂盐的非水电解质。 非水电解质含有由通式(I)表示的卤素取代的醚化合物:R1-O-R2(I)其中R1是具有2个或更少碳原子的烷基或卤素取代的烷基,R2是 具有2〜10个碳原子的卤素取代的烷基。 此外,非水电解质含有至少一种能够以0.5摩尔/升的量溶解锂盐的化合物。 当将该化合物加入到卤素取代的醚化合物中时,形成用作非水溶剂的混合溶剂。 本发明还提供一种锂二次电池,其包括可以掺杂/未掺杂锂离子的阴极,锂金属或合金的阳极或可以掺杂/未掺杂锂离子的阳极,并且非水电解质 如上所述。 使用本发明的非水电解质的锂二次电池的循环寿命优异,重复充放电和低温容量优异,高容量特性优异,高容量容量几乎不劣化 由于循环。
    • 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。