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    • 6. 发明申请
    • Lithium secondary battery
    • 锂二次电池
    • US20070202365A1
    • 2007-08-30
    • US11709252
    • 2007-02-22
    • Shouichirou SawaKazuyuki SatouAtsushi FukuiYasuyuki KusumotoMaruo Kamino
    • Shouichirou SawaKazuyuki SatouAtsushi FukuiYasuyuki KusumotoMaruo Kamino
    • H01M14/00H01M4/58H01M4/62
    • H01M4/134H01M4/622H01M4/661H01M2004/021H01M2010/4292
    • In a lithium secondary battery using negative electrode active material particles containing silicon, excellent charge-discharge characteristics are achieved and swelling of the negative electrode is minimized. A lithium secondary battery has a positive electrode containing a positive electrode active material, a negative electrode containing an active material layer and a current collector made of a conductive metal foil, and a non-aqueous electrolyte. The active material layer has a binder and active material particles containing silicon, and is formed by sintering the active material layer on a current collector surface in a non-oxidizing atmosphere. The active material particles have an average particle size of from 7.5-15 μm and a particle size distribution such that 60 volume % or more of the active material particles falls within the ±40% range of the average particle size, and the lithium secondary battery has a negative/positive electrode capacity ratio of 1.7 or greater.
    • 在使用含有硅的负极活性物质粒子的锂二次电池中,实现了优异的充放电特性,并使负极的膨胀最小化。 锂二次电池具有包含正极活性物质的正极,含有活性物质层的负极和由导电性金属箔构成的集电体和非水电解质。 活性物质层具有粘合剂和含有硅的活性物质颗粒,并且通过在非氧化性气氛中在集电体表面上烧结活性物质层而形成。 活性物质粒子的平均粒径为7.5〜15μm,粒径分布为60体积%以上的活性物质粒子落入平均粒径的±40%范围内,锂二次电池 负极/正极容量比为1.7以上。
    • 10. 发明申请
    • Lithium secondary battery
    • 锂二次电池
    • US20090087731A1
    • 2009-04-02
    • US12232917
    • 2008-09-25
    • Atsushi FukuiMaruo Kamino
    • Atsushi FukuiMaruo Kamino
    • H01M2/02
    • H01M10/0525H01M2/0217H01M4/131H01M4/134H01M4/624H01M10/0569H01M10/0587H01M2004/021
    • A lithium secondary battery includes: a positive electrode having a positive electrode active material layer disposed on a positive electrode current collector, the positive electrode active material layer containing a positive electrode binder and a positive electrode active material containing a layered lithium-transition metal composite oxide; a negative electrode having a negative electrode current collector and a negative electrode active material layer disposed on the negative electrode current collector, the negative electrode active material layer containing a negative electrode binder and a negative electrode active material containing particles of silicon and/or a silicon alloy; and a non-aqueous electrolyte. Al2O3 particles are firmly adhered to a surface of the lithium-transition metal composite oxide so that a BET specific surface area of the positive electrode active material after the adherence of the Al2O3 particles is from 1.5 times to 8 times greater than that before the adherence of the Al2O3 particles
    • 锂二次电池包括:具有设置在正极集电体上的正极活性物质层的正极,包含正极粘合剂的正极活性物质层和含有层状锂过渡金属复合氧化物的正极活性物质 ; 具有负极集电体和设置在负极集电体上的负极活性物质层的负极,含有负极活性物质的负极活性物质层和含有硅和/或硅的粒子的负极活性物质 合金; 和非水电解质。 Al 2 O 3颗粒牢固地粘附到锂 - 过渡金属复合氧化物的表面上,使得在Al 2 O 3颗粒粘附之后的正极活性材料的BET比表面积比粘附前的比例大1.5倍至8倍 Al2O3颗粒