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    • 3. 发明专利
    • 二次電池および負極活物質
    • 二次电池和负极电极活性材料
    • JP2014199753A
    • 2014-10-23
    • JP2013074625
    • 2013-03-29
    • 日本電気株式会社Nec Corp
    • SERIZAWA SHINKAJITA TETSUYANOGUCHI TAKEHIROSASAKI HIDEAKITAKAHASHI MAKIKO
    • H01M4/38H01M4/36H01M10/052H01M10/0566
    • Y02E60/122Y02P70/54Y02T10/7011
    • 【課題】高い電流値でも高容量でサイクル低下がなく、しかも初回充放電時における不可逆容量の少ない二次電池および負極活物質を提供する。【解決手段】リチウム原料とシリコン酸化物原料とを含む原料を、スピノーダル分相を形成するリチウムとシリコンの酸化物の組成比において混合する工程と、前記組成比における混和温度以上に加熱する工程と、前記組成比においてスピノーダル分解を発生する温度より低い温度まで急冷する工程と、前記組成比においてスピノーダル分相を形成する温度領域で加熱処理をする工程により製造された、シリコン酸化物中に連続相のリチウムシリケート相を有する負極活物質【選択図】図1
    • 要解决的问题:提供即使具有高电流值也具有高容量和较少循环降低的二次电池,并且在初始充放电期间具有小的不可逆容量,并提供负极活性物质。解决方案:A 在氧化硅中具有连续相的硅酸锂相的负极活性物质是通过将含有锂材料的原料与氧化硅材料的锂与形成旋极相分离的锂以与氧化硅的氧化物的组成比 硅,以组成比以上的混合温度下加热的工序,淬火至低于组成比下产生旋节分解温度的温度的步骤,以及在形成旋节状的温度范围内进行热处理的工序 相分离成分比。
    • 4. 发明专利
    • Lithium secondary battery and manufacturing method thereof
    • 锂二次电池及其制造方法
    • JP2012221681A
    • 2012-11-12
    • JP2011085362
    • 2011-04-07
    • Nec Corp日本電気株式会社
    • KAJITA TETSUYAIRIYAMA JIRONUMATA TATSUJI
    • H01M4/136H01M4/36H01M4/38H01M4/48H01M4/52H01M4/58H01M10/052
    • Y02P70/54
    • PROBLEM TO BE SOLVED: To provide a lithium secondary battery which, even when an olivine compound having large specific gravity but excelling in stability at charge/discharge time is used for a cathode active material and a material having large lithium ion irreversible capacity at initial charge/discharge time is used for an anode active material, can restrict reduction in energy density per unit cubic volume of the cathode active material at subsequent charges/discharges, has high capacity, and can restrict reduction in manufacturing efficiency due to a difference in cathode and anode layer thickness, and which is high in safety and good in charge/discharge efficiency and has long life, and a manufacturing method thereof.SOLUTION: A cathode 6 prior to an initial charge includes a cathode active material which contains a specific olivine compound and a specific lithium transition metal oxide. The cathode active material after the initial charge contains a lithium irreversible transition metal oxide which is formed from the lithium transition metal oxide as it emits all of the lithium which can be emitted.
    • 解决的问题:提供一种锂二次电池,其即使当具有比重大但在充电/放电时间稳定性优异的橄榄石化合物用于阴极活性材料和具有大锂离子不可逆容量的材料时也是如此 在初始充放电时间用于阳极活性物质时,可以限制随后的充放电时阴极活性物质的单位立方体积的能量密度的降低,具有高容量,并且可以限制由于差异导致的制造效率的降低 阴极和阳极层的厚度及其制造方法,其安全性高,充放电效率好,寿命长。 解决方案:初始电荷之前的阴极6包括含有特定橄榄石化合物和特定锂过渡金属氧化物的正极活性材料。 初始充电后的正极活性物质含有由锂过渡金属氧化物形成的锂不可逆过渡金属氧化物,因为锂离子过渡金属氧化物会释放出所有能发出的锂。 版权所有(C)2013,JPO&INPIT
    • 8. 发明专利
    • Lithium secondary battery, control system thereof, and state detection method of lithium secondary battery
    • 锂二次电池,其控制系统和锂二次电池的状态检测方法
    • JP2012054220A
    • 2012-03-15
    • JP2010287956
    • 2010-12-24
    • Nec CorpNec Energy Devices LtdNecエナジーデバイス株式会社日本電気株式会社
    • IRIYAMA JIROKAJITA TETSUYAKAWASAKI DAISUKEKASAHARA RYUICHINUMATA TATSUJI
    • H01M10/48H01M4/48H01M10/44
    • H01M10/48G01R31/362G01R31/3648G06F17/15H01M4/485H01M10/44H02J7/00H02J7/007Y02E60/122Y02P70/54
    • PROBLEM TO BE SOLVED: To provide a lithium secondary battery control system capable of quantitatively detecting a deterioration state specific to a lithium secondary battery that uses a silicon oxide as a negative electrode active material, that is, a non-uniform reaction state of the negative electrode.SOLUTION: A lithium secondary battery control system provided with a positive electrode, a negative electrode that uses the silicon oxide as the negative electrode active material, and a lithium reference electrode having a reference potential for the negative electrode comprises: measuring means for measuring a voltage V of the negative electrode for the lithium reference electrode and a discharge capacity Q of the lithium secondary battery when the lithium secondary battery is discharged; generation means for generating a V-dQ/dV curve representing the relationship between dQ/dV which is the ratio of a variation dQ of a discharge capacity Q to a variation dV of the voltage V and the voltage V; calculation means for calculating an intensity ratio of two peaks that appear on the V-dQ/dV curve for two voltage values in the voltage V; and detecting means for detecting the negative electrode state using the intensity ratio.
    • 解决的问题:提供一种能够定量检测使用氧化硅作为负极活性物质的锂二次电池特有的劣化状态的锂二次电池控制系统,即不均匀的反应状态 的负极。 解决方案:设置有正极的锂二次电池控制系统,使用氧化硅作为负极活性物质的负极和具有用于负极的基准电位的锂参考电极包括:测量装置,用于 当锂二次电池放电时,测量锂参考电极用负极的电压V和锂二次电池的放电容量Q; 用于产生表示作为放电容量Q的变化dQ与电压V的变化dV与电压V之比的dQ / dV之间的关系的V-dQ / dV曲线的产生装置; 用于计算在V-dQ / dV曲线上出现的电压V中的两个电压值的两个峰值的强度比的计算装置; 以及检测装置,用于使用强度比检测负极状态。 版权所有(C)2012,JPO&INPIT