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    • 8. 发明申请
    • Stoichiometric Lithium Cobalt Oxide and Method for Preparation of the Same
    • 化学计量氧化钴钴及其制备方法
    • US20070218363A1
    • 2007-09-20
    • US11688636
    • 2007-03-20
    • Jens M. PaulsenSun Sik ShinHong-Kyu Park
    • Jens M. PaulsenSun Sik ShinHong-Kyu Park
    • H01M4/52C01G51/04
    • H01M4/525C01G51/42C01G51/50C01G53/50C01P2002/77C01P2004/03C01P2006/40H01M4/04H01M4/131H01M4/366H01M4/483H01M4/505H01M4/523H01M10/0525Y02E60/122Y02P70/54
    • The present invention provides a LiCoO2-containing powder comprising LiCoO2 having a stoichiometric composition via heat treatment of a lithium cobalt oxide and a lithium buffer material to make equilibrium of a lithium chemical potential therebetween: a lithium buffer material which acts as a Li acceptor or a Li donor to remove or supplement Li-excess or Li-deficiency, coexisting with a stoichiometric lithium metal oxide; and a method for preparing a LiCoO2-containing powder. Further, provided is an electrode comprising the above-mentioned LiCoO2-containing powder as an active material, and a rechargeable battery comprising the same electrode.The present invention enables production of a LiCoO2 electrode active material which has improved high-temperature storage properties and high-voltage cycling properties, and is robust in composition fluctuation in the production process. Therefore, the present invention provides advantages such as reduction of time and labor required for quality control and process management in the mass-production of the electrode active material, and decreased production costs of LiCoO2.
    • 本发明通过热处理锂钴氧化物和锂缓冲材料提供包含具有化学计量组成的LiCoO 2 N 2的含LiCoO 2 N的粉末,以使锂的平衡 它们之间的化学势:用作Li受体或Li给体以除去或补充Li-过量或Li-缺乏的锂缓冲材料,与化学计量的锂金属氧化物共存; 以及制备含有LiCoO 2 N的粉末的方法。 此外,提供了包含上述含有LiCoO 2 N 2的粉末作为活性材料的电极和包含相同电极的可再充电电池。 本发明能够生产具有改进的高温储存性能和高电压循环性能的LiCoO 2 N 2电极活性材料,并且在生产过程中的组成波动中是稳定的。 因此,本发明提供了在电极活性物质的批量生产中减少质量控制和工艺管理所需的时间和劳动以及降低LiCoO 2 2的生产成本的优点。
    • 9. 发明授权
    • Additives for non-aqueous electrolyte and lithium secondary battery using the same
    • 非水电解质和锂二次电池用添加剂
    • US07927747B2
    • 2011-04-19
    • US11623845
    • 2007-01-17
    • Ho Chun LeeSun Sik ShinHong Kyu ParkJoo Mi JeonJeong Ju Cho
    • Ho Chun LeeSun Sik ShinHong Kyu ParkJoo Mi JeonJeong Ju Cho
    • H01M6/16H01M6/04
    • H01M10/0525H01M10/0567H01M10/4235H01M2300/0025
    • Disclosed is an electrolyte for batteries, comprising: (a) an electrolyte salt; (b) an organic solvent; (c) a first compound having an oxidation initiation voltage (vs. Li/Li+) higher than the operating voltage of a cathode; and (d) a second reversible compound having an oxidation initiation voltage higher than the operating voltage of the cathode, but lower than the oxidation initiation voltage of the first compound. Also disclosed is a lithium secondary battery comprising said electrolyte. In the lithium secondary battery, two compounds having different safety improvement actions at a voltage higher than the operating voltage of the cathode are used in combination as electrolyte components. Thus, the safety of the secondary battery in an overcharged state can be ensured, and at the same time, the deterioration of the battery can be prevented from occurring when it is repeatedly cycled, continuously charged and stored at high temperature for a long time.
    • 公开了一种用于电池的电解质,其包括:(a)电解质盐; (b)有机溶剂; (c)具有高于阴极的工作电压的氧化起始电压(相对于Li / Li +)的第一化合物; 和(d)具有高于阴极的工作电压但低于第一化合物的氧化起始电压的氧化起始电压的第二可逆化合物。 还公开了包含所述电解质的锂二次电池。 在锂二次电池中,作为电解质成分组合使用具有比阴极的工作电压高的电压具有不同安全性改善作用的两种化合物。 因此,可以确保二次电池处于过充电状态的安全性,并且同时可以防止在重复循环,连续充电并长时间在高温下储存时发生电池的劣化。