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    • 10. 发明公开
    • NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, PREPARATION METHOD OF THE SAME, AND LITHIUM SECONDARY BATTERY CONTAINING THE SAME
    • 二次电池用负极活性材料的锂,工艺用于生产和锂二次电池
    • EP2282367A1
    • 2011-02-09
    • EP09738953.0
    • 2009-04-28
    • Ls Mtron Ltd.SHOWA DENKO K.K.
    • HAN, Jung-MinOH, Jeong-HunKIM, Jong-SungYOUM, ChulHAN, Kyung-HeeTAKEUCHI, MasatakaSUDOH, AkinoriSOTOWA, Chiaki
    • H01M4/58
    • H01M4/587H01M4/362H01M4/364H01M10/052
    • The present invention relates to a negative electrode active material for a lithium secondary battery, a preparation method thereof, and a lithium secondary battery containing the negative electrode active material. The negative electrode active material for the lithium secondary battery according to the present invention is formed by mixing: a carbon material coated with vapor growth carbon fiber (VGCF) and amorphous graphite; and one or more kinds of other carbon material selected from natural graphite, artificial graphite, amorphous-coated graphite, resin-coated graphite and amorphous carbon. According to the present invention, when the negative electrode active material is prepared, the carbon fiber is uniformly dispersed-throughout the carbon material, and the carbon material is coated with the amorphous graphite and then mixed with other carbon materials, and thus, a high electrode density can be achieved. Accordingly, even with high electrode density, the invention can provide the negative electrode active material with excellent electrochemical properties such as charge/discharge efficiency and cycle characteristics.
    • 本发明涉及一种负极活性物质的锂二次电池,其制备方法,以及含有该负极活性物质的锂二次电池。 用于锂二次电池gemäß到本发明的负极活性材料通过混合而形成:涂布有气相生长碳纤维(VGCF)和非晶质石墨的碳材料; 和其他的碳材料的一种或多种选自天然石墨,人造石墨,非晶质被覆石墨,树脂被覆石墨和无定形碳中选择。 。根据本发明,当制备负电极活性材料,碳纤维均匀地分散,在整个碳材料,并且该碳材料涂覆有非晶质石墨,然后与其他碳材料混合,因此,高 电极密度就可以实现。 如充电/放电效率和循环特性:因此,即使以高电极密度,本发明能够具有优良的电化学性能提供负电极活性材料。