公开(公告)号：EP2736105A1

公开(公告)日：2014-05-28

申请号：EP13805172.7

申请日：2013-06-12

申请人： Sango Co., Ltd. ,  City Of Nagoya

发明人： IZUHARA Kouichi ,  DAIFUKU Makoto ,  MIYATA Yasushi

IPC分类号： H01M4/134 ,  H01M4/1395 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M4/66

CPC分类号： H01M4/583 ,  C23C16/26 ,  C23C16/5096 ,  C23C16/513 ,  H01M4/0428 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/362 ,  H01M4/386 ,  H01M4/625 ,  H01M4/661 ,  Y02E60/122 ,  Y02P70/54

摘要： Provided is a negative electrode having a new structure for realizing a lithium secondary battery having increased charging/discharging capacities and a battery capacity that is reduced less due to repeated charging/discharging. The negative electrode for a lithium secondary battery includes a current collector substrate; a carbon nanochips layer including graphene sheets grown to incline in irregular directions independently from the current collector substrate; and a silicon thin film layer on the carbon nanochips layer, in which gaps among the carbon nanochips are formed between the silicon thin film layer and the current collector substrate. The Raman spectrum of graphite forming the carbon nanochips layer has a g/d ratio of 0.30 to 0.80, both inclusive, and the crystallinity level of the graphite is lower than that of graphite forming carbon nanowalls. The carbon nanochips layer can be formed by a plasma CVD method using a gaseous mixture of methane and hydrogen, for example.

摘要翻译： 提供一种具有用于实现具有增加的充电/放电容量的锂二次电池和由于重复充电/放电而减少的电池容量的新结构的负极。 锂二次电池用负极包括集电体基板， 碳纳米芯片层，包括生长成独立于集电体基板的不规则方向倾斜的石墨烯片; 以及碳纳米片层上的硅薄膜层，其中在硅薄膜层和集电体基板之间形成碳纳米芯片之间的间隙。 形成碳纳米芯片层的石墨的拉曼光谱的g / d比为0.30〜0.80，石墨的结晶度低于形成碳纳米壁的石墨的结晶度。 例如，可以通过使用甲烷和氢气的气体混合物的等离子体CVD法形成碳纳米芯片层。

公开(公告)号：EP2913870A1

公开(公告)日：2015-09-02

申请号：EP13850911.2

申请日：2013-10-23

申请人： Sango Co., Ltd. ,  City Of Nagoya

发明人： IZUHARA Kouichi ,  DAIFUKU Makoto ,  MIYATA Yasushi

IPC分类号： H01M4/133 ,  C01B31/02 ,  H01M4/1393 ,  H01M4/66

CPC分类号： H01M4/587 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/182 ,  H01M4/0428 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/661 ,  H01M10/0525 ,  Y02P70/54

摘要： [Problem] To provide a negative electrode for a lithium-ion secondary cell, the negative electrode being configured in a novel manner, having a charge-discharge capacity, as determined per unit weight of the carbon used in the electrode, that is markedly higher than the theoretical capacity of graphite, and having a surface that is stabilized against repeated charging and discharging; and to provide a lithium-ion secondary cell in which the electrode is used, the cell having an extremely high charge-discharge capacity. [Solution] A negative electrode for a lithium-ion secondary cell in which a carbon layer obtained by building up and growing a graphene sheet is formed on the surface of a substrate comprising an iron-based metal, the carbon layer being formed in a diagonal direction in relation to the substrate, and the carbon layer being used as the surface of the negative electrode. As measured using an argon laser having a wavelength of 532 nm, the Raman spectrum of the graphite that constitutes the carbon nanochip layer has a g/d ratio of 0.30-0.80.

摘要翻译： 为了提供一种用于锂离子二次电池的负极，以新颖的方式配置负极，其具有如电极中使用的每单位重量碳所确定的充放电容量，其显着地高 比石墨的理论容量大，并具有稳定的反复充放电的表面; 并且提供其中使用电极的锂离子二次电池，该电池具有极高的充放电容量。 [解决方案]一种锂离子二次电池用负极，其中，在包含铁基金属的基板的表面上形成有通过建立和生长石墨烯片而获得的碳层，所述碳层形成为对角线 相对于基板的方向，碳层用作负极的表面。 使用波长为532nm的氩激光器测定，构成碳纳米芯片层的石墨的拉曼光谱的g / d比为0.30〜0.80。