发明名称 |
SILICON OXIDE AND ANODE MATERIAL FOR LITHIUM ION SECONDARY CELL |
摘要 |
Provided is a silicon oxide in the form of powder, which is used for a negative electrode active material of a lithium-ion secondary battery and is represented by SiO x , wherein, when the silicon oxide is measured by use of an X-ray diffractometer comprising a sealed tube light source as a light source and a high speed detector as a detector, a halo is detected at 20°‰¤2¸‰¤40°, and a peak is detected at the highest quartz line position therein, and the height P1 of the halo and the height P2 of the peak at the highest quartz line position satisfy P2/P1‰¤0.05. This silicon oxide is used as the negative electrode active material, whereby a lithium-ion secondary battery having stable initial efficiency and cycle characteristic can be obtained. The x of the SiO x is preferably 0.7<x<1.5. A negative electrode material for lithium-ion secondary battery contains not less than 20 mass% of this silicon oxide as a negative electrode active material. |
申请公布号 |
EP2477260(A4) |
申请公布日期 |
2013.08.21 |
申请号 |
EP20100815089 |
申请日期 |
2010.06.17 |
申请人 |
OSAKA TITANIUM TECHNOLOGIES CO., LTD. |
发明人 |
KIZAKI, SHINGO;KANNO, HIDEAKI |
分类号 |
H01M4/48;C01B33/113;H01M4/13;H01M4/131;H01M4/134;H01M4/485;H01M10/0525 |
主分类号 |
H01M4/48 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|