发明名称 |
LITHIUM-ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM-ION SECONDARY BATTERY, POWER TOOL, ELECTRIC VEHICLE AND POWER STORAGE SYSTEM |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium-ion secondary battery in which cycle characteristics and initial charge-discharge characteristics can be improved. <P>SOLUTION: The lithium-ion secondary battery includes a positive electrode 21, a negative electrode 22, and an electrolytic solution, and a separator 23 provided between the positive electrode 21 and the negative electrode 22 is impregnated with the electrolytic solution. The negative electrode 22 has a negative electrode active material layer 22B including a plurality of negative electrode active material particles, and the negative electrode active material particles include a core section and a coating section coating at least a part of a surface of the core section. The core section includes a silicon-based material (SiO<SB POS="POST">x</SB>:0≥x<0.5), and the coating section includes an amorphous or low-crystalline silicon-based material (SiO<SB POS="POST">y</SB>:0.5≥y≥1.8). <P>COPYRIGHT: (C)2012,JPO&INPIT |
申请公布号 |
JP2011233497(A) |
申请公布日期 |
2011.11.17 |
申请号 |
JP20100242174 |
申请日期 |
2010.10.28 |
申请人 |
SONY CORP |
发明人 |
HIROSE KIICHI;ENDO MOTOKI;FUJINAGA TAKUSHI;KAWASE KENICHI;SEGAMI MASAHARU;IWAMA MASAYUKI |
分类号 |
H01M4/48;H01M4/131;H01M4/36;H01M4/38;H01M4/66;H01M10/052;H01M10/0566 |
主分类号 |
H01M4/48 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|