| 发明名称 |
LITHIUM ION SECONDARY BATTERY |
| 摘要 |
Provided is a lithium ion secondary battery which is improved particularly in a low-temperature characteristic. The lithium ion secondary battery disclosed herein includes a ternary positive electrode active material formed of a lithium transition metal composite oxide having at least Ni, Co, and Mn, and a carbon-black-adhered carbon-based negative electrode active material which is formed of a carbon material having a graphite structure in at least part thereof and which has carbon black (CB) that has adhered to at least part of a surface portion. A molar ratio x of Ni calculated by taking a total molar amount of Ni, Co, and Mn in the ternary positive electrode active material as 100 satisfies the condition of 34≦x≦46, and a mass ratio a of carbon black calculated by taking a total mass of the carbon material and carbon black in the carbon-black-adhered carbon-based negative electrode active material as 100 satisfies the condition of 0.3≦α≦5. |
| 申请公布号 |
US2017040609(A1) |
申请公布日期 |
2017.02.09 |
| 申请号 |
US201615226094 |
申请日期 |
2016.08.02 |
| 申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
TAKAHATA Koji |
| 分类号 |
H01M4/525;H01M10/0587;H01M4/131;H01M10/0569;H01M4/587;H01M4/133;H01M4/62;H01M10/0568;H01M10/0525;H01M4/505 |
主分类号 |
H01M4/525 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A lithium ion secondary battery comprising a positive electrode, a negative electrode, and a nonaqueous electrolytic solution,
the positive electrode including a ternary positive electrode active material formed of a lithium transition metal composite oxide having at least nickel (Ni), cobalt (Co), and manganese (Mn), and the negative electrode including a carbon-black-adhered carbon-based negative electrode active material which is formed of a carbon material having a graphite structure in at least part thereof and which has carbon black (CB) that has adhered to at least part of a surface portion, wherein a molar ratio x of nickel (Ni) calculated by taking a total molar amount of nickel (Ni), cobalt (Co), and manganese (Mn) in the ternary positive electrode active material as 100 satisfies the following condition:
34≦x≦46, and a mass ratio α of carbon black (CB) calculated by taking a total mass of the carbon material and carbon black in the carbon-black-adhered carbon-based negative electrode active material as 100 satisfies the following condition:
0.3≦α≦5. |
| 地址 |
Toyota-shi JP |
