| 发明名称 | Lithium secondary battery | ||
| 摘要 | A lithium secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a current collector, an active material layer on the current collector and including an amorphous silicon oxide represented by SiOx (0.95<x<1.7), and an SEI layer on the active material layer and including about 70 area % or more of protrusion parts having a size of about 5 nm to 300 nm during charging of the battery. | ||
| 申请公布号 | US8980474(B2) | 申请公布日期 | 2015.03.17 |
| 申请号 | US201213434680 | 申请日期 | 2012.03.29 |
| 申请人 | Samsung SDI Co., Ltd. | 发明人 | Kim Tae-Gon;Chun Hee-Joon;Kim Joon-Sup;Choi Wan-Uk;Tarui Hisaki;Lee Jea-Woan;Ryu Jae-Yul;Lim Young-Chang;Park Seung-Hee |
| 分类号 | H01M4/134;H01M4/62;H01M4/48;H01M10/0525;H01M10/44 | 主分类号 | H01M4/134 |
| 代理机构 | Christie, Parker & Hale, LLP | 代理人 | Christie, Parker & Hale, LLP |
| 主权项 | 1. A lithium secondary battery comprising: a positive electrode, a negative electrode comprising: a current collector,an active material layer on the current collector, the active material layer comprising an amorphous silicon oxide represented by SiOx wherein 0.95<x<1.7 and a carbon layer coated on at least a portion of the amorphous silicon oxide, wherein the carbon layer has a graphitization degree defined by a G peak with a full width at half maximum of about 50 cm−1 to about 110 cm−1 and a D peak with a full width at half maximum of about 70 cm−1 to about 220 cm−1 as evaluated using Raman spectroscopy in which the G peak is defined to have a central value of about 1580±50 cm−1 and the D peak is defined to have a central value of about 1350±50 cm−1, and a solid electrolyte interface (SET) layer on the active material layer and comprising a plurality of particles, wherein during charging of the lithium secondary battery, a surface of the SET layer has about 70 area % or more of protrusion parts having a size ranging from about 5 nm to about 300 nm, and an electrolyte. | ||
| 地址 | Yongin-si KR | ||