| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a negative electrode for lithium ion secondary battery and lithium ion secondary battery using the same, capable of achieving high storage amount of lithium ion and excellent cycle characteristics. <P>SOLUTION: The negative electrode for lithium ion secondary battery includes a silicon film with a porosity of 3-20%, which is composed of silicon containing a carbon element of 10-10,000 ppm, on a metal foil, and a lithium ion secondary battery using the negative electrode is also provided. <P>COPYRIGHT: (C)2013,JPO&INPIT |
