| 摘要 |
PROBLEM TO BE SOLVED: To provide a negative electrode material capable of providing high energy density, and having a long cycle life, and to provide a battery using it. SOLUTION: This negative electrode material contains silicon alloy powder having a phase 11 of Si, and a copper/aluminum-containing phase 12 containing Cu and Al. The phase 11 of Si is dispersed in the copper/aluminum-containing phase 12. The copper/aluminum-containing phase 12 contains at least either of an intermetallic compound phase containing Cu and Al as constituent elements and a solid solution phase. When a powder X-ray diffraction analysis regarding the silicon alloy powder is executed, a high-intensity peak can be provided in a range, belonging to the copper/aluminum-containing phase 12, where a diffraction angle 2θis 43.5-44.5°. COPYRIGHT: (C)2005,JPO&NCIPI |
