| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an Si-based alloy negative electrode material for power storage device, such as a lithium ion secondary battery and a hybrid capacitor, accompanied by movement of lithium ions at charging/discharging, and a lithium ion battery using the same. <P>SOLUTION: The present invention relates to the Si-based alloy negative electrode material which is alloy powder consisting of a compound phase of an Si phase and an SixCuy phase consisting of SixCuy alloy as an intermetallic compound between an Si and a Cu, and also having a composition of the SixCuy phase such that x<y, no pulverization treatment being carried out after the alloy powder is manufactured; and the lithium-ion battery using the same. <P>COPYRIGHT: (C)2012,JPO&INPIT |
