| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a negative electrode active material suppressing particle size reduction caused by expansion and contraction of an active material volume in charge-discharge, and to provide a lithium secondary battery. <P>SOLUTION: The negative electrode active material for the lithium secondary battery is formed by a gas evaporation method, and comprises ultra fine particles having a particle size of 1 nm to 200 nm, and comprising an element capable of alloying with lithium. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
