| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a negative electrode active material for a power storage excellent in initial charging and discharging efficiency while having high capacity density and excellent cycle characteristics.SOLUTION: The negative electrode active material for a power storage contains SnO of 25 to 75%, PO+SiOof 5 to 55%, LiO+NaO of 4 to 40%, and BOof 0 to 6% at mol% in terms of oxide.</p> |
