| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery capable of obtaining high capacity and suppressing bulge. <P>SOLUTION: A negative electrode active substance layer 13B contains Si and O as components. The O content of the negative electrode active substance layer 13B ranges from 3 atom% to 45 atom%. An electrolyte is impregnated into a separator 15. The electrolyte contains sultone having an unsaturated bond in a ring, such as 1,3-propene sultone. Preferably, the electrolyte also contains cyclic carbonate having an unsaturated bond, such as vinylene carbonate, or 4-fluoro-1,3-dioxolane-2-on further. <P>COPYRIGHT: (C)2007,JPO&INPIT |
