| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a separator for battery which is excellent in oxidation resistance, and to provide a lithium-ion secondary battery which is excellent in the oxidation resistance and lessens deterioration of battery capacity after it is maintained at high temperature and in a charged state for a long period. <P>SOLUTION: The separator 13 for battery includes: a porous film 12 as a base material; and a crosslinked polymer layer 11 held on the porous film 12. The crosslinked polymer layer 11 includes inorganic particles and a crosslinked polymer obtained by reacting a reactive polymer having a functional group in its module with a polyfunctional compound having reactivity to the functional group and thereby crosslinking at least a part of the reactive polymer, and is non-porous. The lithium-ion secondary battery has a positive electrode 14, a negative electrode 15, the separator 13 for a battery arranged between the positive electrode 14 and the negative electrode 15, and a nonaqueous electrolyte. The separator 13 for battery is arranged to make the porous film 12 locate on a negative electrode 15 side, and is arranged to make the crosslinked polymer layer 11 locate on a positive electrode 14 side. <P>COPYRIGHT: (C)2010,JPO&INPIT |
