| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a separator with a heat-resisting insulating layer for attaining a nonaqueous electrolyte secondary battery which is excellent on both safety and high-temperature cycle characteristics in overheating even when used charge upper limit voltage is set up at a high level in a nonaqueous electrolyte secondary battery. <P>SOLUTION: The separator 14 with a heat-resisting insulating layer includes a polyolefin layer 14A, and the heat-resisting insulating layer 14B including a heat-resistant resin and oxidation-resistant ceramic particles on its one side or both sides. The nonaqueous electrolyte secondary battery includes a positive electrode 11, a negative electrode 12, the separator with a heat-resisting insulating layer, and a nonaqueous electrolyte, and an open circuit voltage at a full-charged state per a pair of the positive electrode and the negative electrode is set up to be 4.25-4.55 V. The heat-resisting insulating layer includes the oxidation-resistant ceramic particles at a ratio of 80-90%, and is arranged between at least the positive electrode and the polyolefin layer. <P>COPYRIGHT: (C)2011,JPO&INPIT |
