| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium-ion secondary battery provided with a porous membrane and capable of suppressing a thermal runaway without undergoing thermal shrinkage with a separator even in a short-circuit test such as a pin penetration test. <P>SOLUTION: A lithium-ion secondary battery comprises a positive electrode made up of lithium oxide composite, a negative electrode made up of materials capable of occluding and releasing the lithium on electrochemical basis, a separator, a non-aqueous electrolyte solution, an inorganic oxide filler, and a binding agent. The secondary battery is provided with the porous membrane intervening between the separator and at least one of the electrodes. The porous membrane has the inorganic oxide filler with the content of 95 to 98 weight%, and exists independent of the electrodes and the separator. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
