| 摘要 |
The invention intends to provide a separator for lithium ion secondary battery wherein the separator with porous film used for lithium ion secondary battery include binder, which is capable to contribute for improving film smoothness property of the separator and long term cycle property. The invention provides a separator for lithium ion secondary battery characterized in that ; porous film including nonconductive particles and binder is laminated on organic separator, and said binder includes copolymer comprising monomer unit derived from (meth) acrylonitrile monomerunit and monomer unit derived from (meth) acrylic ester, and a lithium ion secondary battery comprising; a positive electrode, a negative electrode, an electrolyte solution, and said separator. |
