| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel and improved wound electrode element for a nonaqueous electrolyte secondary battery and the like capable of improving handleability in a separator manufacturing process, increasing heat resistance and energy density, and suppressing distortion in a wound element.SOLUTION: In order to solve the problem, according to an aspect of the present invention, there is provided a wound electrode element for a nonaqueous electrolyte secondary battery comprising a belt-shaped positive electrode, a belt-shaped negative electrode, a belt-shaped porous film disposed between the belt-shaped positive electrode and the belt-shaped negative electrode, and an adhesion layer formed on a surface of the belt-shaped porous film. The adhesion layer includes fluororesin-containing fine particles, a binder particle which carries the fluororesin-containing fine particles and whose total volume is smaller than the total volume of the fluororesin-containing fine particles, and a heat-resistance filler particle. The average particle size of the binder particle is 100 to 500 nm. The average particle size of the heat-resistance filler particle is 10 to 100 nm.SELECTED DRAWING: Figure 1 |
