Separator for Electrochemical Element, Process for Producing Separator and Electrochemical Element Using Separator

摘要

[Problem to be Solved];To provide a separator for electrochemical element that has strong mechanical strength and excellent processability, and to provide an electrochemical element using the separator for electrochemical element.;[Means for Solving Problem];A separator for electrochemical element, comprising a porous sheet that contains as a main fiber, a fibrillated solvent spun cellulose fiber with an average fiber length of 0.40 to 1.10 mm, has an average internal bond strength of 60 mJ or more in a thickness direction, and has a lowest internal bond strength of 30 mJ or more in the thickness direction, a process for producing the separator, and an electrochemical element using the separator.

主权项

1. A separator for electrochemical element, comprising a porous sheet that contains as a main fiber, a fibrillated solvent spun cellulose fiber with an average fiber length of 0.40 to 1.10 mm, has an average internal bond strength of 60 mJ or more in a thickness direction, and has a lowest internal bond strength of 30 mJ or more in the thickness direction.