Separator for electrochemical element, process for producing separator and electrochemical element using separator
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United States of America Patent
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May 16, 2017
Grant Date -
Mar 5, 2015
app pub date -
Aug 26, 2014
filing date -
Aug 30, 2013
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Abstract
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. The separator for electrochemical element has strong mechanical strength and excellent processability.
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