Separator for nonaqueous secondary battery, and nonaqueous secondary battery
AssigneeTeijin Limited
InventorSatoshi Nishikawa
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Abstract
An object of the invention is to provide a separator for a nonaqueous secondary battery, which has good adhesion to electrodes and is also capable of ensuring sufficient ion permeability even after attachment to an electrode. The separator for a nonaqueous secondary battery of the invention includes a porous substrate and an adhesive porous layer formed on at least one side of the porous substrate and containing a polyvinylidene-fluoride-based resin. The separator for a nonaqueous secondary battery is characterized in that the adhesive porous layer has a crystallinity of 20 to 35%.
Claims10
A separator for a nonaqueous secondary battery, comprising a porous substrate and an adhesive porous layer that is formed on at least one side of the porous substrate and contains a polyvinylidene-fluoride-based resin,
- the separator for a nonaqueous secondary battery being characterized in that the adhesive porous layer has a crystallinity of 20 to 35%.
Dependencies are inferred from the claim text.