FIELD: electricity.
SUBSTANCE: according to the invention, the organic/inorganic composite divider includes (a) a polyolefin porous substrate having pores; (b) a porous active layer containing a mixture of inorganic particles and a bonding polymer therewith at least one surface of the polyolefin porous substrate is covered where the said porous active layer has flaking strength equal to 5 g.wt/cm or higher while the divider thermal setting after maintenance at 150°C during 1 hour is equal to 50% or less in the machine direction or in the cross direction.
EFFECT: prevention of electrical short circuit between electrodes.
21 cl, 6 dwg, 1 tbl, 4 ex
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