MICROPOROUS MEMBRANE WITH MACHINED SURFACE AND ITS ELECTROCHEMICAL DEVICE PRODUCED USING IT

FIELD: electricity. ^ SUBSTANCE: invention is attributed to the field of electric engineering, specifically to rechargeable accumulators. In the suggested technical solution porous membrane or porous film contains (a) porous base surface with pores and (b) covering layer formed at least at one area selected from group containing base surface and part of the pores located on base surface at that covering layer includes butadiene-styrene rubber. Also electrochemical device is described where porous film is used as separator. Porous membrane is covered with butadiene-styrene polymer which provides increased scratch resistance and has improved adhesion to other base surfaces. ^ EFFECT: improving mechanical properties of electrochemical devices and improvement of their operation safety. ^ 20 cl, 4 dwg