A porous membrane for a secondary battery inclulding non-conductive particles and a binder for a porous membrane, wherein the non-conductive particles are spherical polymer particles having a rough surface, the particles satisfy the expression 1.2 ¤ (SB) ...

A method for manufacturing a lithium ion polymer battery is provided in which in injecting electrolyte into a lithium ion polymer battery, the battery cell is immersed in an electrolyte impregnation bath to allow the electrolyte to be impregnated into the ...