Porous film, separator for cell, and cell

Details Porous film, separator for cell, and cell Porous film, separator for cell, and cell

C - Chemistry, Metallurgy

08

J

C08J 5/18 (2006.01) B01D 67/00 (2006.01) B01D 69/02 (2006.01) B01D 69/14 (2006.01) B01D 71/26 (2006.01) C08L 23/02 (2006.01) H01M 2/16 (2006.01) H01M 2/14 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2360008

A porous thermoplastic resin film capable of functioning well as a separator of a cell is provided. The porous film is constituted with a thermoplastic resin and a filler, wherein X R defined by the following formula: X R = 25 X T GUR X d2 / Y is smaller than 5, where Y (µ m), T GUR (sec/100cc), and d (µm) represent the thickness, the gurley value, and the average pore diameter of said film, respectively. The porous film constructed as shown above can reduce the internal resistance of a cell when used as a separator of the cell.

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