Patent ID: 9725566
Date: 2017-08-08
CPC Classifications: B01D,B29B,B29C,B29K,B29L,C08J,C08K,C08L,H01M,Y02E,Y02P,Y10T

Claim:
1. An electrochemical cell comprising: an anode; a cathode; an electrolyte; a housing; a separator, where said separator is a microporous material made from a precursor material where said microporous material has a reduction of thickness of 5% or more from said precursor material; said microporous material comprises: an ultrahigh molecular weight polyethylene (UHMWPE) and a particulate silica filler distributed throughout said microporous material; said filler constitutes from about 5 percent to 95 percent by weight of said microporous material; said microporous material has a network of interconnecting pores communicating throughout said microporous material, said pores constituting at least 45 percent by volume of said microporous material, and said pores have a diameter no greater than 0.6 microns; and said microporous material has a machine direction (MD) tensile strength of greater than 25 N/mm