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US 2006/0040175 A1Published application
Separator for electrochemical devices
OwnerDavid Zuckerbrod, Wen Liuinventors
Life of this patent
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Abstract
A separator for a wound electrochemical device comprising an expanded polytetrafluoroethylene membrane having pores defining an internal surface area, the internal surface area being substantially coated with a pore coating agent, the separator having a longitudinal modulus of greater than 20,000 lbs/in2.
Claims2
A wound battery comprising a first electrode, a second electrode, and a separator disposed between said first and second electrodes, said separator comprising:
- (a) an expanded polytetrafluoroethylene membrane having pores defining an internal surface area and having a longitudinal modulus of about 210,000 lbs/in2, a bubble point of about 32 psi, and a puncture strength of about 4.9 N;
- and
- (b) a silica sol-gel substantially coating said internal surface area.
Dependencies are inferred from the claim text.