IP Library › Patent Application 11206697
Patent Application
App. No. 11/206,697

Separator for electrochemical devices

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Quick Facts
Patent No.
US None
App. No.
11/206,697
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/in 2 .

Claims (4)

1 . 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/in 2 , 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.

2 . A wound battery as defined in claim 1 further comprising a plurality of said separators.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 14, 2012
From: GORE ENTERPRISE HOLDINGS, INC.
To: W. L. GORE & ASSOCIATES, INC.
Reel/Frame 027906/0508 →