Electrically conductive, freestanding microporous polymer sheet
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United States of America Patent
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Feb 25, 2003
Grant Date -
N/A
app pub date -
Feb 18, 2000
filing date -
Feb 19, 1999
priority date (Note) -
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Abstract
A freestanding, microporous polymer sheet (52, 56) is composed of a polymer matrix binding and electrically conductive matrix. The polymer matrix preferably includes UHMWPE, and the electrically conductive matrix preferably is in powder form. The UHMWPE is of a molecular weight that provides sufficient molecular chain entanglement to form a sheet, with freestanding characteristics. Multiple microporous sheets (30) can be wound or stacked in a package filled with an electrolyte to function as electrodes in an energy storage device (86), such as a battery. Metallic layers (81, 83) can be applied to the microporous sheets to function as current collectors in such devices.
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