Process of manufacturing porous separator for electrochemical power supply
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United States of America Patent
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Nov 21, 2000
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N/A
app pub date -
Mar 31, 1999
filing date -
Mar 31, 1999
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Abstract
A method of forming a porous composite separator layer for an electrochemical cell comprising the steps of printing a thin layer of a separator precursor solution on the surface of one of the electrochemical cell electrodes, curing the thin layer of separator precursor solution so that it transforms into a microporous composite separator structure. In the preferred embodiment, the separator precursor solution is formulated as an ink comprising a silica aerogel filler material dispersed in a solution of chlorinated polyolefin binder which is dissolved in a suitable solvent. The process allows the manufacture of thin and flexible composite separators which are conformally bonded to the underlying electrodes.
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