ELECTROCHEMICAL CELL SEPARATORS WITH HIGH CRYSTALLINITY BINDERS
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United States of America Patent
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Jul 30, 2002
Grant Date -
Aug 15, 2002
app pub date -
Dec 20, 2000
filing date -
Dec 20, 2000
priority date (Note) -
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Abstract
Provided are alternative fabrication methods and compositions for an electrochemical cell. The methods and compositions of the present invention are particularly, though not exclusively, applicable to the manufacture of polymer-cased lithium-ion secondary battery cells. Briefly, the present invention provides an electrochemical cell fabrication process wherein a PVDF-based binder specifically selected for its physical and chemical properties, in particular, it's high crystallinity, is coated on a porous separator material to form a porous separator. The high crystallinity PVDF of the binder results in improved cell structure and performance.
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