Positive electrode films for alkali metal polymer batteries and method for making same
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United States of America Patent
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Apr 20, 2010
Grant Date -
Nov 20, 2003
app pub date -
Mar 7, 2003
filing date -
Mar 7, 2002
priority date (Note) -
Expired
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Abstract
A process for extruding a thin positive electrode sheet having at least 40%/wt of solid content for a lithium polymer battery through a single or twin screw extruder is disclosed as well as a positive electrode sheet produced therefrom. A mixture of active cathodic intercalation material, lithium salt and electronic conductive material is mixed with a polymer of the polyether family in a ratio of at least 40% of total weight into the mixing chamber of an extrusion machine and extruded through a classical sheet die into a thin cathode sheet or film onto a substrate in sheet form.
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