Electrochemical device with improved cycle characteristics
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United States of America Patent
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Jul 15, 2014
Grant Date -
Oct 4, 2012
app pub date -
Jun 15, 2012
filing date -
Oct 5, 2010
priority date (Note) -
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Abstract
Disclosed is an electrochemical device. The electrochemical device includes: (a) a composite separator including a porous substrate, a first porous coating layer coated on one surface of the porous substrate, and a second porous coating layer coated on the other surface of the porous substrate; (b) an anode disposed to face the first porous coating layer; and (c) a cathode disposed to face the second porous coating layer. The first and second porous coating layers are each independently composed of a mixture including inorganic particles and a binder polymer. The first porous coating layer is thicker than the second porous coating layer. The electrochemical device has good thermal stability and improved cycle characteristics.
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