Back to results
US 6,444,356 B1Granted
Lithium battery with secondary battery separator
OwnerJackson C. Ma, El-Sayed Megahed +4inventors
InventorsJackson C. Ma, El-Sayed Megahed, Timothy J. Stachoviak, Shirley A. Craanen, Daniel A. Schneider, Joseph P. Nestler
Life of this patent
Estimating the term…
Abstract
A secondary battery separator comprises a fibrous core coated with a polymer having improved electrode adhesion properties in unitary laminated construction. Vacuum removal of plasticizer without solvent extraction prevents brittleness and results in microporosity in a thin layer of enhanced ion conductivity.
Claims1
A polymer lithium or lithium ion battery comprising:
- a housing;
- electrodes contained in the housing, the electrodes including a carbonaceous or other lithium intercalation anode and a lithium metal oxide cathode;
- an electrolyte solution in the housing, the electrolyte solution containing a lithium metal salt capable of ionizing in an organic solvent, said salt being dispersed in said organic solvent;
- current collectors electrically connected to the electrodes and disposed in contact with the electrodes;
- and
- a separator disposed between the electrodes, the separator including a fibrous matrix core having opposite surfaces and a solvent cast porous polymeric coating layer applied to at least one of said surfaces, wherein the solvent cast porous polymeric coating comprises polyvinylidene difluoride or polytetrafluoroethylene.
3 more elements
Dependencies are inferred from the claim text.