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Method for producing a secondary lithium cell comprising a heat-sensitive protective mechanism

United States Patent

January 28, 2003
View the Complete Patent at the US Patent & Trademark Office
A method for producing a secondary lithium cell which has at least one lithium-cycling negative electrode, at least one lithium-intercalating positive electrode, at least one separator disposed between the positive and the negative electrode, and a nonaqueous lithium ion-conducting electrolyte. The method is carried out by the electrodes and/or the separator being coated, by means of electrostatic powder coating, with wax particles which are insoluble in the electrolyte and have a melting temperature of from about 50 to about 150 .degree. C. and a mean particle size of from about 6 to about 20 .mu.m, the amount of wax being between about 0.5 and about 2.5 mg/cm.sup.2 of electrode area.
Ullrich; Matthias (Kelkheim, DE), Bechtold; Dieter (Bad Vilbel, DE), Rabenstein; Heinrich (Frankfurt, DE), Brohm; Thomas (Kelkheim, DE)
09/ 551,132
April 17, 2000
The Government of the United States of America has rights in this invention pursuant to Cooperative Agreement No. DE-F CO2-91CE 50336 awarded by the U.S. Department of Energy.