The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 2014
Filed:
May. 23, 2008
Maya Stevanovic, Danbury, CT (US);
Michael Pozin, Brookfield, CT (US);
Yelena Kouznetsova, Brookfield, CT (US);
Steven J. Specht, Brookfield, CT (US);
Fred J. Berkowitz, New Milford, CT (US);
Maya Stevanovic, Danbury, CT (US);
Michael Pozin, Brookfield, CT (US);
Yelena Kouznetsova, Brookfield, CT (US);
Steven J. Specht, Brookfield, CT (US);
Fred J. Berkowitz, New Milford, CT (US);
The Gillette Company, Boston, MA (US);
Abstract
A primary cell having an anode comprising lithium or lithium alloy and a cathode comprising iron disulfide (FeS) or a mixture of iron disulfide (FeS) and iron sulfide (FeS) and conductive carbon particles. A cathode slurry is prepared comprising the FeSor FeSplus FeS powder, conductive carbon, binder, and a solvent. The binder is preferably a styrene-ethylene/butylene-styrene (SEBS) block copolymer. There is an advantage discovered in utilizing a hydronaphthalene solvent to form the cathode slurry. The preferred solvent is 1,2,3,4-tetrahydronaphthalene or decahydronaphthalene and mixtures thereof. The slurry mixture is coated onto a conductive substrate and the solvent evaporated leaving a dry cathode coating on the substrate. Higher drying temperature may be used resulting in a dry cathode coating which resists cracking. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.