Flexible cathodes

US7967875B2 · kind B2 · utility

Assignee

• The Gillette Company LLC · US

Inventors

• Christopher Boczer · Norwalk, US
• Frank M. Delnick · Albuquerque, US
• Rosauro Del Rosario · Danbury, US
• Minkoo Kang · New Milford, US
• Lucyna M. Pawlowska · Norwalk, US
• Michael Pozin · Brookfield, US
• Dharmendra Rana · Danbury, US
• Maya Stevanovic · Vaughan, CA
• John J. Weckesser · Oxford, US

Key dates

• Filing date: Jun 1, 2010
• Grant date: Jun 28, 2011
• Expiry date: Jun 1, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49115
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

This disclosure relates to methods of making a cathode for a lithium batter. The methods include: (a) treating a cathode current collector with flame or corona; (b) coating a slurry containing iron disulfide, a first solvent, and a binder onto the cathode current collector obtained from step (a) to form a coated cathode current collector, in which the slurry contains about 73-75% by weight solids and the binder contains a polymer selected from the group consisting of linear di- and tri-block copolymers, linear tri-block copolymers cross-linked with melamine resin, ethylene-propylene copolymers, ethylene-propylene-diene terpolymers, tri-block fluorinated thermoplastics, hydrogenated nitrile rubbers, fluoro-ethylene-vinyl ether copolymers, thermoplastic polyurethanes, thermoplastic olefins, and polyvinylidene fluoride homopolymers; and (c) drying the coated cathode current collector obtained from step (b) to provide a cathode, in which the cathode contains no more than 0.5% by volume of the first solvent and is capable of being bent to 180°. This disclosure also relates to methods of making a lithium battery.