3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Chris J Goodbrake

Kevin Wilmot Eberman

Jerome Edward Scanlan

Thomas P Hedblom

David C May

James P Mathers

Kyung H Moh

Kathleen M Humpal

Roger W Lange

Kathleen A Hachey

Thomas Gabor

Joseph H Eaton

James M O'Kelly

Thomas E Forester

Junwei Jiang

Provided are compositions useful as cathodes in lithium-ion electrochemical cells. The compositions include particles that include transition metal oxides that have at least two distinct phases with different compositions. Each of the distinct phases comprises a layered O3 crystal structure.

Sintered cathode compositions

Single-phase lithium-transition metal oxide compounds containing cobalt, manganese and nickel can be prepared by wet milling cobalt-, manganese-, nickel- and lithium-containing oxides or oxide precursors to form a finely-divided slurry containing well-distributed cobalt, manganese, nickel and lithium, and heating the slurry to provide a lithium-transition metal oxide compound containing cobalt, manganese and nickel and having a substantially single-phase O3 crystal structure. Wet milling provides significantly shorter milling times than dry milling and appears to promote formation of single-phase lithium-transition metal oxide compounds. The time savings in the wet milling step more than offsets the time that may be required to dry the slurry during the heating step.

Solid state synthesis of lithium ion battery cathode material

Durable retroreflective elements

To inhibit agglomeration of fibrous material during composite preparation and to increase transverse strength, particulates such as whiskers have been attached to the fibrous material. Whiskers can be economically grown on the fibrous material while it is transported lengthwise through a heated gaseous mixture under APCVD conditions and the presence of an agent for catalyzing the formation of whiskers. The fibrous material preferably is a roving or tow of a ceramic or carbon.

Continuous method of covering inorganic fibrous material with

Growing community of inventors

Inver Grove Heights, MN, United States of America

Chris J Goodbrake