3m Innovative Properties Company

Jerome Edward Scanlan

Kevin Wilmot Eberman

Chris J Goodbrake

Leif Christensen

Ravindra L Arudi

Anthony P Lindert

Dinh Ba Le

Positive electrode for lithium-ion electrochemical cells are provided that have capacity retentions of greater than about 95% after 50 charge-discharge cycles when comparing the capacity after cycle 52 with the capacity after cycle 2 when cycled between 2.5 V and 4.7 V vs. Li/Liat 30&#xb0; C. Compositions useful in the provided positive electrodes can have the formula, Li(NiMnCo)O, wherein 0.05&#x2266;x&#x2266;0.10, a+b+c=1, 0.6&#x2266;b/a&#x2266;1.1, c/(a+b)&#x3c;0.25, and a, b, and c are all greater than zero. The process of making these positive electrodes includes firing the compositions at 850&#xb0; C. to 925&#xb0; C.

High capacity positive electrodes for use in lithium-ion electrochemical cells and methods of making same

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

Electrolyte compositions for use in cells and batteries that include a crosslinked solid ionically conductive polymer having urethane groups, urea groups, thiocarbamate groups, or combinations thereof, particles, and a salt. Certain electrolyte compositions include a liquid thereby forming a gel electrolyte composition.

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Saint Paul, MN, United States of America

Jerome Edward Scanlan