UChicago Argonne, LLC

Brandon R Long

Michael M Thackeray

Jason R Croy

Eungje Lee

Joong Sun Park

An electrode material comprising a composite lithium metal oxide, which in an initial state has the formula: y[xLiMO.(1&#x2212;x)LiM'O].(1&#x2212;y)LiMnM&#x2033;O; wherein 0&#x2264;x&#x2264;1; 0.75&#x2264;y&#x3c;1; 0&#x3c;z&#x2264;2; 0&#x2264;d&#x2264;0.2; and z&#x2212;d&#x2264;2. M comprises one or more metal ions that together have an average oxidation state of +4; M&#x2032; comprises one or more metal ions that together have an average oxidation state of +3; and M&#x2033; comprises one or more metal ions that together with the Mn and any excess proportion of lithium, 'd', have a combined average oxidation state between +3.5 and +4. The LiMnM&#x2033;Ocomponent comprises a spinel structure, each of the LiMOand the LiM&#x2032;Ocomponents comprise layered structures, and at least one of M, M&#x2032;, and M&#x2033; comprises Co. Cells and batteries comprising the electrode material also are described.

Cobalt-stabilized lithium metal oxide electrodes for lithium batteries

An electrode for a lithium-ion cell comprising a 'layered-spinel' composite oxide material is disclosed. The 'layered-spinel' can be a material of formula xLiMO.(1&#x2212;x)LiM'O, wherein 0&#x3c;x&#x3c;1; LiMOis a lithium metal oxide having a layered structure in which M comprises one or more transition metals and optionally lithium, and has a combined average oxidation state of +3; and LiM&#x2032;Ois a lithium metal oxide having a spinel structure, 1&#x2264;y&#x2264;1.33, 1.66&#x2264;z&#x2264;2, and M&#x2032; comprises one or more transition metals, and has a combined average metal oxidation state in the range of about +3.5 to about +4.

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Plainfield, IL, United States of America

Brandon R Long