Method of making stabilized electrochemical cell active material of lithium manganese oxide
AssigneeValence Technology, Inc.
InventorsJeremy Barker, M. Yazid Saidi, Chariclea A. Scordilis-Kelley
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Abstract
A method for forming the composition stabilized against capacity degradation comprises particles of spinel lithium manganese oxide (LMO) enriched with lithium by a decomposition product of lithium carbonate forming a part of each said particle and characterized by a reduced surface area and increased capacity expressed in milliamp hours per gram as compared to non-enriched spinel.
Claims17
A method of treating particles consisting of cubic spinel lithium manganese oxide which comprises the steps of (a) forming a mixture consisting of said cubic spinel lithium manganese oxide particles and lithium carbonate;
- and (b) heating said mixture for a time and at a temperature sufficient to decompose at least a portion of said lithium carbonate, thereby providing treated cubic spinel lithium manganese oxide having increased lithium content as compared to untreated cubic spinel lithium manganese oxide.
A method of treating particles of cubic spinel lithium manganese oxide represented by the formula Li1+xMn2−xO4 with x greater than or equal to zero, which method comprises the steps of (a) forming a mixture comprising said cubic spinel lithium manganese oxide particles and lithium carbonate;
- and (b) heating said mixture for a time and at a temperature sufficient to decompose at least a portion of said lithium carbonate, thereby providing treated cubic spinel lithium manganese oxide particles having increased lithium content represented by the formula Li1+xMn2−zO4, where z is greater than x, and z is less than or equal to 0.20.
Dependencies are inferred from the claim text.