NOVELTY - A three-component, layered-layered-spinel composite lithium metal oxide electrode material comprises manganese, metal ion(s) that together have a combined average oxidation state of tetravalence, metal ion(s) that together have a combined average oxidation state of trivalence, and metal ion(s) that together with manganese and excess proportion of lithium have a combined average oxidation state of higher than trivalence.    USE - Three-component, layered-layered-spinel composite lithium metal oxide electrode material is used for positive electrodes of lithium electrochemical cells used in lithium batteries (all claimed). Uses include but are not limited to electric vehicles, portable electronic devices, medical systems, transportation systems, aerospace systems, and defense systems.    ADVANTAGE - The three-component, layered-layered-spinel composite lithium metal oxide electrode material enhances energy of lithium ion batteries and offers significantly higher capacity. The composition arrests voltage fade phenomenon which occurs when existing layered-layered and layered-spinel electrode materials are repeatedly cycled in lithium cells. The composite layered-layered-spinel electrode structures and materials provide a voltage profile with both the sloping character of the layered components and the voltage plateaus of the spinel components, thus smoothing the overall voltage profile of high capacity, structurally-integrated, composite layered-spinel electrode. The low lithium content and increased spinel content increase the first-cycle efficiency of the cell. The surface stability, rate capability, and cycle stability of the electrode material are enhanced. The addition of stabilizing cobalt improves the first cycle efficiency without sacrificing discharge capacity.    DETAILED DESCRIPTION - A three-component, layered-layered-spinel composite lithium metal oxide electrode material, which in an initial state is of formula: y(xLi2MO3.(1-x)LiM'O2).(1-y)Li1+dMn2-z-dM"zO4, where x is 0-1, y is 0.75 or more to less than 1, z is 0-2, d is 0-0.2, z-d is 2 or less, M is metal ion(s) that together have a combined average oxidation state of +4, M' is metal ion(s) that together have a combined average oxidation state of +3, and M" is metal ion(s) that together with manganese and excess proportion, d, of lithium, have a combined average oxidation state of +3.5, and LiM"O4 component comprises a spinel crystal lattice structure, each of the Li2MO3 and LiM"O2 components comprise layered crystal lattice structures, and at least one of M, M' and M" comprises cobalt. INDEPENDENT CLAIMS are included for the following:    (1) positive electrode (16);    (2) lithium electrochemical cell (10); and    (3) lithium battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the electrochemical cell.    Lithium electrochemical cell (10)    Negative electrode (12)    Separator (14)    Metal collector plate (15)    Positive electrode (16)