Manganese oxide composite electrodes for lithium batteries
AssigneeUchicago Argonne, LLC
InventorsChristopher S. Johnson, Sun-Ho Kang, Michael M. Thackeray
Life of this patent
Estimating the term…
Abstract
An activated electrode for a non-aqueous electrochemical cell is disclosed with a precursor thereof a lithium metal oxide with the formula x{zLi2MnO3.(1−z)LiM′O2}.(1−x)LiMn2−yMyO4 for 0<x<1; 0≦y≦0.5; and 0<z<1, comprised of layered zLi2MnO3.(1−z)LiM′O2 and spinel LiMn2−yMyO4 components, physically mixed or blended with one another or separated from one another in a compartmentalized electrode, in which M is one or more metal ions, and in which M′ is selected from one or more first-row transition metal ions, The electrode is activated by removing lithium and lithia, from the precursor. A cell and battery are also disclosed incorporating the disclosed positive electrode.
Claims17
An activated electrode for a non-aqueous electrochemical cell, having as a precursor thereof a lithium metal oxide with the formula xLi2MnO3.(1−x)LiMn2−yMyO4 for 0.5<x<1.0 such that the spinel component constitutes less than 50 mole % of the precursor electrode and 0≦y<1 in which the Li2MnO3 and LiMn2−yMyO4 components have layered and spinel-type structures, respectively, and in which M is one or more metal cations, said activated electrode being activated by removing lithia, or lithium and lithia, from said precursor, wherein the Li2MnO3 component of the electrode precursor is replaced by a layered xLi2MnO3.(1−x)LiM′O2 component in which M′ is selected from one or more first-row transition metal ions and 0<x<1.
An activated electrode for a non-aqueous electrochemical cell, having as a precursor thereof a lithium metal oxide with the formula xLi2MnO3.(1−x)LiMn2−yMyO4 for 0.5<x<1.0 and 0≦y<1 in which the Li2MnO3 and LiMn2−yMyO4 components have layered and spinel-type structures, respectively, and in which M is one or more metal cations, said activated electrode being activated by removing lithia, or lithium and lithia, from said precursor, wherein either the Li2MnO3 or LiMn2−yMyO4 component of the electrode precursor is replaced by a Li2O.zMnO2 component that does not have a layered- or a spinel-type structure such that the spinel component constitutes less than 50 mole % of the precursor electrode.
Dependencies are inferred from the claim text.