Manganese oxide composite electrodes for lithium batteries
AssigneeUchicago Argonne, LLC
InventorsMichael M. Thackeray, Christopher S. Johnson, Naichao Li
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Abstract
An activated electrode for a non-aqueous electrochemical cell is disclosed with a precursor of a lithium metal oxide with the formula xLi2MnO3.(1−x)LiMn2−yMyO4 for 0<x<1 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. The electrode is activated by removing lithia, or lithium and lithia, from the precursor. A cell and battery are also disclosed incorporating the disclosed positive electrode.
Claims20
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<x<1 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.
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<x<1 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<x<1 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.
Dependencies are inferred from the claim text.