Li-rich cathode materials exhibiting non-topotactic reactions and components incorporating same
AssigneeThe Regents of the University of California
InventorsGerbrand Ceder, Jianping Huang
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Abstract
This disclosure provides systems, methods, apparatus, and compositions of matter related to lithium-ion batteries. In one aspect, a lithium metal oxide has a general formula Li1+x(MM′)1−x−yDyO2. M is a redox-active transition metal, M′ is a redox-inactive transition metal, and D is a metal dopant selected from a group consisting of V, Cr, Fe, and Mo. D is not M or M′, and M is not M′. 0<x≤0.2 and 0<y≤0.2. The lithium metal oxide has a cation-disordered rocksalt structure.
Claims20
A lithium metal oxide comprising a cation-disordered rocksalt structure comprising a general formula of Li1.2M0.8−x−yM′yDxO2, wherein:
- M is a redox-active transition metal selected from the group consisting of Mn and Ni;
- M′ is a redox-inactive transition metal Ti;
- D is a metal dopant selected from a group consisting of V, Cr, Fe, and Mo;
- 0<x≤0.2;
- and
- y≥0.4.
A method for manufacturing a lithium metal oxide comprising a cation-disordered rocksalt structure having a general formula of Li1.2M0.8−x−yM′yDxO2, wherein M is a redox-active transition metal selected from the group consisting of Mn and Ni, M′ is a redox-inactive transition metal Ti, D is a metal dopant selected from the group consisting of V, Cr, Fe, and Mo, 0<x≤0.2, and y ≥0.4, the method comprising:
- providing at least one lithium-based precursor;
- providing a redox-active transition metal-based precursor;
- providing a redox-inactive transition metal-based precursor;
- providing a dopant metal-based precursor wherein the metal is D;
- and
- mixing the at least one lithium-based precursor, the redox-active transition metal-based precursor, the redox-inactive transition metal-based precursor, and the dopant metal-based precursor to form a mixture.
Dependencies are inferred from the claim text.