Patent ID: 11929502
Assignee: UCHICAGO ARGONNE, LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC H

Claim 10:
11. The method of claim 10, wherein the microparticles comprise a lithium metal oxide of empirical formula LiMO2, wherein M comprises a Ni, Mn, Co, or a combination of two or more thereof, and up to 5 mole percent of one or more additional metal element, M′; the individual microparticles comprise a core of a first layered LMO in which M comprises (a) Ni, Mn, Co, or a combination of two or more thereof; and (b) M′; a 50 to 2000 nm thick coating of a second layered LMO surrounding the core in which M comprises (a) Co, Mn, or a combination thereof; and (b) M′; and an interface region of a third layered LMO between the core and the coating in which M comprises (a) Ni, Co, Mn, or a combination of two or more thereof; and (b) M′; wherein the interface region has a thickness of about 50 to about 2000 nm; the concentrations of M′, Ni, Mn, and Co in the interface region vary in the direction from surface to core; the Ni and Co concentrations are substantially uniform within the core when the core comprises Ni and Co; and the Mn concentration of the core varies by up to about +/−5 percent in nested concentric regions within the core when the core comprises Mn and Co.