# US 11,444,280 B2 · Nickel-based active material precursor for lithium secondary battery, preparation method thereof, nickel-based active material for lithium secondary battery formed therefrom, and lithium secondary battery including cathode including the nickel-based active material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,280 B2 - Document ID: US11444280B2 - Status: Granted - Kind: B2 - Application number: 16/539,768 - Filed: 2019-08-13 - Published: 2020-02-20 - Granted: 2022-09-13 - Earliest claimed: 2018-08-14 - Assignees: Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd. - Inventors: Doyu Kim; Wooyoung Yang - Web page: https://patentgrep.com/patent/US11444280B2 ## CPC - H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy - H01M 4/366: {as layered products} - H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 2004/028: {Positive electrodes} - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY ## Abstract Provided is a nickel-based active material precursor for a lithium secondary battery, including: a secondary particle including a plurality of particulate structures, wherein each of the particulate structures includes a porous core portion and a shell portion including primary particles radially arranged on the porous core portion, and in 50% or more of the primary particles constituting a surface of the secondary particle, a major axis of each of the primary particles is aligned along a normal direction of the surface of the secondary particle. When the nickel-based active material precursor for a lithium secondary battery is used, it is possible to obtain a nickel-based active material which intercalates and deintercalates lithium and has a short diffusion distance of lithium ions. ## Claims ### Claim 1 A nickel-based active material precursor for a lithium secondary battery comprising: a secondary particle comprising a plurality of particulate structures, each particulate structure having a radial center, wherein the secondary particle comprises a plurality of radial centers, wherein each particulate structure comprises a plurality of primary particles, wherein each of the particulate structures comprises a porous core portion and a shell portion comprising primary particles radially arranged on the porous core portion, and wherein, in 50% or more of the primary particles constituting a surface of the secondary particle, a major axis of each of the primary particles is aligned along a normal direction of the surface of the secondary particle, wherein a porosity in the porous core portion are larger than the porosity in the shell portion. ### Claim 2 (depends on 1) The nickel-based active material precursor of claim 1, wherein, in 60% to 80% of the primary particles constituting the surface of the secondary particle, the major axis of each of the primary particles is aligned along a normal direction of the surface of the secondary particle. ### Claim 3 (depends on 1) The nickel-based active material precursor of claim 1, wherein, each of the primary particles comprises a plate particle, a major axis of the plate particle is arranged in a normal direction of the surface of the secondary particle, and a ratio of a thickness to a length of the plate particle is 1:2 to 1:20. ### Claim 4 (depends on 1) The nickel-based active material precursor of claim 1, wherein, in 50% or more of the primary particles constituting the surface of the secondary particle, a major axis of each of the primary particles is arranged along a normal direction of a (110) crystal plane of the primary particles constituting the surface of the secondary particle. ### Claim 5 (depends on 1) The nickel-based active material precursor of claim 1, wherein, the secondary particle comprises particulate structures arranged in a multi-center isotropic array. ### Claim 6 (depends on 1) The nickel-based active material precursor of claim 1, wherein, the porous core portion has a pore size of about 150 nm to about 1 μm and a porosity of about 5% to about 15%, and the shell portion has a porosity of about 1% to about 5%. ### Claim 7 (depends on 1) The nickel-based active material precursor of claim 1, wherein, the nickel-based active material precursor is a compound represented by Formula 1 below: Ni1-x-y-zCoxMnyMz(OH)2 [Formula 1] in Formula 1, M is an element selected from boron (B), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), titanium (Ti), vanadium (V), chromium (Cr), iron (Fe), copper (Cu), zirconium (Zr), and aluminum (Al), and x≤(1-x-y-z), y≤(1-x-y-z), 0