# US 2019/0173076 A1 · Positive active material for rechargeable lithium battery, preparing method thereof and rechargeable lithium battery comprising positive electrode including positive active material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0173076 A1 - Document ID: US20190173076A1 - Status: Published application - Kind: A1 - Application number: 16/209,659 - Filed: 2018-12-04 - Published: 2019-06-06 - Earliest claimed: 2017-12-04 - Assignees: Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd. - Inventors: Jongmin KIM; Jiyoon KIM; Jinhwa KIM - Web page: https://patentgrep.com/patent/US20190173076A1 ## CPC - H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - C01G 53/504: with the molar ratio of nickel with respect to all the metals other than alkali metals higher than or equal to 0.5, e.g. Li(MzNixCoyMn1-x-y-z)O2 with x ≥ 0.5 - C01G 53/82: Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements - H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis} - H01M 4/1391: of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - H01M 4/364: {as mixtures} - H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy - 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 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - C01P 2004/50: Agglomerated particles - C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer - C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer - C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer - C01P 2006/11: Powder tap density - C01P 2006/12: Surface area - C01P 2006/80: Compositional purity - H01M 2004/028: {Positive electrodes} - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20) - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A positive active material for a rechargeable lithium battery includes a first positive active material including a secondary particle including at least two agglomerated primary particles, where at least one part of the primary particles has a radial arrangement structure, as well as a second positive active material having a monolith structure. The first and second positive active materials may both include nickel-based positive active materials. A method of preparing the positive active material, and a rechargeable lithium battery including a positive electrode including the positive active material are also provided. ## Claims ### Claim 1 A positive active material for a rechargeable lithium battery, comprising: a first positive active material comprising a secondary particle comprising at least two agglomerated primary particles, at least one part of the primary particles having a radial arrangement structure; and a second positive active material having a monolith structure, wherein both of the first positive active material and the second positive active material comprise a nickel-based positive active material. ### Claim 2 (depends on 1) The positive active material of claim 1, wherein the second positive active material is included in an amount of about 10 wt % to about 50 wt % based on a total weight of the positive active material. ### Claim 3 (depends on 1) The positive active material of claim 1, wherein: the secondary particle comprises a radial arrangement structure, or the secondary particle comprises an internal part comprising an irregular porous structure and an external part comprising a radial arrangement structure. ### Claim 4 (depends on 1) The positive active material of claim 1, wherein the primary particles have a plate shape, and a long-axis of at least one part of the primary particles is arranged in a radial direction. ### Claim 5 (depends on 1) The positive active material of claim 1, wherein an average length of the primary particles is about 0.01 μm to about 5 μm. ### Claim 6 (depends on 1) The positive active material of claim 1, wherein an average particle diameter of the second positive active material is about 0.05 μm to about 10 μm. ### Claim 7 (depends on 1) The positive active material of claim 1, wherein a residual lithium concentration in the positive active material is less than or equal to about 1200 ppm. ### Claim 8 (depends on 1) The positive active material of claim 1, wherein the first positive active material is represented by Chemical Formula 1: Lia(Ni1-x-y-zCoxMnyMz)O2, Chemical Formula 1 wherein, in Chemical 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), 0.95≤a≤1.3, x≤(1-x-y-z), y≤(1-x-y-z), 0