# US 2026/0100348 A1 · Positive electrode, rechargeable lithium battery including the same, and method of manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0100348 A1 - Document ID: US20260100348A1 - Status: Published application - Kind: A1 - Application number: 19/345,665 - Filed: 2025-09-30 - Published: 2026-04-09 - Earliest claimed: 2024-10-08 - Assignees: Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd. - Inventors: Minah CHA; Hoseong HWANG; Jongjin LEE; JinYoung KIM - Web page: https://patentgrep.com/patent/US20260100348A1 ## CPC - H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - C01G 53/42: containing alkali metals, e.g. LiNiO2 - H01M 4/0404: {by coating on electrode collectors} - 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 4/366: {as layered products} - 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 4/625: {Carbon or graphite} - H01M 10/052: Li-accumulators - C01P 2002/54: one element only - C01P 2004/03: obtained by SEM - C01P 2006/40: Electric properties - 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 Disclosed are positive electrodes, rechargeable lithium batteries including the positive electrode, and methods of manufacturing the positive electrode. The positive electrode includes a current collector and a positive electrode active material layer on the current collector. The positive electrode active material layer comprises a first positive electrode active material that comprises lithium-nickel-based composite oxide and has a bare form without a carbon coating on a surface thereof, a second positive electrode active material that comprises lithium-nickel-based composite oxide and has a core and a carbon coating layer on the core, a conductive material that comprises a carbon-based material, and a binder. ## Claims ### Claim 1 A positive electrode, comprising: a current collector; and a positive electrode active material layer on the current collector, wherein the positive electrode active material layer comprises: a first positive electrode active material that comprises a lithium-nickel-based composite oxide, the first positive electrode active material having a bare form without a carbon coating on a surface thereof; a second positive electrode active material that comprises a lithium-nickel-based composite oxide, the second positive electrode active material comprising a core and a carbon coating layer on the core; a conductive material that comprises a carbon-based material; and a binder. ### Claim 2 (depends on 1) The positive electrode as claimed in claim 1, wherein the first positive electrode active material comprises at least one selected from among a large particle and a small particle. ### Claim 3 (depends on 1) The positive electrode as claimed in claim 1, wherein the second positive electrode active material comprises at least one selected from among a large particle and a small particle. ### Claim 4 (depends on 1) The positive electrode as claimed in claim 1, wherein the core comprises the lithium-nickel-based composite oxide, and the carbon coating layer comprises graphene. ### Claim 5 (depends on 1) The positive electrode as claimed in claim 1, wherein the carbon coating layer is on a portion of a surface of the core. ### Claim 6 (depends on 1) The positive electrode as claimed in claim 1, wherein the carbon coating layer exposes a portion of a surface of the core. ### Claim 7 (depends on 1) The positive electrode as claimed in claim 1, wherein a total amount of the first positive electrode active material and the second positive electrode active material is in a range of about 97 wt % to about 99.5 wt % based on a total weight of 100 wt % of the positive electrode active material layer. ### Claim 8 (depends on 1) The positive electrode as claimed in claim 1, wherein a weight ratio of the first positive electrode active material to the second positive electrode active material is in a range of about 49:51 to about 20:80. ### Claim 9 (depends on 1) The positive electrode as claimed in claim 1, wherein an amount of the conductive material is in a range of about 0.5 wt % to about 2 wt % based on a total weight of 100 wt % of the positive electrode active material layer. ### Claim 10 (depends on 1) The positive electrode as claimed in claim 1, wherein a ratio of a weight of the conductive material to a total weight of the first positive electrode active material and the second positive electrode active material is in a range of about 1/99.5 to about 1/97. ### Claim 11 (depends on 1) The positive electrode as claimed in claim 1, wherein the carbon-based material comprises at least one selected from among natural graphite, artificial graphite, carbon black, acetylene black, Ketjen black, carbon fiber, carbon nano-fiber, and carbon nano-tube. ### Claim 12 (depends on 1) A rechargeable lithium battery comprising the positive electrode as claimed in claim 1. ### Claim 13 (depends on 12) The rechargeable lithium battery as claimed in claim 12, wherein the rechargeable lithium battery has a capacity retention rate of equal to or greater than about 86% after 100 cycles of charge and discharge at about 0.33 C/1.0 C at about 40° C. to about 60° C. ### Claim 14 A method, comprising: preparing a first positive electrode active material that comprises a lithium-nickel-based composite oxide; performing a dry coating a lithium-nickel-based composite oxide with graphene to form a second positive electrode active material; forming a slurry that comprises the first positive electrode active material, the second positive electrode active material, a conductive material, a binder, and a solvent; and coating, drying, and pressing the slurry on a current collector, wherein the method is a method of manufacturing a positive electrode. ### Claim 15 (depends on 14) The method as claimed in claim 14, wherein the dry coating is performed at a rotation speed of about 2,000 rpm to about 3,000 rpm. ### Claim 16 (depends on 14) The method as claimed in claim 14, wherein the dry coating is performed for about 5 minutes to about 15 minutes. ### Claim 17 (depends on 14) The method as claimed in claim 14, wherein the dry coating comprises mixing the lithium-nickel-based composite oxide and the graphene. ### Claim 18 (depends on 14) The method as claimed in claim 14, wherein, in forming the second positive electrode active material, a weight ratio of the lithium-nickel-based composite oxide to the graphene is in a range of about 99:1 to about 99.99:0.01. ### Claim 19 (depends on 14) The method as claimed in claim 14, wherein, in forming the slurry, a weight ratio of the first positive electrode active material to the second positive electrode active material is in a range of about 49:51 to about 20:80. ### Claim 20 (depends on 14) The method as claimed in claim 14, wherein, in forming the slurry, a ratio of a weight of the conductive material to a total weight of the first and second positive electrode active materials is in a range of about 1/99.5 to about 1/97.