# US 2025/0096265 A1 · Anode for lithium metal battery, method of preparing the same, and lithium metal battery including the anode > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0096265 A1 - Document ID: US20250096265A1 - Status: Published application - Kind: A1 - Application number: 18/646,685 - Filed: 2024-04-25 - Published: 2025-03-20 - Earliest claimed: 2023-09-20 - Assignees: Samsung SDI Co., Ltd.; Seoul National University R&Db Foundation - Applicants: Samsung SDI Co., Ltd.; Seoul National University R&DB Foundation - Inventors: Heemin Kim; Kanghee Lee; Woojin Bae; Jongseok Moon; Hyunsik Woo; Jongseok Park; Jinhwan Park; Jangwook Choi; Gyuleen Park; Sujin Kim; Sangjin Bae; Jisub Kim - Web page: https://patentgrep.com/patent/US20250096265A1 ## CPC - H01M 4/0404: {by coating on electrode collectors} - H01M 4/583: Carbonaceous material, e.g. graphite-intercalation compounds or CFx - H01M 4/0419: {involving spraying} - H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx - H01M 4/1393: of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx - H01M 4/366: {as layered products} - H01M 4/382: {Lithium (H01M4/405 takes precedence)} - H01M 4/587: for inserting or intercalating light metals - H01M 4/622: {being polymers} - H01M 4/66: Selection of materials - H01M 4/667: {in the form of layers, e.g. coatings} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/0562: Solid materials - H01M 10/0566: Liquid materials - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - H01M 2004/027: {Negative electrodes} - 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 - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Provided are an anode for a lithium metal battery, a lithium metal battery including the same, and a method of preparing the anode, the anode including a current collector, a host layer on the anode current collector and including mesocarbon microbeads (MCMBs), a first MCMB-containing layer including MCMBs and a first lithium-ion conducting polymer, and a second MCMB-containing layer including MCMBs and a second lithium-ion conducting polymer, wherein the first lithium-ion conducting polymer and the second lithium-ion conducting polymer each have an electrical conductivity of 10−8 S/m or less, an amount of the second lithium-ion conducting polymer is greater than that of the first lithium-ion conducting polymer. ## Claims ### Claim 1 An anode for a lithium metal battery, comprising: an anode current collector; a host layer on the anode current collector and comprising mesocarbon microbeads (MCMBs); a first MCMB-containing layer comprising MCMBs and a first lithium-ion conducting polymer; and a second MCMB-containing layer comprising MCMBs and a second lithium-ion conducting polymer, an electrical conductivity of each of the first lithium-ion conducting polymer and the second lithium-ion conducting polymer is 10−8 S/m or less, and an amount of the second lithium-ion conducting polymer is greater than that of the first lithium-ion conducting polymer. ### Claim 2 (depends on 1) The anode as claimed in claim 1, wherein the first lithium-ion conducting polymer and the second lithium-ion conducting polymer each have a lithium-substituting functional group. ### Claim 3 (depends on 1) The anode as claimed in claim 1, wherein the first lithium-ion conducting polymer and the second lithium-ion conducting polymer are each polyethylene oxide, polyacrylonitrile, polymethylmethacrylate, a vinylidenefluoride-hexafluoropropylene copolymer, or a combination thereof. ### Claim 4 (depends on 1) The anode as claimed in claim 1, wherein the amount of the first lithium-ion conducting polymer is in a range of about 3 parts by weight to about 20 parts by weight, based on 100 parts by weight of the total weight of the first MCMB-containing layer. ### Claim 5 (depends on 1) The anode as claimed in claim 1, wherein the amount of the second lithium-ion conducting polymer is in a range of about 5 parts by weight to about 30 parts by weight, based on 100 parts by weight of the total weight of the second MCMB-containing layer. ### Claim 6 (depends on 1) The anode as claimed in claim 1, wherein: a thickness of the host layer to the first MCMB-containing layer is in a range of about 5:1 to about 1:1, and a thickness of the host layer to the second MCMB-containing layer is in a range of about 5:1 to about 1:1. ### Claim 7 (depends on 1) The anode as claimed in claim 1, wherein a thickness of the host layer is in a range of about 10 μm to about 70 μm. ### Claim 8 (depends on 1) The anode as claimed in claim 1, wherein the MCMBs have a size in a range of about 1 μm to about 50 um, a specific surface area in a range of about 0.2 m2/g to about 5 m2/g, and a true density of 2.10 g/cm3 or more. ### Claim 9 (depends on 1) The anode as claimed in claim 1, wherein: a thickness of the first MCMB-containing layer is in a range of about 5 μm to about 30 μm, and a thickness of the second MCMB-containing layer is in a range of about 5 μm to about 30 μm. ### Claim 10 (depends on 1) The anode as claimed in claim 1, wherein lithium metal is comprised in the host layer, between the host layer and the first MCMB-containing layer, in the second MCMB-containing layer, or a combination thereof. ### Claim 11 (depends on 1) The anode as claimed in claim 1, wherein the host layer further comprises a binder. ### Claim 12 (depends on 1) The anode as claimed in claim 1, wherein an amount of the MCMBs in the host layer is in a range of about 85 parts by weight to about 97 parts by weight, based on 100 parts by weight of the total weight of the host layer. ### Claim 13 (depends on 1) The anode as claimed in claim 1, wherein the anode has porosity in a range of about 50% to about 70%, the host layer has porosity in a range of about 50% to about 60%, the first MCMB-containing layer has porosity in a range of about 55% to about 65%, and the second MCMB-containing layer has porosity in a range of about 65% to about 75%. ### Claim 14 (depends on 1) The anode as claimed in claim 1, wherein the first lithium-ion conducting polymer and the second lithium-ion conducting polymer each have an average diameter in a range of about 0.001 nm to about 1,000 nm. ### Claim 15 (depends on 1) A lithium metal battery comprising: a cathode; the anode as claimed in claim 1; and an electrolyte between the cathode and the anode. ### Claim 16 (depends on 15) The lithium metal battery as claimed in claim 15, wherein: the electrolyte comprises a liquid electrolyte, a solid electrolyte, a gel electrolyte, or a combination thereof, the solid electrolyte comprises an oxide-based solid electrolyte, a sulfide-based solid electrolyte, a polymer solid electrolyte, or a combination thereof, and the gel electrolyte comprises a polymer gel electrolyte. ### Claim 17 (depends on 15) The lithium metal battery as claimed in claim 15, further comprising a separator. ### Claim 18 (depends on 15) The lithium metal battery as claimed in claim 15, wherein: the cathode comprises a cathode current collector and a cathode active material layer, at least one selected from the cathode current collector and the anode current collector comprises a base film and a metal layer on one side or two opposing sides of the base film, the base film comprises a polymer, wherein the polymer comprises polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polybutylene terephthalate (PBT), polyimide (PI), or a combination thereof, and the metal layer comprises indium (In), copper (Cu), magnesium (Mg), stainless steel, titanium (Ti), iron (Fe), cobalt (Co), nickel (Ni), zinc (Zn), aluminum (Al), germanium (Ge), lithium (Li), or an alloy thereof. ### Claim 19 (depends on 1) A method of preparing an anode for a lithium metal battery, the method comprising: preparing an anode current collector; forming a host layer on the anode current collector; electrojetting a composition comprising mesocarbon microbeads (MCMBs) and a first lithium-ion conducting polymer; and electrospraying a composition comprising MCMBs and a second lithium-ion conducting polymer, followed by drying, wherein an electric conductivity of each of the first lithium-ion conducting polymer and the second lithium-ion conducting polymer is 10−8 S/m or less, and an amount of the second lithium-ion conducting polymer is adjusted to be greater than that of the first lithium-ion conducting polymer, to prepare the anode as claimed in claim 1. ### Claim 20 (depends on 19) The method as claimed in claim 19, wherein the electrojetting comprises electrospinning or electrospraying.