# US 11,909,031 B2 · Film electrode, resin layer forming ink, inorganic layer forming ink, and electrode printing apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,031 B2 - Document ID: US11909031B2 - Status: Granted - Kind: B2 - Application number: 18/060,045 - Filed: 2022-11-30 - Published: 2023-03-23 - Granted: 2024-02-20 - Earliest claimed: 2017-03-06 - Assignees: Ricoh Company, Ltd. - Applicants: Masahiro Masuzawa; Toru Ushirogochi; Hideo Yanagita; Yuu Zama; Aya Yoshida; Shigeo Takeuchi; Anna Hirowatari; Okitoshi Kimura; Kohji Matsuoka; Keigo Takauji; Miku Ohkimoto - Inventors: Masahiro Masuzawa; Toru Ushirogochi; Hideo Yanagita; Yuu Zama; Aya Yoshida; Shigeo Takeuchi; Anna Hirowatari; Okitoshi Kimura; Kohji Matsuoka; Keigo Takauji; Miku Ohkimoto - Web page: https://patentgrep.com/patent/US11909031B2 ## CPC - H01M 4/139: Processes of manufacture - H01M 4/0402: {Methods of deposition of the material} - H01M 4/0404: {by coating on electrode collectors} - H01M 4/0419: {involving spraying} - H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof - H01M 4/366: {as layered products} - H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers - H01M 4/622: {being polymers} - H01M 4/8832: {Ink jet printing} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 50/461: {with adhesive layers between electrodes and separators} - H01M 4/0414: {by screen printing} - H01M 4/621: {Binders} - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - H01M 2200/00: Safety devices for primary or secondary batteries - 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 A disclosed film electrode includes an electrode base, and an active material layer formed on the electrode base, and a resin layer adhering to at least one of a peripheral portion of the active material layer and a surface of the active material layer in a direction extending along a plane of the electrode base. ## Claims ### Claim 1 An electrode, comprising: an electrode base; an active material layer formed on the electrode base; and a polymer resin film layer adhering to at least one of a peripheral portion of the active material layer and a surface of the electrode base around the active material layer in a direction extending along a plane of the electrode base, wherein a resin in the polymer resin film layer is an acrylic compound having a (poly)ethylene oxide skeleton or an acrylic compound having a side chain soluble with respect to an electrolyte. ### Claim 2 (depends on 1) The electrode according to claim 1, wherein the polymer resin film layer is an electrical insulating film and has at least one partial opening for ionic permeability. ### Claim 3 (depends on 1) The electrode according to claim 1, wherein the polymer resin film layer is formed on both an entire surface of the active material layer, and the surface of the electrode base around the active material layer in the direction extending along the plane of the electrode base. ### Claim 4 (depends on 1) The electrode according to claim 1, wherein the polymer resin film layer is selectively formed on one of a surface of a thin portion having a thickness of at least 20% of an average thickness of the active material layer, and a defect site penetrating through to the surface of the electrode base present in the active material layer. ### Claim 5 (depends on 1) The electrode according to claim 1, wherein the active material layer is present in a vicinity of an end face of the electrode base, and wherein the polymer resin film layer partially permeates the active material layer that is present in the vicinity of the end face of the electrode base. ### Claim 6 (depends on 1) The electrode according to claim 1, wherein the polymer resin film layer has microscopic openings. ### Claim 7 (depends on 1) The electrode according to claim 1, wherein the polymer resin film layer is formed on an entire surface of the active material layer. ### Claim 8 (depends on 1) The electrode according to claim 1, wherein except for a terminal portion of the electrode base, at least one side of an electrode peripheral portion has a length of the electrode base>a length of the active material layer. ### Claim 9 (depends on 1) The electrode according to claim 1, wherein the polymer resin film layer is selectively formed in the vicinity of a terminal end of the electrode base by a liquid ejection head configured to eject a polymer resin film layer forming ink for forming the polymer resin film layer. ### Claim 10 (depends on 1) A method for manufacturing the electrode of claim 1, the method comprising: forming the active material layer on the electrode base, and forming the polymer resin film layer on at least one of the peripheral portion of the active material layer and the surface of the electrode base around the active material layer in the direction extending along the plane of the electrode base. ### Claim 11 (depends on 10) The method according to claim 10, wherein the active material layer is formed by applying an active material layer forming ink, and drying the active material layer forming ink. ### Claim 12 (depends on 10) The method according to claim 10, wherein the polymer resin film layer is formed by applying a polymer resin film layer forming ink comprising the resin, and curing the polymer resin film layer forming ink. ### Claim 13 (depends on 10) The method according to claim 10, wherein the polymer resin film layer is selectively formed in the vicinity of a terminal end of the electrode base by a liquid ejection head configured to eject a polymer resin film layer forming ink for forming the polymer resin film layer. ### Claim 14 (depends on 12) The method according to claim 12, wherein the polymer resin film layer forming ink further comprises a soluble salt. ### Claim 15 (depends on 12) The method according to claim 12, wherein the polymer resin film layer forming ink further comprises a blowing agent. ### Claim 16 (depends on 12) The method according to claim 12, wherein the polymer resin film layer forming ink is obtained by dissolving at least one of the resin and a precursor of the resin in a liquid, and the polymer resin film layer forming ink has viscosity of 150 mPa·s or less at room temperature and a surface tension that is in a range of 15 to 75 mN/m. ### Claim 17 (depends on 16) The method according to claim 16, wherein the precursor comprises a polymerization initiator configured to initiate polymerization upon irradiation with at least one of ionizing radiation and infrared radiation, and a polymerizable compound. ### Claim 18 (depends on 12) The method according to claim 12, wherein the polymer resin film layer forming ink at least comprises: the resin, a binding material, and a solvent; wherein the resin is dispersed in the solvent, the binding material is dispersed in the solvent or dissolved in the solvent, and the polymer resin film layer forming ink has viscosity of 150 mPa·s or less at room temperature and a surface tension that is in a range of 15 to 75 mN/m. ### Claim 19 (depends on 1) The electrode according to claim 1, wherein ion permeability is achieved by adding a blowing agent to the resin, and heating the resin having the blowing agent after coating. ### Claim 20 (depends on 1) The electrode according to claim 1, wherein ion permeability is achieved by adding a soluble salt to the resin, and immersing the resin having the soluble salt, after coating, in an electrolytic solution to dissolve the salt to form openings and pores.