# US 10,121,607 B2 · Ceramic separator for ultracapacitors > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,121,607 B2 - Document ID: US10121607B2 - Status: Granted - Kind: B2 - Application number: 14/166,523 - Filed: 2014-01-28 - Published: 2015-02-26 - Granted: 2018-11-06 - Earliest claimed: 2013-08-22 - Assignees: Corning Incorporated - Applicants: Corning Incorporated - Inventors: Felipe Miguel Joos; Satyanarayana Kodali; Atul Kumar; Charles Warren Lander; Kamjula Pattabhirami Reddy; Huthavahana Kuchibhotla Sarma - Web page: https://patentgrep.com/patent/US10121607B2 ## CPC - H01G 11/52: Separators - H01G 11/32: Carbon-based - H01G 11/86: specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34) - H01M 50/403: Manufacturing processes of separators, membranes or diaphragms - H01M 50/446: Composite material consisting of a mixture of organic and inorganic materials - H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes - Y02E 60/10: Energy storage using batteries - Y02E 60/13: Energy storage using capacitors - Y02E 60/50: Fuel cells - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - 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 separator such as for an electrochemical double layer capacitor includes acicular inorganic particles that are dried to form a porous membrane. Example inorganic particles are calcium silicate particles. A deposition method implementing slurry that includes the acicular inorganic particles and a dispersing medium along with a binder material can be used to form the separator layer directly on electrode materials. ## Claims ### Claim 1 A device comprising: an integrated separator comprising an electrode layer and a separator layer disposed adjacent to a first surface of the electrode layer, wherein the separator layer comprises a binder and acicular ceramic particles, and the separator layer is at least partially coated with a metal-ligand complex; and a current collector disposed adjacent to a second surface of the electrode layer, wherein the metal-ligand complex comprises (a) a metal selected from the group consisting of copper, zinc, nickel, cobalt, iron, chromium, titanium, manganese, vanadium, magnesium, aluminum, platinum, palladium, rhodium, and ruthenium and (b) a ligand selected from the group consisting of acetate, trifluoroacetate, benzoate, triflate, ammonia, and pyridine, and the metal-ligand complex is an electron sink that traps anions during operation of the device by displacing a ligand on the metal-ligand complex. ### Claim 2 (depends on 1) The device of claim 1, wherein the acicular ceramic particles comprise a ceramic material selected from the group consisting of calcium silicate, alumina fibers, magnesium aluminosilicate glass fibers, titania fibers, and combinations thereof. ### Claim 3 (depends on 1) The device of claim 1, wherein the acicular ceramic particles comprise calcium silicate. ### Claim 4 (depends on 1) The device of claim 1, wherein the separator layer consists essentially of calcium silicate and the binder. ### Claim 5 (depends on 1) The device of claim 1, wherein the separator layer comprises 75 to 98 wt. % ceramic particles and 2 to 25 wt. % binder. ### Claim 6 (depends on 1) The device of claim 1, wherein the binder is selected from the group consisting of ethylcellulose, a self-crosslinking acrylic polymer, styrene butadiene rubber, polyvinylidene fluoride, polytetrafluoroethylene, latex-based binders and combinations thereof. ### Claim 7 (depends on 1) The device of claim 1, wherein the electrode layer comprises activated carbon. ### Claim 8 (depends on 1) The device of claim 1, wherein the electrode layer comprises activated carbon, carbon black, and a binder. ### Claim 9 (depends on 1) The device of claim 1, wherein the acicular ceramic particles have an aspect ratio of at least 2:1. ### Claim 10 A device comprising: an integrated separator comprising a separator layer and an electrode layer, wherein the integrated separator comprises opposing surfaces disposed adjacent to first and second current collectors; and an electrolyte, wherein the separator layer comprises a binder and acicular ceramic particles, the separator layer is at least partially coated with a metal-ligand complex comprising (a) a metal selected from the group consisting of copper, zinc, nickel, cobalt, iron, chromium, titanium, manganese, vanadium, magnesium, aluminum, platinum, palladium, rhodium, and ruthenium and (b) a ligand selected from the group consisting of acetate, trifluoroacetate, benzoate, triflate, ammonia, and pyridine, and during operation of the device the metal-ligand complex acts as an electron sink for trapping anions in the electrolyte by displacing a ligand on the metal-ligand complex. ### Claim 11 (depends on 10) The device according to claim 10, where the acicular ceramic particles comprise a ceramic material selected from the group consisting of calcium silicate, alumina fibers, magnesium aluminosilicate glass fibers, titania fibers, and combinations thereof. ### Claim 12 (depends on 10) The device according to claim 10, wherein the separator layer consists essentially of calcium silicate and the binder. ### Claim 13 (depends on 10) The device according to claim 10, wherein the separator layer is impregnated by a liquid electrolyte. ### Claim 14 (depends on 10) The device according to claim 10, wherein the device is selected from the group consisting of an EDLC, hybrid capacitor, fuel cell and battery.