# US 10,504,661 B2 · Hybrid capacitor and separator for hybrid capacitors > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,504,661 B2 - Document ID: US10504661B2 - Status: Granted - Kind: B2 - Application number: 15/558,945 - Filed: 2016-04-01 - Published: 2018-03-15 - Granted: 2019-12-10 - Earliest claimed: 2015-04-03 - Assignees: Nippon Chemi-Con Corporation - Applicants: Nippon Chemi-Con Corporation - Inventors: Kazunori Takaki; Satoru Tsumeda; Shuichi Ishimoto - Web page: https://patentgrep.com/patent/US10504661B2 ## CPC - H01G 11/06: with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC] - H01G 11/08: Structural combinations, e.g. assembly or connection, of hybrid or EDL capacitors with other electric components, at least one hybrid or EDL capacitor being the main component - H01G 11/26: characterised by their structure, e.g. multi-layered, porosity or surface features - H01G 11/50: specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation - H01G 11/52: Separators - H01G 11/54: Electrolytes - H01G 11/32: Carbon-based - Y02E 60/13: Energy storage using capacitors - 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) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Provided is a hybrid capacitor with an excellent long-term stability. A hybrid capacitor includes a positive electrode 1 including a positive-electrode active material layer 1a containing a carbon material employing a porous structure or a fibrous structure with an electric double layer capacity, and a negative electrode 2 including a negative-electrode active material 2a containing a material capable of adsorbing and releasing lithium ions. A lithium compound that traps protons is disposed between the positive-electrode active material layer 1a and the negative-electrode active material layer 2a. This hybrid capacitor further includes a separator 3 disposed between the positive-electrode active material layer 1a and the negative-electrode active material layer 2a, and the separator contains the lithium compound. ## Claims ### Claim 1 A hybrid capacitor comprising: a positive electrode comprising a positive-electrode active material layer containing a carbon material employing a porous structure or a fibrous structure with an electric double layer capacity; and a negative electrode comprising a negative-electrode active material containing a material capable of adsorbing and releasing lithium ions, wherein a lithium compound that traps protons is disposed between the positive-electrode active material layer and the negative-electrode active material layer, and the lithium compound has a capacity of equal to or smaller than 10 mAh/g. ### Claim 2 (depends on 1) The hybrid capacitor according to claim 1, further comprising a separator disposed between the positive-electrode active material layer and the negative-electrode active material layer, wherein the separator contains the lithium compound. ### Claim 3 (depends on 1) The hybrid capacitor according to claim 1, wherein the lithium compound is disposed in a vicinity of the positive-electrode active material layer. ### Claim 4 (depends on 1) The hybrid capacitor according to claim 1, wherein the lithium compound is Li2TiO3. ### Claim 5 (depends on 4) The hybrid capacitor according to claim 4, wherein a specific surface area of the Li2TiO3 is equal to or smaller than 100 m2/g. ### Claim 6 (depends on 1) The hybrid capacitor according to claim 1, wherein a weight ratio per a unit area of the lithium compound relative to the carbon material employing the porous structure or the fibrous structure with the electric double layer capacity is 1:0.1 to 1:1. ### Claim 7 (depends on 1) The hybrid capacitor according claim 1, further comprising an electrolytic solution containing lithium salt as electrolyte at a molar concentration of equal to or greater than 1.8 M. ### Claim 8 A hybrid capacitor separator comprising a lithium compound that traps protons, wherein the lithium compound is Li2TiO3, and a specific surfaces area of the Li2TiO3 is equal to or smaller than 100 m2/g. ### Claim 9 (depends on 8) The hybrid capacitor separator according to claim 8, wherein a lithium compound layer containing the lithium compound is formed on a surface or both surfaces of the separator. ### Claim 10 (depends on 9) The hybrid capacitor separator according to claim 9, wherein the lithium compound layer is formed on the surface facing a positive electrode of the hybrid capacitor. ### Claim 11 (depends on 8) The hybrid capacitor separator according to claim 8, wherein the lithium compound has a capacity of equal to or smaller than 10 mAh/g. ### Claim 12 A hybrid capacitor comprising: a positive electrode comprising a positive-electrode active material layer containing a carbon material employing a porous structure or a fibrous structure with an electric double layer capacity; a negative electrode comprising a negative-electrode active material containing a material capable of adsorbing and releasing lithium ions; and a separator disposed between the positive-electrode active material layer and the negative-electrode active material layer, wherein a lithium compound that traps protons is disposed between the positive-electrode active material layer and the negative-electrode active material layer, the separator contains the lithium compound, the lithium compound is Li2TiO3, and a specific surface area of the Li2TiO3 is equal to or smaller than 100 m2/g. ### Claim 13 (depends on 12) The hybrid capacitor according to claim 12, wherein a weight ratio per a unit area of the lithium compound relative to the carbon material employing the porous structure or the fibrous structure with the electric double layer capacity is 1:0.1 to 1:1. ### Claim 14 (depends on 12) The hybrid capacitor according to claim 12, further comprising an electrolytic solution containing lithium salt as electrolyte at a molar concentration of equal to or greater than 1.8 M.