# US 6,671,166 B1 · Double layer high power capacitor comprising a liquid organic electrolyte > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 6,671,166 B1 - Document ID: US6671166B1 - Status: Granted - Kind: B1 - Application number: 09/367,197 - Filed: 2000-01-18 - Granted: 2003-12-30 - Earliest claimed: 1997-02-06 - Assignees: Bollore - Inventors: Jean-François Penneau; François Capitaine; Guillaume Herlem - Web page: https://patentgrep.com/patent/US6671166B1 ## CPC - H01G 11/58: Liquid electrolytes - H01G 11/62: characterised by the solute, e.g. salts, anions or cations therein - 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 The invention concerns a high power capacitor ideally polarizable consisting of a positive electrode (2) and its current collector (4), a negative electrode (3) and its current collector (5), said electrodes comprising a carbon containing material with high specific surface area, a separator (6) and a non-aqueous liquid electrolyte impregnating said separator and said electrodes. The invention is characterised in that the non-aqueous liquid electrolyte is an organic solution of a sodium or potassium or alkalin-earth metal salt, on their own or mixed in a solvent containing an acid. ## Claims ### Claim 1 Ideally polarizable supercapacitor consisting of a positive electrode and its current collector, of a negative electrode and its current collector, said electrodes comprising a carbon material, of a separator and of a nonaqueous liquid electrolyte impregnating said separator and said electrodes, characterized in that the nonaqueous liquid electrolyte is an organic solution of a sodium or potassium salt or an alkaline-earth metal salt, by itself or as a mixture in a solvent comprising one or more amides; and the solution is based on an aprotic polar solvent comprising an amide of formula: in which: R1 is a hydrogen atom or a C1 to C3 alkyl radical, R2, R3, which are identical or different, are the hydrogen atom or a methyl, ethyl or propyl radical. ### Claim 2 (depends on 1) Supercapacitor according to claim 1, characterized in that the carbon material has a specific surface area of between 300 and 3000 m2/g. ### Claim 3 (depends on 2) Supercapacitor according to claim 2, characterized in that the carbon material has a specific surface area greater than 1000 m2/g. ### Claim 4 (depends on 1) Supercapacitor according to claim 1, characterized in that each electrode is formed from a film of polymeric material, having a specific surface area greater than 10 m2/g, filled with a carbon material. ### Claim 5 (depends on 4) Supercapacitor according to claim 4, characterized in that the polymeric material comprises polymers chosen from the group consisting of polyolefins. ### Claim 6 (depends on 1) Supercapacitor according to claim 1, characterized in that each electrode is formed from an active carbon cloth having a specific surface area greater than 1000 m2/g. ### Claim 7 (depends on 1) Supercapacitor according to claim 1, characterized in that the organic solution comprises, in a minor amount, one or more solvents chosen from the group consisting of esters, nitrites and carbonates. ### Claim 8 (depends on 7) Supercapacitor according to claim 7, characterized in that the minor solvents are chosen from the group consisting of propylene carbonate, γ-butyrolactone and acetonitrile, by themselves or as a mixture. ### Claim 9 (depends on 1) Supercapacitor according to claim 1, characterized in that the solvent is in the form of a mixture with a cosolvent capable of lowering the viscosity of the solution. ### Claim 10 (depends on 9) Supercapacitor according to claim 9, characterized in that the cosolvent is chosen from, methyl formate, ethyl formate, dimethyl carbonate, diethyl carbonate, methyl acetate, ethyl acetate, dimethoxymethane, dimethoxyethane, diethoxymethane, diethoxyethane, dioxolane, tetrahydrofuran and acetonitrile. ### Claim 11 (depends on 1) Supercapacitor according to claim 1, characterized in that the salt is present in a concentration of 0.3 to 3 mol per liter. ### Claim 12 (depends on 1, 11) Supercapacitor according to claim 1 or 11, characterized in that the salt is chosen from the group consisting of NaCl, NaBr, NaBF4, NaPF6, NaClO4, and NaRSO3, R being a lower perfluoroalkyl radical (having from 1 to 6 carbon atoms, especially CF3), NaAsF6, NaSCN, KF, KCl, KBr, KBF4, KPF6, KNO3, KClO4, KRSO3, R being a lower perfluoroalkyl radical (having 1 to 6 carbon atoms, especially CF3), KAsF6 or KSCN. ### Claim 13 (depends on 1, 11) Supercapacitor according to claim 1 or 11, characterized in that the salt is chosen from the group consisting of MgCl2, MgSO4 Mg (ClO4)2, CaCl2, Ca (NO3)2, CaSO4 or Ca (ClO4)2. ### Claim 14 (depends on 1) Supercapacitor according to claim 1, characterized in that each electrode is formed from a film of polymeric material, having a specific surface area greater than 20 m2/g, filled with a carbon material. ### Claim 15 (depends on 1) Supercapacitor according to claim 1, characterized in that the amide is chosen from the group consisting of dimethylformamide, formamide, N-methylformamide, N-methylpropionamide and N,N-dimethylacetamide, by themselves or as a mixture. ### Claim 16 Ideally polarizable supercapacitor consisting of a positive electrode and its current collector, of a negative electrode and its current collector, said electrodes comprising a carbon material, of a separator and of a nonaqueous liquid electrolyte impregnating said separator and said electrodes, characterized in that the nonaqueous liquid electrolyte is an organic solution of a sodium or potassium or magnesium or calcium salt, by itself or as a mixture in a solvent comprising one or more amides; and the solution is based on an aprotic polar solvent comprising an amide of formula: in which: R1 is a hydrogen atom or a C1 to C3 alkyl radical, R2, R3, which are identical or different, are the hydrogen atom or a methyl, ethyl or propyl radical.