WO2006068173A1 - 電気二重層キャパシタの電極用炭素材の原料炭組成物 - Google Patents
電気二重層キャパシタの電極用炭素材の原料炭組成物 Download PDFInfo
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- WO2006068173A1 WO2006068173A1 PCT/JP2005/023479 JP2005023479W WO2006068173A1 WO 2006068173 A1 WO2006068173 A1 WO 2006068173A1 JP 2005023479 W JP2005023479 W JP 2005023479W WO 2006068173 A1 WO2006068173 A1 WO 2006068173A1
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- Prior art keywords
- electrode
- carbon
- double layer
- layer capacitor
- electric double
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 66
- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 41
- 239000002994 raw material Substances 0.000 title claims abstract description 33
- 239000003245 coal Substances 0.000 title claims abstract description 32
- 239000003990 capacitor Substances 0.000 title claims abstract description 20
- 230000004913 activation Effects 0.000 claims abstract description 25
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001257 hydrogen Substances 0.000 claims abstract description 14
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 14
- 230000005484 gravity Effects 0.000 claims abstract description 12
- 239000011261 inert gas Substances 0.000 claims abstract description 11
- 239000012298 atmosphere Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 35
- 229910052799 carbon Inorganic materials 0.000 claims description 26
- 239000003921 oil Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000004939 coking Methods 0.000 claims description 9
- 150000001339 alkali metal compounds Chemical class 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 230000003213 activating effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 28
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 15
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- 238000006243 chemical reaction Methods 0.000 description 8
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 239000012190 activator Substances 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 239000011593 sulfur Substances 0.000 description 6
- 238000005292 vacuum distillation Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 5
- 239000003513 alkali Substances 0.000 description 5
- 238000004231 fluid catalytic cracking Methods 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 239000011318 synthetic pitch Substances 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 101001012040 Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1) Immunomodulating metalloprotease Proteins 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 239000006258 conductive agent Substances 0.000 description 4
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- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
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- 238000010298 pulverizing process Methods 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
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- 229910052760 oxygen Inorganic materials 0.000 description 3
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- 150000003839 salts Chemical class 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
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- 239000000567 combustion gas Substances 0.000 description 2
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- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 2
- 239000013081 microcrystal Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 238000004448 titration Methods 0.000 description 2
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 1
- MFGOFGRYDNHJTA-UHFFFAOYSA-N 2-amino-1-(2-fluorophenyl)ethanol Chemical compound NCC(O)C1=CC=CC=C1F MFGOFGRYDNHJTA-UHFFFAOYSA-N 0.000 description 1
- CMJLMPKFQPJDKP-UHFFFAOYSA-N 3-methylthiolane 1,1-dioxide Chemical compound CC1CCS(=O)(=O)C1 CMJLMPKFQPJDKP-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- 229910015900 BF3 Inorganic materials 0.000 description 1
- 241000652704 Balta Species 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- HUCVOHYBFXVBRW-UHFFFAOYSA-M caesium hydroxide Inorganic materials [OH-].[Cs+] HUCVOHYBFXVBRW-UHFFFAOYSA-M 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
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- 230000006837 decompression Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
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- 238000005087 graphitization Methods 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 229910001410 inorganic ion Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 239000011302 mesophase pitch Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene-acid Natural products C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 150000004714 phosphonium salts Chemical group 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
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- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- CPRMKOQKXYSDML-UHFFFAOYSA-M rubidium hydroxide Inorganic materials [OH-].[Rb+] CPRMKOQKXYSDML-UHFFFAOYSA-M 0.000 description 1
- 229910001925 ruthenium oxide Inorganic materials 0.000 description 1
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical class O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 239000003115 supporting electrolyte Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/342—Preparation characterised by non-gaseous activating agents
- C01B32/348—Metallic compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/34—Carbon-based characterised by carbonisation or activation of carbon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/44—Raw materials therefor, e.g. resins or coal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Definitions
- the present invention relates to a raw material carbon composition of an electrode carbon material for an electric double layer capacitor (hereinafter referred to as EDLC), an electrode carbon material obtained from the composition, and an electric power using the carbon material as an electrode material
- EDLC electric double layer capacitor
- Patent Document 1 Japanese Patent Laid-Open No. 2002-25867
- easily graphitized charcoal with developed multi-layer graphite microcrystals is carbonized at 700 to 850 ° C to obtain calcined charcoal.
- a method for producing non-porous carbon having a microcrystalline carbon interlayer distance d of 0.360 to 0.380 is disclosed (Claim 8),
- Patent Document 3 Japanese Patent Laid-Open No. 2004-182504
- X A method has been proposed in which a pitch whose crystallite thickness Lc (002) in the c-axis direction measured by line diffraction is 5.
- a raw material pitch having such characteristics is obtained by using a condensed polycyclic hydrocarbon having at least one alkyl substituent, which is preferable for a synthetic pitch, as a raw material in the presence of hydrogen fluoride and boron trifluoride at 100 to 400 °. It has been proposed to add 5% by mass or more of the synthetic pitch to an inexpensive pitch obtained by polymerization with C and having no alkyl substituent such as naphthalene pitch or anthracene pitch.
- Patent Document 5 Japanese Patent Application Laid-Open No. 2003-51430 discloses a method in which raw coal containing microcrystalline carbon having a layered crystal structure similar to graphite is heated to 600 to 900 ° C and then activated. The interlaminar distance d determined by X-ray diffraction as the coking coal to be used
- the crystallite size of microcrystalline carbon that is 3 nm or less and is determined by X-ray diffraction Lc
- Patent Document 1 JP 2002-25867 (Claim 8)
- Patent Document 2 JP 2001-52972
- Patent Document 3 JP 2002-93667 A
- Patent Document 4 JP 2004-182504 A
- Patent Document 5 Japanese Patent Laid-Open No. 2003-51430
- An object of the present invention is to provide a raw material carbon composition that is a carbon material for an electrode of an electric double layer capacitor that can express a high capacitance without producing a synthetic pitch with good reproducibility.
- the present invention is a raw material charcoal composition that becomes an charcoal material for an electrode of an electric double layer capacitor by being subjected to an activation treatment, and the raw material charcoal composition is 1000 to 1000 in an inert gas atmosphere.
- the true specific gravity (RD) and total hydrogen content (TH%) of the carbide obtained after heating when carbonized at a temperature of 1500 ° C are expressed by the following equation (1)
- the intercept of the formula (1) in claim 1 is obtained by coking by blending plural kinds of starting raw material oils by adjusting the combination and Z or blend ratio thereof.
- the present invention relates to a method for producing a raw material carbon composition which is a carbon material for an electrode of an electric double layer capacitor, characterized by obtaining a raw material carbon composition satisfying 160 or more.
- the crystallinity of the RDZTH force is measured by measuring the whole of the coal coal raw material, and by appropriately adjusting this, high electrostatic capacity is reproducible.
- a well-developed carbon material for EDLC electrodes can be stably obtained without producing synthetic pitch, and 30FZcc It is possible to provide an EDLC having high capacitance as described above.
- FIG. 1 is a graph showing the relationship between RD and TH.
- FIG. 1 is a graph showing the relationship between RD and TH when three types of raw coal compositions (A, B, C) are fired at 1000 to 1500 ° C. in an inert gas atmosphere. As shown in the figure, it can be seen that in any case, the vehicle rides on a straight line having a slope of ⁇ 0.75. It was confirmed that, except for the coking coal composition shown here, the forces examined for RD and TH by the same method both lie on a straight line with a slope of approximately -0.75.
- a heavy hydrocarbon having an appropriate aromatic attribute and containing impurities such as sulfur and metal as much as possible is used under appropriate conditions. Can be obtained by caulking.
- the "heavy hydrocarbon having an appropriate aromatic attribute” means, for example, bottom oil of a fluid catalytic cracker of petroleum heavy oil, residual oil (VR) of a vacuum distillation unit, aromatic compound Something like that.
- a raw coal composition having a large intercept in the formula (1) can be obtained by optimizing the type of starting crude oil and the blend ratio thereof.
- the bottom oil of a fluid heavy oil fluid catalytic cracking unit is mixed with the residual oil of a vacuum distillation unit to obtain a heavy oil mixture with a relatively small amount of sulfur and wasphalene, and this heavy oil mixture is autoclaved.
- the coking coal composition defined in the present invention can be obtained by coking for several hours at a temperature of about 400 to 600 ° C. under pressure (for example, lMPa).
- Such heavy hydrocarbons have graphitic properties, and in the coking process, condensed polycyclic aromatics produced by a thermal decomposition reaction are laminated to form graphite-like microcrystals. Coking coal containing carbon. For this reason, as described above, the raw coal obtained from such a heavy hydrocarbon power also has a high graphitization property. In particular, in the present invention, it is preferable that this raw carbon composition contains microcrystalline carbon similar to graphite.
- the inert gas which is an atmospheric gas when carbonized at 1000 to 1500 ° C, is not particularly limited, and an inert gas usually used in this field such as nitrogen or argon is used. In order to remove oxygen as much as possible, it is desirable to replace the atmospheric gas with an inert gas after decompression.
- the measurement of RD and TH may be performed by another known method as long as an evaluation equivalent to the force measured by the following method is possible.
- the carbonized sample is completely burned in an oxygen stream at 750 ° C, and the amount of water produced from the combustion gas is determined by the coulometric titration method (Karl-Fischer method).
- Karl Fischer method an electrolyte containing iodide ions, sulfur dioxide, base (RN) and alcohol as main components is placed in the titration cell in advance, and the sample is placed in the titration cell.
- the water inside reacts according to the formula (2).
- the iodine necessary for this reaction is an electrochemical reaction (two-electron reaction) of iodide ions. (Equation (3) below)
- the constant 96478 is the Faraday constant
- 18.0153 is the molecular weight of water.
- the amount of water can be determined.
- the total amount of hydrogen (TH (mass%) is calculated by converting the obtained water amount into a hydrogen amount and dividing this by the sample mass used for the measurement.
- the carbon material for the EDLC electrode can be obtained by activating the raw material carbon composition having the above characteristics.
- a conventionally known method can be applied, and examples thereof include an activation reaction with a drug and an activation reaction with a gas.
- An activation reaction using a drug is more preferable, and an activation reaction using an alkali metal compound is particularly preferable.
- the specific surface area of the obtained carbon material is further improved by allowing the alkali metal to enter and react between the graphite crystal layers.
- alkali metal compound various carbonates and hydroxides can be used. Specifically, sodium carbonate, potassium carbonate, potassium hydroxide, sodium hydroxide, lithium hydroxide, hydroxide Examples include rubidium and cesium hydroxide. Of these, alkali metal hydroxides such as potassium hydroxide and sodium hydroxide are preferred, and potassium hydroxide is particularly preferred. Two or more of these alkali metal compounds may be used in combination (for example, combined use of potassium hydroxide and sodium hydroxide).
- the activation method is usually carried out by mixing an activator such as an alkali metal compound and a raw material carbon composition and heating the mixture.
- the mixing ratio of the raw material charcoal composition and the activator such as alkali metal hydroxide is not particularly limited, but usually the mass ratio of the two (raw carbon composition: activator) is 1: 0.
- a range of 5 to 1:10 is preferred.
- a range of 1: 1 to 1: 5 is more preferred.
- the activation reaction may not proceed sufficiently and the required surface area may not be obtained.
- the greater the activator the greater the specific surface area.
- the cost for activation increases and the activation yield decreases, and the bulk density of the resulting carbon material tends to decrease and the capacitance per unit volume tends to decrease.
- the heating temperature in the activation treatment is not particularly limited, but the lower limit is usually 500. C, preferably 600 ° C, and the upper limit is usually 1000 ° C, preferably 900 ° C, particularly preferably 800. C.
- the raw material carbon composition of the present invention usually becomes a carbon material for an EDLC electrode through an alkali cleaning, an acid cleaning, a water cleaning, a drying and a pulverization process.
- an alkali metal compound used as an activator, the amount of alkali metal remaining in the carbon material is lower than the level that may adversely affect EDLC (preferably 10 OOppm or less) If it is, it will be although it does not specifically limit, For example, it is desirable to wash
- the pulverization step is carried out by a known method, and it is usually desirable to obtain a fine powder having an average particle size of 0.5 to 50 ⁇ m, preferably about 1 to 20 ⁇ m.
- the EDLC of the present invention is characterized by comprising an electrode containing the electrode carbon material prepared as described above.
- the electrode may be, for example, an electrode carbon material and a binder, more preferably a conductive agent, and may be an electrode integrated with a current collector.
- binder used here known ones can be used, and examples thereof include polyolefins such as polyethylene and polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, and fluorolef. Examples thereof include fluorinated polymers such as in-Z butyl ether copolymer cross-linked polymers, celluloses such as carboxymethyl cellulose, bur polymers such as polybulurpyrrolidone and polyvinyl alcohol, and polyacrylic acid.
- the content of the binder in the electrode is not particularly limited, but is appropriately selected within a range of usually about 0.1 to 30% by mass with respect to the total amount of the electrode carbon material and the binder.
- the conductive agent powders of carbon black, powder graphite, titanium oxide, ruthenium oxide and the like are used.
- the blending amount of the conductive agent in the electrode is appropriately selected depending on the blending purpose, but is usually 1 to 50% by mass, preferably 2 with respect to the total amount of the carbon material for the electrode, the binder and the conductive agent. It is suitably selected within a range of about 30% by mass.
- a known method is appropriately applied.
- a solvent having a property of dissolving the binder is added to the above components.
- a method in which a slurry is uniformly coated on the current collector, or a method in which the above components are kneaded without adding a solvent and then pressure-molded at room temperature or under heating is employed.
- the current collector a known material and shape can be used.
- a metal such as aluminum, titanium, tantalum, or nickel, or an alloy such as stainless steel can be used. I'll do it.
- the unit cell of the EDLC of the present invention generally uses a pair of the above electrodes as a positive electrode and a negative electrode, faces each other through a separator (polypropylene fiber nonwoven fabric, glass fiber nonwoven fabric, synthetic cellulose paper, etc.), and is immersed in an electrolytic solution. Formed by.
- a separator polypropylene fiber nonwoven fabric, glass fiber nonwoven fabric, synthetic cellulose paper, etc.
- the electrolytic solution it is more preferable to use a force-organic electrolytic solution in which a known aqueous electrolytic solution or organic electrolytic solution can be used.
- a known aqueous electrolytic solution or organic electrolytic solution can be used.
- organic electrolytic solution those used as a solvent for an electrochemical electrolytic solution can be used.
- the supporting electrolyte in the organic electrolytic solution is not particularly limited, and various types of salts, acids, alkalis, and the like that are usually used in the electrochemical field or the battery field can be used.
- Inorganic ion salts such as alkali metal salts and alkaline earth metal salts, quaternary ammonium salts, cyclic quaternary ammonium salts, quaternary phosphonium salts, and the like (C)) NBF
- (CH) (CH) NBF, (CH) PBF, (CH) (CH) PBF, etc. are preferred As mentioned.
- the concentration of these salts in the electrolytic solution is appropriately selected within the range of usually about 0.1 to 5 molZl, preferably about 0.5 to 3 molZl.
- a more specific configuration of the EDLC is not particularly limited, for example, a metal case with a separator interposed between a pair of thin sheet-like or disk-like electrodes (positive electrode and negative electrode) having a thickness of 10 to 500 ⁇ m A coin type housed in a container, a wound type formed by winding a pair of electrodes through a separator, and a stacked type in which a large number of electrode groups are stacked through a separator.
- the total hydrogen content (TH) and true specific gravity (RD) of the sample were measured by the following methods.
- Total hydrogen content Samples pulverized to 74 ⁇ m or less (200 mesh or more) were completely burned in a mobile furnace in an oxygen stream at 750 ° C, and the combustion gas was fixed with copper monoxide, copper desulfurization agent, and copper filled. After passing through the furnace at 750 ° C and desulfurizing / denitrating, the amount of water produced was determined by a coulometric titration method (Karl-Fischer method) using a coulometric titrator to calculate the total hydrogen content.
- True specific gravity measured by a water displacement method using a pycnometer. Specifically, the sample is pulverized to 74 / zm or less (200 mesh or more), 9 ⁇ : L lg of the crushed sample is collected in a pycnometer, immersed in distilled water, boiled and degassed, and then the true volume of the sample The true specific gravity was calculated by dividing the collected sample weight by the true volume. The calculation formula is as follows.
- ml is the mass when the sample is put into the pycnometer (g)
- m2 is the mass of the pycnometer (g)
- m3 is when the pycnometer containing the sample is filled with distilled water (30 ° C)
- Mass (g) and m4 are masses when an empty pycnometer is filled with distilled water (30 ° C).
- the constant 0.9956 7 is the density of water at 30 ° C (g / cm 3 ).
- the specific surface area of the obtained carbon material was measured by the BET method.
- the obtained raw coal composition was calcined at 1000-1500 ° C. in an inert gas atmosphere to determine the total hydrogen content and true specific gravity. The results are shown in Table 1.
- Two disk-shaped discs with a diameter of 16 mm are punched from the above electrode sheet, vacuum-dried at 120 ° C and 13.3 Pa (0. lTorr) for 2 hours, and then placed in a glove botton under a nitrogen atmosphere with a dew point of 85 ° C Then, an organic electrolyte (propylene carbonate solution of triethylmethyl ammonium tetrafluoroborate, concentration: 1 mol Z liter) was vacuum impregnated.
- the two electrodes are the positive and negative electrodes, respectively, and a glass fiber separator (ADVANTEC, trade name: GA-200, thickness: 200 m) is attached between the two electrodes, and aluminum foil current collectors are attached to both ends.
- An electric double layer capacitor (coin-type cell) was fabricated by incorporating it into a two-pole cell manufactured by Hosen.
- the bottom oil of the fluid catalytic cracking unit of petroleum heavy oil was mixed with the residual oil of the vacuum distillation unit to obtain a heavy oil mixture having a sulfur content of 0.26 mass% and a asphaltene content of 1.5 mass%.
- This heavy oil mixture was caulked in an autoclave under IMPa at 550 ° C. for 2 hours to obtain a raw material composition.
- the obtained raw coal composition was calcined at 1000-1500 ° C. in an inert gas atmosphere to determine the total hydrogen content and true specific gravity. The results are shown in Table 1.
- the bottom oil of the fluid catalytic cracking unit of petroleum heavy oil was mixed with the residual oil of the vacuum distillation unit to obtain a heavy oil mixture having a sulfur content of 0.19 mass% and a wasarte amount of 9. Omass%.
- This heavy oil mixture was caulked in an autoclave under IMPa at 550 ° C. for 2 hours to obtain a raw material composition.
- the obtained raw coal composition was calcined at 1000-1500 ° C. in an inert gas atmosphere to determine the total hydrogen content and true specific gravity. The results are shown in Table 1.
- the obtained raw coal composition was fired at 1000-1500 ° C in an inert gas atmosphere, The hydrogen content and true specific gravity were determined. The results are shown in Table 1.
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- Power Engineering (AREA)
- Materials Engineering (AREA)
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- Inorganic Chemistry (AREA)
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Abstract
Description
Claims
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EP05820126.0A EP1830373B1 (en) | 2004-12-22 | 2005-12-21 | Raw material coal composition for carbon material for electrode in electric double layer capacitor |
US11/722,397 US7582902B2 (en) | 2004-12-22 | 2005-12-21 | Raw material carbon composition for carbon material for electrode in electric double layer capacitor |
CN2005800442222A CN101124646B (zh) | 2004-12-22 | 2005-12-21 | 用于双电层电容器中的电极的碳材料用的原料碳组合物 |
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JP2004371611A JP2006179697A (ja) | 2004-12-22 | 2004-12-22 | 電気二重層キャパシタの電極用炭素材の原料炭組成物 |
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KR20070087047A (ko) | 2007-08-27 |
EP1830373B1 (en) | 2014-04-02 |
CN101124646B (zh) | 2010-05-12 |
JP2006179697A (ja) | 2006-07-06 |
CN101124646A (zh) | 2008-02-13 |
US20080144255A1 (en) | 2008-06-19 |
EP1830373A4 (en) | 2011-01-26 |
US7582902B2 (en) | 2009-09-01 |
EP1830373A1 (en) | 2007-09-05 |
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