WO2012017676A1 - リチウム二次電池用黒鉛系負極活物質 - Google Patents
リチウム二次電池用黒鉛系負極活物質 Download PDFInfo
- Publication number
- WO2012017676A1 WO2012017676A1 PCT/JP2011/004453 JP2011004453W WO2012017676A1 WO 2012017676 A1 WO2012017676 A1 WO 2012017676A1 JP 2011004453 W JP2011004453 W JP 2011004453W WO 2012017676 A1 WO2012017676 A1 WO 2012017676A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- negative electrode
- lithium secondary
- secondary battery
- active material
- graphite
- Prior art date
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 83
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 63
- 239000010439 graphite Substances 0.000 title claims abstract description 63
- 239000010405 anode material Substances 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 30
- 239000000571 coke Substances 0.000 claims abstract description 14
- 238000000634 powder X-ray diffraction Methods 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 238000004939 coking Methods 0.000 claims abstract description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000008186 active pharmaceutical agent Substances 0.000 claims abstract description 5
- 239000010779 crude oil Substances 0.000 claims abstract description 5
- 230000005484 gravity Effects 0.000 claims abstract description 5
- 238000005292 vacuum distillation Methods 0.000 claims abstract description 3
- 239000007773 negative electrode material Substances 0.000 claims description 68
- 239000000203 mixture Substances 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 11
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 239000002134 carbon nanofiber Substances 0.000 claims description 8
- 238000004381 surface treatment Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000002441 X-ray diffraction Methods 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- 238000010248 power generation Methods 0.000 claims description 6
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 claims description 4
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 4
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 4
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 4
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 abstract 1
- 239000006183 anode active material Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 15
- 239000003575 carbonaceous material Substances 0.000 description 11
- 238000000465 moulding Methods 0.000 description 8
- 239000011295 pitch Substances 0.000 description 8
- 239000007774 positive electrode material Substances 0.000 description 7
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 6
- -1 polyethylene Polymers 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 150000002894 organic compounds Chemical class 0.000 description 4
- 239000005518 polymer electrolyte Substances 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000003125 aqueous solvent Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 229910003002 lithium salt Inorganic materials 0.000 description 3
- 159000000002 lithium salts Chemical class 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- 239000011244 liquid electrolyte Substances 0.000 description 2
- 238000010303 mechanochemical reaction Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 229920002101 Chitin Polymers 0.000 description 1
- 229920001661 Chitosan Polymers 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910013684 LiClO 4 Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 229910012424 LiSO 3 Inorganic materials 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 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
- 239000003245 coal Substances 0.000 description 1
- 239000011300 coal pitch Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000011245 gel electrolyte Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920002113 octoxynol Polymers 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- AHHWIHXENZJRFG-UHFFFAOYSA-N oxetane Chemical group C1COC1 AHHWIHXENZJRFG-UHFFFAOYSA-N 0.000 description 1
- 239000011301 petroleum pitch Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002755 poly(epichlorohydrin) Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- 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
- H01G11/24—Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
-
- 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
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
-
- 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
- H01G11/38—Carbon pastes or blends; Binders or additives therein
-
- 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
-
- 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
- H01G11/50—Electrodes characterised by their material specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0569—Liquid materials characterised by the solvents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
-
- 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
- H01G11/36—Nanostructures, e.g. nanofibres, nanotubes or fullerenes
-
- 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
- H01G11/42—Powders or particles, e.g. composition thereof
-
- 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
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/60—Liquid electrolytes characterised by the solvent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
- H01M2300/0028—Organic electrolyte characterised by the solvent
-
- 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
- Y02E60/10—Energy storage using batteries
-
- 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 graphite-based negative electrode active material for a lithium secondary battery, a negative electrode for a lithium secondary battery, and a lithium secondary battery. More specifically, the present invention relates to a graphite-based negative electrode active material for a lithium secondary battery having good charge / discharge cycle characteristics even when packed at a high density in order to obtain a high battery capacity, and this graphite-based negative electrode for a lithium secondary battery.
- the present invention relates to a lithium secondary battery negative electrode containing an active material, and a lithium secondary battery including the lithium secondary battery negative electrode.
- the lithium secondary battery according to the present invention implies a lithium ion capacitor.
- Lithium secondary batteries are mainly used as power sources for portable devices. Mobile devices and the like have diversified functions and have increased power consumption. Therefore, the lithium secondary battery is required to increase its battery capacity and simultaneously improve the charge / discharge cycle characteristics.
- a lithium salt such as lithium cobaltate is generally used for the positive electrode active material, and graphite or the like is used for the negative electrode active material.
- a method of increasing the electrode packing density of the carbonaceous material used for the negative electrode can be considered.
- the electrode packing density is increased using a conventional carbonaceous material, the carbonaceous material may be deformed and the cycle characteristics may be significantly deteriorated.
- Patent Literature 1 and Patent Literature 2 describe composite graphite having a specific crystal structure.
- Patent Document 3 describes that graphite having a specific crystal structure and vapor grown carbon fiber having a specific crystal structure are used in combination.
- Patent Document 4 describes a composite carbon material obtained by attaching an organic compound as a polymer raw material to carbonaceous particles such as graphite, polymerizing the organic compound, and then heat-treating at 1800 to 3300 ° C. ing.
- an object of the present invention is to provide a graphite-based negative electrode active material for a lithium secondary battery having a high capacity and good charge / discharge cycle characteristics even when filled at high density, and for a lithium secondary battery containing this negative electrode active material.
- An object is to provide a negative electrode and a lithium secondary battery including the negative electrode.
- the present inventors diligently studied to achieve the above object.
- a novel graphite-based negative electrode active material for lithium secondary batteries in which the interplanar spacing, crystallite size, and half-value width of the diffraction peak measured by the X-ray diffraction method are in a specific numerical range was found.
- this negative electrode active material was contained in the negative electrode of a lithium secondary battery, it discovered that a lithium secondary battery with a sufficient capacity
- the present invention has been further studied and completed based on these findings.
- the present invention includes the following.
- d 002 is 0.3354 nm or more and 0.337 nm or less
- Lc (004) is less than 100 nm
- the volume average particle diameter D 50 of the pitch is 1 [mu] m ⁇ 10 [mu] m, the graphite-based negative active material according to [7].
- Coke is obtained by coking crude oil vacuum distillation residue containing an API specific gravity of 1 to 5 degrees, an asphaltene content of 10 to 50%, a resin content of 5 to 30%, and a sulfur content of 1 to 12%, and the coke is pulverized.
- the carbon powder is obtained, and the carbon powder is heat-treated at 1000 to 3500 ° C.
- the production of the graphite-based negative electrode active material for a lithium secondary battery according to any one of the above [1] to [9] Method.
- the production method according to [10] further including surface treatment by a mechanofusion method or a wet method.
- the production method according to [10] or [11] wherein the water content of the coke is 1.0% or less.
- a negative electrode for a lithium secondary battery comprising the graphite-based negative electrode active material for a lithium secondary battery according to any one of [1] to [9].
- a lithium secondary battery comprising the lithium secondary battery negative electrode according to [13] or [14].
- a transportation facility comprising the lithium secondary battery according to [15] or [16].
- a power generation system including the lithium secondary battery according to [15] or [16].
- An electric / electronic device comprising the lithium secondary battery according to [15] or [16].
- the graphite-based negative electrode active material for a lithium secondary battery of the present invention is contained in the negative electrode of a lithium secondary battery, a lithium secondary battery having a high capacity and good charge / discharge cycle characteristics even when filled at a high density is obtained. can get.
- FIG. 1 is a diagram showing powder X-ray diffraction of a graphite-based negative electrode active material for a lithium battery according to the present invention obtained in Example 1.
- FIG. 1 is a diagram showing powder X-ray diffraction of a graphite-based negative electrode active material for a lithium battery according to the present invention obtained in Example 1.
- the graphite-based negative electrode active material for lithium secondary battery of the present invention has a d 002 of 0.3354 nm or more and 0.337 nm or less, preferably 0. It is 3359 nm or more and 0.3368 nm or less.
- d002 indicates the high crystallinity of graphite.
- the negative electrode active material according to the present invention has an Lc (004) of less than 100 nm, preferably 40 nm or more and 85 nm or less, in powder X-ray diffraction.
- the negative electrode active material according to the present invention has La (110) of 100 nm or more in powder X-ray diffraction.
- Lc (004) is the thickness of the crystallite in the c-axis direction calculated based on the 004 diffraction line of the graphite powder.
- La (110) is the width in the a-axis direction of the crystallites calculated based on the 110 diffraction lines of the graphite powder.
- the peak half-value width B 101 derived from the (101) plane appearing at a diffraction angle (2 ⁇ ): 44 ° to 45 ° in powder X-ray diffraction is preferably 0.65 ° or more. Is from 0.65 ° to 2 °, more preferably from 0.7 ° to 1.5 °. That the half width B 101 of the peak derived from the (101) plane is 0.65 ° or more indicates that the peak is relatively broad. The fact that this peak is broad is considered to indicate disorder of the ABA stacking structure of the graphite crystal. It is known that when lithium ions are inserted between graphite layers, the structure changes from an ABA stacking structure to an AAA stacking structure. When the ABA stacking structure is disturbed, it is assumed that the change of the graphite stacking structure upon insertion of lithium ions may be performed with lower energy.
- the peak intensity ratio I (100) / I (101) in powder X-ray diffraction is preferably 1 or less, more preferably 0.7 or more and 1 or less, and still more preferably 0. 75 or more and 0.95 or less.
- the negative electrode active material according to the present invention has a density of 1.5 g / cm 3 or more by applying a mixture containing the negative electrode active material and a binder onto a copper foil, drying, and then press molding.
- a mixture layer of 1.6 g / cm 3 or less is formed, and the peak intensity ratio I (110) / I (004) when the mixture layer is measured by an X-ray diffraction method is preferably 0.2 or more. More preferably, it is more than 0.35 and 0.9 or less.
- the peak intensity ratio I (110) / I (004) obtained by the measurement method indicates the orientation of the graphite powder. It shows that the larger the value, the lower the orientation.
- the negative electrode active material according to the present invention has a BET specific surface area of preferably 5 m 2 / g or less, more preferably 1 to 4.5 m 2 / g.
- the BET specific surface area is 5 m 2 / g or less, an undesirable side reaction with the electrolytic solution hardly proceeds, and deterioration of charge / discharge cycle characteristics hardly proceeds.
- the negative electrode active material according to the present invention has a volume average particle diameter D 50 of preferably 3 ⁇ m or more and 30 ⁇ m or less, more preferably 4 ⁇ m or more and 25 ⁇ m or less, and further preferably 4 ⁇ m or more and 20 ⁇ m or less. When the volume average particle diameter D 50 is in this range, the smoothness of the electrode surface becomes good and an undesirable side reaction with the electrolytic solution is difficult to proceed.
- the negative electrode active material according to the present invention can be obtained, for example, by the following method.
- the residue preferably has an API specific gravity of 1 to 5 degrees, an asphaltene content of preferably 10 to 50%, a resin content of preferably 5 to 30%, and a sulfur content of preferably 1 to 12%.
- the residue is coked to obtain coke.
- the coking method may be a delayed coking method or a fluid coking method.
- the obtained coke is cut out with water, heated, and dried until the water content is preferably 1.0% or less.
- the dried coke mass is pulverized and classified to obtain carbon powder.
- the pulverization method is not particularly limited, and examples thereof include a method using an apparatus such as a hammer mill, a pin mill, a jet mill, a rod mill, or an ACM pulverizer.
- the volume average particle diameter D 50 of the carbon powder after classification is preferably 3 ⁇ m or more and 30 ⁇ m or less, more preferably 4 ⁇ m or more and 25 ⁇ m or less, and further preferably 4 ⁇ m or more and 20 ⁇ m or less.
- the carbon powder is preferably heat-treated at 1000 to 3500 ° C., more preferably 2000 to 3400 ° C., and still more preferably 2500 to 3300 ° C. to graphitize. In this way, the negative electrode active material according to the present invention can be obtained.
- the negative electrode active material according to the present invention may have a surface treated.
- the surface treatment include surface fusion by a mechanofusion method and the like, and surface coating by a wet method and the like.
- the wet method for example, there is a method as described in JP-A-2005-158718. Specifically, a method comprising attaching and / or impregnating an organic compound as a polymer raw material to the surface of the negative electrode active material, then polymerizing the organic compound, and then heat-treating at 1800 to 3300 ° C. Alternatively, the resin material solution is attached to and / or impregnated on the surface of the negative electrode active material, dried, and then heat treated at 1800 to 3300 ° C.
- a negative electrode active material and a different carbon material or resin material are put into an apparatus capable of high-speed rotation mixing, and mechanical energy is added to the negative electrode active material and the different carbon material or resin material.
- This is a method including causing a mechanochemical reaction and then heat-treating at 900 ° C. to 2000 ° C. as necessary.
- surface treatment by mechanofusion method is preferred.
- carbon materials such as petroleum pitch, coal pitch and coal tar, and resin materials such as phenol resin and furan resin are used.
- Petroleum pitches or coal pitches are optically isotropic and optically anisotropic.
- an optically isotropic material is used.
- the pitch used in the surface treatment has a softening point of preferably 200 to 350 ° C., fixed carbon of preferably 50 to 80% by mass, and a volume average particle diameter D 50 of preferably 1 ⁇ m to 10 ⁇ m.
- the amount of pitch used for the surface treatment is preferably 0.1 to 50 parts by mass, more preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the negative electrode active material.
- the graphite-based negative electrode active material for a lithium secondary battery of the present invention may be composed of one kind of carbonaceous material or a plurality of different kinds of carbons as long as it has the above characteristic values. It may be made of a quality material.
- Negative electrode for lithium secondary battery contains the negative electrode active material of this invention.
- the negative electrode active material is usually contained in a negative electrode active material layer.
- the negative electrode active material layer is formed by molding a mixture containing the negative electrode active material, a binder, and an additive blended as necessary, by various molding methods.
- the negative electrode active material layer is usually laminated with a current collector for facilitating energization with terminals and conductive wires.
- Binders include polyethylene, polypropylene, ethylene propylene terpolymer, butadiene rubber, styrene butadiene rubber, butyl rubber, polytetrafluoroethylene, poly (meth) acrylate, polyvinylidene fluoride, polyethylene oxide, polypropylene oxide, polyepichlorohydrin, polyphasphazene. , Polyacrylonitrile, and the like.
- Examples of the additive added to the negative electrode active material layer as necessary include a conductivity imparting material, an ion-permeable compound, a thickener, a dispersant, a lubricant, activated carbon, and the like.
- Examples of the conductivity imparting material include conductive metal powders such as silver powder; conductive carbon powders such as furnace black, ketjen black, and acetylene black; carbon nanotubes, carbon nanofibers, and vapor grown carbon fibers.
- the vapor grown carbon fiber preferably has a fiber diameter of 5 nm to 0.2 ⁇ m.
- the content of vapor grown carbon fiber is preferably 0.1 to 10% by mass relative to the mass of the negative electrode active material layer.
- the ion-permeable compound include polysaccharides such as chitin and chitosan, or a cross-linked product of the polysaccharide.
- the thickener include carboxymethyl cellulose and polyvinyl alcohol.
- the negative electrode active material layer is obtained, for example, by applying a paste-like mixture to a current collector, drying, and pressure-molding, or by pressure-molding a powdery mixture on the current collector. It is done.
- the thickness of the negative electrode active material layer is usually 0.04 mm or more and 0.15 mm or less.
- a negative electrode active material layer having an arbitrary electrode density can be obtained by adjusting the pressure applied during molding. The pressure applied during the molding is 1t / cm 2 ⁇ 3t / cm 2 is preferably about.
- the current collector examples include a conductive metal foil, a conductive metal net, and a conductive metal punching metal.
- a conductive metal foil one containing copper, aluminum, nickel or the like is used.
- the negative electrode current collector preferably contains copper.
- the lithium secondary battery of the present invention comprises the negative electrode for a lithium secondary battery of the present invention.
- the lithium secondary battery of the present invention implies a lithium ion capacitor.
- the lithium secondary battery of the present invention further includes a positive electrode.
- As the positive electrode those conventionally used in lithium secondary batteries can be used.
- the positive electrode usually comprises a positive electrode active material layer containing a positive electrode active material and a current collector laminated on the positive electrode active material layer. Examples of the positive electrode active material include LiNiO 2 , LiCoO 2 , and LiMn 2 O 4 .
- the positive electrode active material layer may further contain a conventionally known additive for a positive electrode active material.
- the positive electrode current collector preferably contains aluminum.
- a positive electrode and a negative electrode are usually immersed in an electrolyte.
- the electrolyte may be liquid, gel or solid.
- the liquid electrolyte include a non-aqueous solvent solution of a lithium salt.
- the lithium salt include LiClO 4 , LiPF 6 , LiAsF 6 , LiBF 4 , LiSO 3 CF 3 , CH 3 SO 3 Li, and CF 3 SO 3 Li.
- the non-aqueous solvent used for the liquid electrolyte is preferably at least one selected from the group consisting of ethylene carbonate, diethyl carbonate, dimethyl carbonate, methyl ethyl carbonate, propylene carbonate, butylene carbonate, ⁇ -butyrolactone, and vinylene carbonate.
- the solid electrolyte or the gel electrolyte examples include a polymer electrolyte such as a sulfonated styrene-olefin copolymer, a polymer electrolyte using polyethylene oxide and MgClO 4 , and a polymer electrolyte having a trimethylene oxide structure.
- the non-aqueous solvent used for the polymer electrolyte is preferably at least one selected from the group consisting of ethylene carbonate, diethyl carbonate, dimethyl carbonate, methyl ethyl carbonate, propylene carbonate, butylene carbonate, ⁇ -butyrolactone, and vinylene carbonate.
- a separator is provided between the positive electrode and the negative electrode as necessary.
- the separator include a nonwoven fabric, a woven fabric, a microporous film, and a combination thereof.
- the lithium secondary battery according to the present invention can be used in various fields.
- the physical properties of the graphite-based negative electrode active material for lithium secondary batteries were measured by the following methods.
- Lc (004) is the thickness in the c-axis direction of the crystallite calculated based on the 004 diffraction line.
- La (110) is the width in the a-axis direction of the crystallite calculated based on 110 diffraction lines.
- I (100) / I (101) is the ratio of the peak intensity of 100 diffraction lines to the peak intensity of 101 diffraction lines.
- B 101 is the half width of the peak of the 101 diffraction line appearing at the diffraction angle (2 ⁇ ): 44 ° to 45 °.
- the mixture was applied onto the copper foil using an automatic coating machine and a doctor blade having a clearance of 250 ⁇ m.
- the copper foil coated with the mixture was placed on a hot plate at about 80 ° C. to remove moisture. Then, it was dried at 120 ° C. for 6 hours with a vacuum dryer. After drying, press molding with a press so that the electrode density calculated from the mass of solids in the mixture and the coating film dry volume is 1.5 g / cm 3 or more and 1.6 g / cm 3 or less.
- An electrode sheet obtained by laminating a mixture layer and a copper foil was obtained. The electrode sheet was cut into an appropriate size, attached to a glass cell for X-ray diffraction measurement, and measured by the X-ray diffraction method. And peak intensity ratio I (110) / I (004) was computed.
- the peak intensity ratio I (110) / I (004) indicates the orientation of graphite.
- BET specific surface area S sa The specific surface area was calculated by the BET method using nitrogen adsorption.
- the volume average particle diameter D 50 Two cups of ultra-small spatula and 2 drops of nonionic surfactant (Triton-X) were added to 50 ml of water and ultrasonically dispersed for 3 minutes. The dispersion was placed in a Malvern Co. laser diffraction particle size distribution measuring apparatus (Mastersizer), measuring the particle size distribution was determined volume average particle diameter D 50.
- Example 1 Production of Graphite A1 Venezuelan crude oil was distilled under reduced pressure to obtain a residue.
- the residue had an API specific gravity of 2.3 degrees, an asphaltene content of 25%, a resin content of 15%, and a sulfur content of 6.0%.
- the residue was put into a delayed coker and coked to obtain coke.
- the obtained coke was cut out with water, heated at 120 ° C., and dried until the water content became 1.0% or less.
- the dried coke mass was pulverized with a hammer mill manufactured by Hosokawa Micron Corporation, and air-flow classified with a turbo classifier TC-15N manufactured by Nisshin Engineering Co., Ltd. to obtain a carbon powder having a volume average particle diameter D 50 of 17 ⁇ m.
- FIG. 1 shows powder X-ray diffraction of graphite A1.
- Example 2 Production of Graphite B1 A carbon powder having a volume average particle diameter D 50 of 5 ⁇ m was obtained by airflow classification, and this was used in place of the carbon powder having a volume average particle diameter D 50 of 17 ⁇ m. 1 was used to obtain graphite B1. The physical properties are shown in Table 1.
- Example 3 Production of Graphite A2 5 parts by mass of a petroleum-based optical isotropic pitch having a softening point of about 275 ° C., 65% by mass of fixed carbon and a volume average particle diameter D 50 of 5 ⁇ m, and 95 parts by mass of graphite A1 were mixed. .
- This mixture was put in a mechanofusion system manufactured by Hosokawa Micron and rotated at high speed. Next, this was heat-treated at 1200 ° C. for 1 hour in a nitrogen gas atmosphere. After cooling, graphite A2 was obtained through a sieve having an opening of 45 ⁇ m.
- Mechanofusion is a technology that creates a new material by adding a certain kind of mechanical energy to a plurality of different material particles to cause a mechanochemical reaction. The physical properties are shown in Table 1.
- Example 4 Production of Graphite B2 Graphite B2 was obtained in the same manner as in Example 3 except that graphite B1 was used instead of graphite A1. The physical properties are shown in Table 1.
- Comparative Examples 1 to 4 As comparative examples, spherical natural graphite (hereinafter referred to as graphite C1), mesophase carbon (hereinafter referred to as graphite D) and scaly artificial graphite (hereinafter referred to as graphite E) were prepared. These are commercially available products. Further, graphite C2 was obtained in the same manner as in Example 3 except that graphite C1 was used instead of graphite A1. Their physical properties are shown in Table 1.
- Examples 5 to 8 and Comparative Examples 5 to 8 The graphites prepared in Examples 1 to 4 and Comparative Examples 1 to 4 were used as negative electrode active materials, respectively. Using these negative electrode active materials, lithium secondary batteries were produced by the following method, and the discharge capacity retention rate (%) after 200 charge / discharge cycles was measured. The results are shown in Table 2.
- a spacer, a leaf spring, a negative electrode, a separator (polypropylene microporous film “Celguard 2400” manufactured by Celgard) and a positive electrode were stacked in this order in a cylindrical SUS304 receiving exterior material.
- a cylindrical upper cover material made of SUS304 was placed.
- the receiving exterior material and the upper lid exterior material were caulked to obtain a coin cell for evaluation.
- Five coin cells were manufactured for one kind of negative electrode active material and subjected to an evaluation test.
- the third and subsequent charge / discharge cycles were performed as follows. From the rest potential to 4.2V, constant current charge is performed at 0.34mA / cm 2 (equivalent to 0.2C), and when the voltage reaches 4.2V, constant voltage charge is performed at 4.2V, and the current value reaches 20 ⁇ A. Charging was stopped when the voltage dropped. Subsequently, constant current discharge was performed at 1.7 mA / cm 2 (corresponding to 1.0 C), and cut off at a voltage of 2.7 V.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
そこで、本発明の目的は、容量が高く、且つ高密度に充填しても充放電サイクル特性が良好なリチウム二次電池用黒鉛系負極活物質、この負極活物質を含有するリチウム二次電池用負極、およびこの負極を備えたリチウム二次電池を提供することにある。
[1] 粉末X線回折において、
d002が0.3354nm以上0.337nm以下、
Lc(004)が100nm未満、
La(110)が100nm以上、且つ
回折角(2θ):44°~45°に現れる(101)面に由来するピークの半値幅が0.65°以上である、 リチウム二次電池用黒鉛系負極活物質。
[2] 粉末X線回折におけるピーク強度比I(100)/I(101)が0.7以上1以下である、前記[1]に記載のリチウム二次電池用黒鉛系負極活物質。
[3] 該負極活物質とバインダーとを含んでなる合剤を銅箔上に塗布し、乾燥させ、次いで加圧成形することによって密度1.5g/cm3以上1.6g/cm3以下の合剤層を形成し、該合剤層をX線回折法によって測定したときのピーク強度比I(110)/I(004)が0.2以上である、前記[1]または[2]に記載のリチウム二次電池用黒鉛系負極活物質。
[4] BET比表面積が5m2/g以下で且つ体積平均粒子径D50が3μm以上30μm以下である、前記[1]~[3]のいずれかひとつに記載のリチウム二次電池用黒鉛系負極活物質。
[5] 粉末X線回折における回折角(2θ):44°~45°に現れる(101)面に由来するピークの半値幅が0.65°以上2°以下である、前記[1]~[4]のいずれかひとつに記載のリチウム二次電池用黒鉛系負極活物質。
[7] 軟化点200~350℃および固定炭素50~80質量%のピッチで表面処理されてなる、前記[1]~[5]のいずれかひとつに記載のリチウム二次電池用黒鉛系負極活物質。
[8] 前記ピッチの体積平均粒子径D50が1μm~10μmである、前記[7]に記載のリチウム二次電池用黒鉛系負極活物質。
[9] 前記ピッチは光学等方性のものである、前記[7]に記載のリチウム二次電池用黒鉛系負極活物質。
[11] メカノフュージョン法または湿式法にて表面処理することをさらに含む前記[10]に記載の製造方法。
[12] コークスの水分含有率が1.0%以下である前記[10]または[11]に記載の製造方法。
[14] 繊維径5nm以上0.2μm以下の気相法炭素繊維をさらに含有してなる前記[13]に記載のリチウム二次電池用負極。
[16] エチレンカーボネート、ジエチルカーボネート、ジメチルカーボネート、メチルエチルカーボネート、プロピレンカーボネート、ブチレンカーボネート、γ―ブチロラクトン、およびビニレンカーボネートからなる群から選ばれる少なくとも1種の溶媒を備えた前記[15]に記載のリチウム二次電池。
[18] 前記[15]または[16]に記載のリチウム二次電池を備えた発電システム。
[19] 前記[15]または[16]に記載のリチウム二次電池を備えた電気・電子機器。
本発明のリチウム二次電池用黒鉛系負極活物質は、粉末X線回折において、d002が、0.3354nm以上0.337nm以下、好ましくは0.3359nm以上0.3368nm以下である。d002は黒鉛の結晶性の高さを示している。
なお、d002は、黒鉛粉末の002回折線に基づいて、Braggの式 d=λ/sinθcから算出される面間隔である。
なお、Lc(004)は、黒鉛粉末の004回折線に基づいて算出される結晶子のc軸方向の厚みである。La(110)は、黒鉛粉末の110回折線に基づいて算出される結晶子のa軸方向の幅である。
(101)面に由来するピークの半値幅B101が0.65°以上であるということは、ピークとしては比較的ブロードであることを示している。このピークがブロードであるということは、黒鉛結晶のABAスタッキング構造の乱れを示していると考えられる。リチウムイオンが黒鉛層間に挿入される際に、ABAスタッキング構造からAAAスタッキング構造に変化することが知られている。ABAスタッキング構造に乱れがある場合には、リチウムイオンの挿入時の黒鉛スタッキング構造の変化がより低エネルギーで行われるのではないかと推測している。
さらに、本発明に係る負極活物質は、体積平均粒子径D50が、好ましくは3μm以上30μm以下、より好ましくは4μm以上25μm以下、さらに好ましくは4μm以上20μm以下である。この範囲の体積平均粒子径D50を有すると電極表面の平滑性が良好となり且つ電解液との望ましくない副反応が進み難くなる。
先ず、ベネズエラ産原油を減圧蒸留して残渣を得る。該残渣は、API比重が好ましくは1~5度、アスファルテン分が好ましくは10~50%、樹脂分が好ましくは5~30%、および硫黄分が好ましくは1~12%である。
該残渣をコーキングしてコークスを得る。コーキング方法は、ディレードコーキング法であってもよいし、フルードコーキング法であってもよい。得られたコークスを水によって切り出し、それを加熱し、水分含有率が好ましくは1.0%以下となるまで乾燥させる。
乾燥させたコークス塊を粉砕し、分級して、炭素粉体を得る。粉砕方法は特に限定されず、例えば、ハンマーミル、ピンミル、ジェットミル、ロッドミル、ACMパルベライザーなどの装置を用いる方法が挙げられる。分級後の炭素粉体の体積平均粒子径D50は、好ましくは3μm以上30μm以下、より好ましくは4μm以上25μm以下、さらに好ましくは4μm以上20μm以下である。
この炭素粉体を、好ましくは1000~3500℃、より好ましくは2000~3400℃、さらに好ましくは2500~3300℃で加熱処理して、黒鉛化する。このようにして本発明に係る負極活物質を得ることができる。
本発明のリチウム二次電池用負極は、本発明の負極活物質を含有してなるものである。
リチウム二次電池用負極において、該負極活物質は、通常、負極活物質層に含有されている。該負極活物質層は、前記負極活物質、バインダー、および必要に応じて配合される添加剤を含有する合剤を種々の成形法によって成形してなるものである。また、該負極活物質層には、通常、端子や導電線などとの通電を容易にするための集電体が積層されている。
導電性付与材としては、銀粉などの導電性金属粉;ファーネスブラック、ケッチェンブラック、アセチレンブラックなどの導電性カーボン粉;カーボンナノチューブ、カーボンナノファイバー、気相法炭素繊維などが挙げられる。本発明の負極においては、添加剤として気相法炭素繊維を含有させることが好ましい。気相法炭素繊維は、その繊維径が5nm以上0.2μm以下であることが好ましい。気相法炭素繊維の含有量は負極活物質層の質量に対して0.1~10質量%であることが好ましい。イオン透過性化合物としては、キチン、キトサンなどの多糖類、または該多糖類の架橋物などが挙げられる。増粘剤としては、カルボキシメチルセルロール、ポリビニルアルコールなどが挙げられる。
本発明のリチウム二次電池は、本発明のリチウム二次電池用負極を備えたものである。なお、本発明のリチウム二次電池はリチウムイオンキャパシタを含意する。
本発明のリチウム二次電池は、さらに、正極を備えている。正極は、リチウム二次電池に従来から使われてきたものを用いることができる。正極は、通常、正極活物質を含有する正極活物質層と、正極活物質層に積層された集電体とからなる。正極活物質としては、LiNiO2、LiCoO2、LiMn2O4などが挙げられる。該正極活物質層は、従来公知の正極活物質用の添加剤をさらに含有していてもよい。正極用の集電体としてはアルミニウムを含むものが好ましい。
液体電解質としては、リチウム塩の非水系溶媒溶液が挙げられる。リチウム塩としては、LiClO4、LiPF6、LiAsF6、LiBF4、LiSO3CF3、CH3SO3Li、CF3SO3Liなどが挙げられる。液体電解質に用いられる非水系溶媒としては、エチレンカーボネート、ジエチルカーボネート、ジメチルカーボネート、メチルエチルカーボネート、プロピレンカーボネート、ブチレンカーボネート、γ―ブチロラクトン、およびビニレンカーボネートからなる群から選ばれる少なくとも1種が好ましい。
粉末X線回折法により求めた。d002は、002回折線に基づいて、Braggの式 d=λ/sinθcから算出される面間隔である。Lc(004)は、004回折線に基づいて算出される結晶子のc軸方向の厚みである。La(110)は、110回折線に基づいて算出される結晶子のa軸方向の幅である。I(100)/I(101)は、101回折線のピーク強度に対する100回折線のピーク強度の比である。B101は、回折角(2θ):44°~45°に現れる101回折線のピーク半値幅である。
クレハ社製ポリフッ化ビニリデン(L#9130;n-メチル-2-ピロリドン溶液)を、固形分5質量%となるように、負極活物質に少量ずつ加えながら混練した。次いで、n-メチル-2-ピロリドンを加えて混練し、十分な流動性を持つように調整した。日本精機製作所社製脱泡ニーダーNBK-1を用いて500rpmで5分間混練を行い、ペースト状の合剤を得た。自動塗工機とクリアランス250μmのドクターブレードを用いて、前記合剤を銅箔上に塗布した。
合剤が塗布された銅箔を約80℃のホットプレート上に置いて水分を除去した。その後、真空乾燥機にて120℃で6時間乾燥させた。乾燥後、合剤中の固形分の質量と塗膜乾燥体積とから算出される電極密度が1.5g/cm3以上1.6g/cm3以下になるようにプレス機により加圧成形して、合剤層と銅箔とが積層されてなる電極シートを得た。電極シートを適当な大きさに切り取り、X線回折測定用のガラスセルに貼り付け、X線回折法で測定した。そして、ピーク強度比I(110)/I(004)を算出した。ピーク強度比I(110)/I(004)は、黒鉛の配向性を示している。
窒素吸着を利用したBET法により解析して比表面積を算出した。
黒鉛を極小型スパーテル2杯分、および非イオン性界面活性剤(トリトン-X)2滴を水50mlに添加し、3分間超音波分散させた。この分散液をMalvern社製レーザー回折式粒度分布測定器(Mastersizer)に投入し、粒度分布を測定し、体積平均粒子径D50を求めた。
ベネズエラ産原油を減圧蒸留して残渣を得た。該残渣は、API比重が2.3度、アスファルテン分が25%、樹脂分が15%、および硫黄分が6.0%であった。該残渣をディレードコーカーに投入し、コーキングして、コークスを得た。得られたコークスを水によって切り出し、それを120℃で加熱し、水分含有率1.0%以下となるまで乾燥させた。
乾燥させたコークス塊をホソカワミクロン社製のハンマーミルで粉砕し、日清エンジニアリング社製ターボクラシファイアーTC-15Nにて気流分級して、体積平均粒子径D50が17μmの炭素粉体を得た。
この炭素粉体を黒鉛製ルツボに充てんして、アチソン炉にて3200℃で加熱処理して、黒鉛A1を得た。物性を表1に示す。図1に黒鉛A1の粉末X線回折を示す。
気流分級にて体積平均粒子径D50が5μmの炭素粉体を得、それを、体積平均粒子径D50が17μmの炭素粉体に替えて用いた以外は実施例1と同じ手法で、黒鉛B1を得た。物性を表1に示す。
軟化点約275℃、固定炭素65質量%および体積平均粒子径D50が5μmの石油系光学等方性ピッチ 5質量部と、黒鉛A1 95質量部とを混ぜ合わせた。この混合物をホソカワミクロン社製メカノフュージョンシステムに入れて、高速回転させた。次いで、これを窒素ガス雰囲気下において1200℃で1時間熱処理した。冷却後、目開き45μmの篩を通して黒鉛A2を得た。なお、メカノフュージョンとは、複数の異なる素材粒子にある種の機械的エネルギーを加えて、メカノケミカル的な反応を起こさせ、新しい素材を創造する技術である。物性を表1に示す。
黒鉛A1に替えて黒鉛B1を用いた以外は実施例3と同じ手法で、黒鉛B2を得た。物性を表1に示す。
比較例として、球状天然黒鉛(以下、黒鉛C1と表記する。)、メソフェーズカーボン(以下、黒鉛Dと表記する。)および鱗片状人造黒鉛(以下、黒鉛Eと表記する。)を用意した。これらは市販品である。
また、黒鉛A1に替えて黒鉛C1を用いた以外は実施例3と同じ手法で黒鉛C2を得た。それらの物性を表1に示す。
実施例1~4および比較例1~4で用意した黒鉛をそれぞれ負極活物質とした。
これらの負極活物質を用いて下記の手法でリチウム二次電池を製造し、200回充放電サイクル後の放電容量保持率(%)を測定した。結果を表2に示す。
露点-80℃以下の乾燥アルゴンガス雰囲気下に保ったグローブボックス内で下記の操作を実施した。
コバルト酸リチウム(日本化学工業製正極材C-10)95質量部、バインダー(ポリフッ化ビニリデン:PVDF)3質量部、および導電材(アセチレンブラック)5質量部、にN-メチル-2-ピロリドンを加えてスラリー状合剤を得た。この合剤を厚さ25μmのアルミ箔上に塗布した。合剤が塗布されたアルミ箔を真空乾燥機にて120℃で6時間乾燥させた。乾燥後、合剤中の固形分の質量と塗膜乾燥体積とから算出される電極密度が約3.5g/cm3になるようにプレス機により加圧成形して、正極を得た。負極として、配向性の評価において作製した電極シートを用いた。
上記のコインセルを用いて以下のような定電流定電圧充放電試験を行った。
初回と2回目の充放電サイクルは、次のようにして行った。
レストポテンシャルから4.2Vまでを0.17mA/cm2で定電流充電し、4.2Vに達した時点から4.2Vによる定電圧充電を行い、電流値が25.4μAに低下した時点で充電を停止させた。次いで、0.17mA/cm2で定電流放電を行い、電圧2.7Vでカットオフした。
レストポテンシャルから4.2Vまでを0.34mA/cm2(0.2Cに相当)で定電流充電し、4.2Vに達した時点から4.2Vによる定電圧充電を行い、電流値が20μAに低下した時点で充電を停止させた。次いで、1.7mA/cm2(1.0Cに相当)で定電流放電を行い、電圧2.7Vでカットオフした。
Claims (17)
- 粉末X線回折において、
d002が0.3354nm以上0.337nm以下、
Lc(004)が100nm未満、
La(110)が100nm以上、且つ
回折角(2θ):44°~45°に現れる(101)面に由来するピークの半値幅が0.65°以上である、
リチウム二次電池用黒鉛系負極活物質。 - 粉末X線回折におけるピーク強度比I(100)/I(101)が0.7以上1以下である、請求項1に記載のリチウム二次電池用黒鉛系負極活物質。
- 該負極活物質とバインダーとを含んでなる合剤を銅箔上に塗布し、乾燥させ、次いで加圧成形することによって密度1.5g/cm3以上1.6g/cm3以下の合剤層を形成し、該合剤層をX線回折法によって測定したときのピーク強度比I(110)/I(004)が0.2以上である、請求項1に記載のリチウム二次電池用黒鉛系負極活物質。
- BET比表面積が5m2/g以下で且つ体積平均粒子径D50が3μm以上30μm以下である、請求項1に記載のリチウム二次電池用黒鉛系負極活物質。
- 粉末X線回折における回折角(2θ):44°~45°に現れる(101)面に由来するピークの半値幅が0.65°以上2°以下である、請求項1に記載のリチウム二次電池用黒鉛系負極活物質。
- 表面処理されてなる、請求項1に記載のリチウム二次電池用黒鉛系負極活物質。
- 軟化点200~350℃および固定炭素50~80質量%のピッチで表面処理されてなる、請求項1に記載のリチウム二次電池用黒鉛系負極活物質。
- 前記ピッチの体積平均粒子径D50が1μm~10μmである、請求項7に記載のリチウム二次電池用黒鉛系負極活物質。
- 前記ピッチは光学等方性のものである、請求項7に記載のリチウム二次電池用黒鉛系負極活物質。
- API比重1~5度、アスファルテン分10~50%、樹脂分5~30%、および硫黄分1~12%を含む原油減圧蒸留残渣をコーキングしてコークスを得、該コークスを粉砕して炭素粉体を得、該炭素粉体を1000~3500℃で加熱処理することを含む請求項1に記載のリチウム二次電池用黒鉛系負極活物質の製造方法。
- メカノフュージョン法または湿式法にて表面処理することをさらに含む請求項10に記載の製造方法。
- コークスの水分含有率が1.0%以下である請求項10に記載の製造方法。
- 請求項1に記載のリチウム二次電池用黒鉛系負極活物質を含有してなるリチウム二次電池用負極。
- 繊維径5nm以上0.2μm以下の気相法炭素繊維をさらに含有してなる請求項13に記載のリチウム二次電池用負極。
- 請求項13に記載のリチウム二次電池用負極を備えたリチウム二次電池。
- エチレンカーボネート、ジエチルカーボネート、ジメチルカーボネート、メチルエチルカーボネート、プロピレンカーボネート、ブチレンカーボネート、γ―ブチロラクトン、およびビニレンカーボネートからなる群から選ばれる少なくとも1種の溶媒を備えた請求項15に記載のリチウム二次電池。
- 請求項15に記載のリチウム二次電池を備えた交通機関、発電システム、または電気・電子機器。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012527608A JP5960052B2 (ja) | 2010-08-05 | 2011-08-05 | リチウム二次電池用黒鉛系負極活物質 |
EP11814311.4A EP2602850B1 (en) | 2010-08-05 | 2011-08-05 | Method of producing a graphite active anode material for a lithium secondary battery |
KR1020137004157A KR101504614B1 (ko) | 2010-08-05 | 2011-08-05 | 리튬이차전지용 흑연계 음극활물질 |
US13/814,145 US8790824B2 (en) | 2010-08-05 | 2011-08-05 | Graphite anode active material for use in lithium secondary battery |
CN2011800383018A CN103053054A (zh) | 2010-08-05 | 2011-08-05 | 锂二次电池用石墨系负极活性物质 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-176783 | 2010-08-05 | ||
JP2010176783 | 2010-08-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012017676A1 true WO2012017676A1 (ja) | 2012-02-09 |
Family
ID=45559195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/004453 WO2012017676A1 (ja) | 2010-08-05 | 2011-08-05 | リチウム二次電池用黒鉛系負極活物質 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8790824B2 (ja) |
EP (1) | EP2602850B1 (ja) |
JP (1) | JP5960052B2 (ja) |
KR (1) | KR101504614B1 (ja) |
CN (1) | CN103053054A (ja) |
TW (1) | TWI499119B (ja) |
WO (1) | WO2012017676A1 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014010990A (ja) * | 2012-06-28 | 2014-01-20 | Toyota Motor Corp | 非水電解質二次電池およびその製造方法 |
JP2017063040A (ja) * | 2016-11-01 | 2017-03-30 | 昭和電工株式会社 | リチウムイオン電池用負極材及びその用途 |
JP2018056409A (ja) * | 2016-09-30 | 2018-04-05 | 旭化成株式会社 | 非水系リチウム型蓄電素子 |
JP2018156931A (ja) * | 2017-03-17 | 2018-10-04 | Tdk株式会社 | リチウムイオン二次電池用負極及びリチウムイオン二次電池 |
JP2018163868A (ja) * | 2017-03-27 | 2018-10-18 | 三菱ケミカル株式会社 | 非水系二次電池用負極材、非水系二次電池用負極及び非水系二次電池 |
WO2019124425A1 (ja) * | 2017-12-22 | 2019-06-27 | 東海カーボン株式会社 | リチウムイオン二次電池用負極材およびリチウムイオン二次電池用負極材の製造方法 |
US10615406B2 (en) | 2017-03-17 | 2020-04-07 | Tdk Corporation | Negative electrode for lithium ion secondary battery and lithium ion secondary battery |
JP2021128881A (ja) * | 2020-02-14 | 2021-09-02 | Jfeケミカル株式会社 | リチウムイオン二次電池負極材の被覆用ピッチおよびその製造方法 |
JP2022540521A (ja) * | 2019-12-06 | 2022-09-15 | 寧徳時代新能源科技股▲分▼有限公司 | 二次電池及びそれを備える装置 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI533495B (zh) * | 2010-08-05 | 2016-05-11 | 昭和電工股份有限公司 | 鋰蓄電池用負極活性物質 |
CN104766964B (zh) * | 2015-04-24 | 2017-01-25 | 深圳市玖创科技有限公司 | 天然石墨细粉掺杂处理用作负极材料的方法 |
CN108807847B (zh) | 2018-04-28 | 2019-05-07 | 宁德时代新能源科技股份有限公司 | 负极极片及电池 |
KR102486245B1 (ko) * | 2018-08-13 | 2023-01-10 | 주식회사 엘지에너지솔루션 | 리튬 이차전지용 음극 및 이를 포함하는 리튬 이차전지 |
CN115472827A (zh) * | 2021-06-10 | 2022-12-13 | 国家能源投资集团有限责任公司 | 煤基石墨负极材料及其制备方法和应用 |
CN114410329B (zh) * | 2022-02-10 | 2022-10-28 | 山西沁新能源集团股份有限公司 | 具有杂化碳的高碳焦及其制备方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005158718A (ja) | 2003-10-31 | 2005-06-16 | Showa Denko Kk | 電池電極用炭素材料、その製造方法及び用途 |
JP2007042620A (ja) | 2005-07-04 | 2007-02-15 | Showa Denko Kk | リチウム二次電池用負極、負極組成物の製造方法、及びリチウム二次電池 |
JP2007141677A (ja) | 2005-11-18 | 2007-06-07 | Showa Denko Kk | 複合黒鉛及びそれを用いたリチウム二次電池 |
WO2007072858A1 (ja) | 2005-12-21 | 2007-06-28 | Showa Denko K. K. | 複合黒鉛粒子及びそれを用いたリチウム二次電池 |
JP2009117257A (ja) * | 2007-11-08 | 2009-05-28 | Nippon Oil Corp | リチウムイオン二次電池負極材料用原料油組成物及びこれを用いた原料炭組成物の製造方法 |
JP2010165580A (ja) * | 2009-01-16 | 2010-07-29 | Mitsubishi Chemicals Corp | 非水電解質二次電池用負極活物質の製造方法、非水電解質二次電池用負極活物質及び負極並びに非水電解質二次電池 |
JP4738553B2 (ja) * | 2009-10-22 | 2011-08-03 | 昭和電工株式会社 | 黒鉛材料、電池電極用炭素材料、及び電池 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3556270B2 (ja) * | 1994-06-15 | 2004-08-18 | 株式会社東芝 | リチウム二次電池 |
US5491041A (en) * | 1994-10-14 | 1996-02-13 | Eic Laboratories, Inc. | Solid-state secondary batteries with graphite anodes |
JPH08298116A (ja) * | 1995-04-26 | 1996-11-12 | Kansai Coke & Chem Co Ltd | 二次電池の電極材料 |
CA2238286C (en) * | 1995-11-14 | 2004-02-17 | Osaka Gas Company Limited | Material for negative electrode of lithium secondary battery, method for production thereof and lithium secondary battery using the same |
JP3635044B2 (ja) * | 2001-06-08 | 2005-03-30 | 三井鉱山株式会社 | リチウム二次電池用負極材料、その製造方法、及びリチウム二次電池 |
JP4877568B2 (ja) | 2005-02-24 | 2012-02-15 | 日立化成工業株式会社 | リチウム二次電池用負極材料の製造方法 |
WO2007004728A1 (en) * | 2005-07-04 | 2007-01-11 | Showa Denko K.K. | Method for producing anode for lithium secondary battery and anode composition, and lithium secondary battery |
KR101365568B1 (ko) * | 2006-07-19 | 2014-02-20 | 니폰 카본 컴퍼니 리미티드 | 리튬 이온 2차 전지용 음극 활물질 및 이를 포함한 음극 |
JP5216285B2 (ja) * | 2007-09-18 | 2013-06-19 | Jx日鉱日石エネルギー株式会社 | リチウムイオン二次電池負極用非晶質炭素材料及びその製造方法 |
JP2009245940A (ja) * | 2008-03-13 | 2009-10-22 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
US9437344B2 (en) * | 2010-07-22 | 2016-09-06 | Nanotek Instruments, Inc. | Graphite or carbon particulates for the lithium ion battery anode |
-
2011
- 2011-08-05 WO PCT/JP2011/004453 patent/WO2012017676A1/ja active Application Filing
- 2011-08-05 JP JP2012527608A patent/JP5960052B2/ja active Active
- 2011-08-05 TW TW100127983A patent/TWI499119B/zh active
- 2011-08-05 KR KR1020137004157A patent/KR101504614B1/ko active IP Right Grant
- 2011-08-05 EP EP11814311.4A patent/EP2602850B1/en active Active
- 2011-08-05 US US13/814,145 patent/US8790824B2/en active Active
- 2011-08-05 CN CN2011800383018A patent/CN103053054A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005158718A (ja) | 2003-10-31 | 2005-06-16 | Showa Denko Kk | 電池電極用炭素材料、その製造方法及び用途 |
JP2007042620A (ja) | 2005-07-04 | 2007-02-15 | Showa Denko Kk | リチウム二次電池用負極、負極組成物の製造方法、及びリチウム二次電池 |
JP2007141677A (ja) | 2005-11-18 | 2007-06-07 | Showa Denko Kk | 複合黒鉛及びそれを用いたリチウム二次電池 |
WO2007072858A1 (ja) | 2005-12-21 | 2007-06-28 | Showa Denko K. K. | 複合黒鉛粒子及びそれを用いたリチウム二次電池 |
JP2009117257A (ja) * | 2007-11-08 | 2009-05-28 | Nippon Oil Corp | リチウムイオン二次電池負極材料用原料油組成物及びこれを用いた原料炭組成物の製造方法 |
JP2010165580A (ja) * | 2009-01-16 | 2010-07-29 | Mitsubishi Chemicals Corp | 非水電解質二次電池用負極活物質の製造方法、非水電解質二次電池用負極活物質及び負極並びに非水電解質二次電池 |
JP4738553B2 (ja) * | 2009-10-22 | 2011-08-03 | 昭和電工株式会社 | 黒鉛材料、電池電極用炭素材料、及び電池 |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014010990A (ja) * | 2012-06-28 | 2014-01-20 | Toyota Motor Corp | 非水電解質二次電池およびその製造方法 |
JP2018056409A (ja) * | 2016-09-30 | 2018-04-05 | 旭化成株式会社 | 非水系リチウム型蓄電素子 |
JP2017063040A (ja) * | 2016-11-01 | 2017-03-30 | 昭和電工株式会社 | リチウムイオン電池用負極材及びその用途 |
JP2018156931A (ja) * | 2017-03-17 | 2018-10-04 | Tdk株式会社 | リチウムイオン二次電池用負極及びリチウムイオン二次電池 |
JP7024439B2 (ja) | 2017-03-17 | 2022-02-24 | Tdk株式会社 | リチウムイオン二次電池用負極及びリチウムイオン二次電池 |
US10615406B2 (en) | 2017-03-17 | 2020-04-07 | Tdk Corporation | Negative electrode for lithium ion secondary battery and lithium ion secondary battery |
JP2018163868A (ja) * | 2017-03-27 | 2018-10-18 | 三菱ケミカル株式会社 | 非水系二次電池用負極材、非水系二次電池用負極及び非水系二次電池 |
JPWO2019124425A1 (ja) * | 2017-12-22 | 2020-12-24 | 東海カーボン株式会社 | リチウムイオン二次電池用負極材およびリチウムイオン二次電池用負極材の製造方法 |
KR20200101947A (ko) * | 2017-12-22 | 2020-08-28 | 도까이 카본 가부시끼가이샤 | 리튬 이온 이차 전지용 음극재 및 리튬 이온 이차 전지용 음극재의 제조 방법 |
EP3731315A4 (en) * | 2017-12-22 | 2021-10-27 | Tokai Carbon Co., Ltd. | NEGATIVE ELECTRODE MATERIAL FOR LITHIUM-ION SECONDARY BATTERY AND METHOD OF MANUFACTURING A NEGATIVE ELECTRODE MATERIAL FOR LITHIUM-ION SECONDARY BATTERY |
WO2019124425A1 (ja) * | 2017-12-22 | 2019-06-27 | 東海カーボン株式会社 | リチウムイオン二次電池用負極材およびリチウムイオン二次電池用負極材の製造方法 |
JP7201616B2 (ja) | 2017-12-22 | 2023-01-10 | 東海カーボン株式会社 | リチウムイオン二次電池用負極材の製造方法 |
US11646406B2 (en) | 2017-12-22 | 2023-05-09 | Tokai Carbon Co., Ltd. | Negative electrode material for lithium-ion secondary battery and method for producing negative electrode material for lithium-ion secondary battery |
KR102610410B1 (ko) | 2017-12-22 | 2023-12-06 | 도까이 카본 가부시끼가이샤 | 리튬 이온 이차 전지용 음극재 및 리튬 이온 이차 전지용 음극재의 제조 방법 |
JP2022540521A (ja) * | 2019-12-06 | 2022-09-15 | 寧徳時代新能源科技股▲分▼有限公司 | 二次電池及びそれを備える装置 |
JP7222147B2 (ja) | 2019-12-06 | 2023-02-14 | 寧徳時代新能源科技股▲分▼有限公司 | 二次電池及びそれを備える装置 |
US11961993B2 (en) | 2019-12-06 | 2024-04-16 | Contemporary Amperex Technology Co., Limited | Secondary battery and apparatus including the secondary battery |
JP2021128881A (ja) * | 2020-02-14 | 2021-09-02 | Jfeケミカル株式会社 | リチウムイオン二次電池負極材の被覆用ピッチおよびその製造方法 |
JP7185650B2 (ja) | 2020-02-14 | 2022-12-07 | Jfeケミカル株式会社 | リチウムイオン二次電池負極材の被覆用ピッチおよびその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2012017676A1 (ja) | 2013-10-03 |
US8790824B2 (en) | 2014-07-29 |
TW201225396A (en) | 2012-06-16 |
EP2602850A4 (en) | 2016-12-21 |
US20130130127A1 (en) | 2013-05-23 |
TWI499119B (zh) | 2015-09-01 |
EP2602850A1 (en) | 2013-06-12 |
JP5960052B2 (ja) | 2016-08-02 |
KR101504614B1 (ko) | 2015-03-20 |
CN103053054A (zh) | 2013-04-17 |
EP2602850B1 (en) | 2019-03-06 |
KR20130041226A (ko) | 2013-04-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5960053B2 (ja) | リチウム二次電池用負極活物質 | |
JP5960052B2 (ja) | リチウム二次電池用黒鉛系負極活物質 | |
JP5270050B1 (ja) | 複合黒鉛粒子およびその用途 | |
KR101461220B1 (ko) | 리튬 이차 전지용 음극 활물질, 이의 제조 방법, 그리고 이를 포함하는 음극 및 리튬 이차 전지 | |
JP5563578B2 (ja) | 複合黒鉛粒子及びそれを用いたリチウム二次電池 | |
KR101522911B1 (ko) | 리튬계 2차 전지용 음극, 탄소계 음극 활물질의 제조 방법, 리튬계 2차 전지 및 그 용도 | |
WO2012133788A1 (ja) | 非水系二次電池用黒鉛粒子及びその製造方法、負極並びに非水系二次電池 | |
JP6279713B2 (ja) | 電極用炭素質成形体、及びその製造方法 | |
JPWO2015159935A1 (ja) | リチウムイオン電池用負極材及びその用途 | |
JP5994319B2 (ja) | 非水系二次電池用複合黒鉛粒子の製造方法及びその製造方法で得られた複合黒鉛粒子、負極並びに非水系二次電池 | |
WO2018110263A1 (ja) | 複合黒鉛粒子、その製造方法及びその用途 | |
JP6297746B2 (ja) | 電池電極用炭素質成形体、及びその製造方法 | |
JP2017183205A (ja) | リチウム二次電池負極用材料及びその製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180038301.8 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11814311 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012527608 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13814145 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011814311 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 20137004157 Country of ref document: KR Kind code of ref document: A |