JP3953026B2 - リチウムイオン二次電池用極板およびリチウムイオン二次電池並びにその製造方法 - Google Patents
リチウムイオン二次電池用極板およびリチウムイオン二次電池並びにその製造方法 Download PDFInfo
- Publication number
- JP3953026B2 JP3953026B2 JP2003414484A JP2003414484A JP3953026B2 JP 3953026 B2 JP3953026 B2 JP 3953026B2 JP 2003414484 A JP2003414484 A JP 2003414484A JP 2003414484 A JP2003414484 A JP 2003414484A JP 3953026 B2 JP3953026 B2 JP 3953026B2
- Authority
- JP
- Japan
- Prior art keywords
- active material
- negative electrode
- material layer
- ion secondary
- lithium ion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims description 28
- 229910001416 lithium ion Inorganic materials 0.000 title claims description 28
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 50
- 239000011149 active material Substances 0.000 claims description 37
- 239000002002 slurry Substances 0.000 claims description 28
- 239000007773 negative electrode material Substances 0.000 claims description 21
- 239000011230 binding agent Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 19
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 239000007774 positive electrode material Substances 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 229910052744 lithium Inorganic materials 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 6
- 239000008151 electrolyte solution Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000007641 inkjet printing Methods 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 208000024891 symptom Diseases 0.000 claims 1
- 238000000034 method Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 9
- 150000002500 ions Chemical group 0.000 description 9
- 239000012528 membrane Substances 0.000 description 8
- 238000007600 charging Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000035515 penetration Effects 0.000 description 7
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 230000020169 heat generation Effects 0.000 description 5
- 239000011256 inorganic filler Substances 0.000 description 5
- 229910003475 inorganic filler Inorganic materials 0.000 description 5
- 238000009782 nail-penetration test Methods 0.000 description 5
- 239000005060 rubber Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000002033 PVDF binder Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 4
- 238000013021 overheating Methods 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 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
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000006230 acetylene black Substances 0.000 description 2
- 150000008360 acrylonitriles Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910021383 artificial graphite Inorganic materials 0.000 description 2
- 238000010277 constant-current charging Methods 0.000 description 2
- HHNHBFLGXIUXCM-GFCCVEGCSA-N cyclohexylbenzene Chemical compound [CH]1CCCC[C@@H]1C1=CC=CC=C1 HHNHBFLGXIUXCM-GFCCVEGCSA-N 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000002003 electrode paste Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000007756 gravure coating Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical group C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229910014195 BM-400B Inorganic materials 0.000 description 1
- 229910014199 BM-720H Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 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
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 238000010280 constant potential charging Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000007607 die coating method Methods 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 150000002642 lithium compounds Chemical class 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
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- 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
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- 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
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- H—ELECTRICITY
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- 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
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- 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
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
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- H01M10/058—Construction or manufacture
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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- 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
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- H01M4/0414—Methods of deposition of the material by screen printing
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- H01M4/02—Electrodes composed of, or comprising, active material
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- H—ELECTRICITY
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- 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
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- 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
- H01M4/139—Processes of manufacture
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- 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
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
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- 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
- H01G11/04—Hybrid capacitors
- H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- 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
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- H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Power Engineering (AREA)
- Composite Materials (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
- Cell Separators (AREA)
Description
しかしながら、これら樹脂からなるフィルム状セパレータは、概して高温で収縮しやすい。よって内部短絡時や、釘のような鋭利な形状の突起物が電池を貫いた時、瞬時に発生する短絡反応熱によりセパレータが収縮して短絡部が拡大し、さらに多大な反応熱を発生させ、異常過熱を促進するという課題を有していた。
そこで、上記課題を含めた安全性を向上させるために、活物質層表面に固体微粒子を含む多孔性コーティング膜を塗布形成する技術が提案されている。(特許文献1参照)
性を高めることができる。特に、セパレータがポリオレフィン系微多孔フィルムを備えることはより好ましい。ポリオレフィン系微多孔フィルムが高温では閉孔(いわゆるシャットダウン)するため、より安全性の高い電池となる。
安全性に優れ、かつ高特性の電池となる。
きる。さらにノズル側も走査させれば、曲線状やジグザグ線状のパターンを形成することができる。また、間欠的に吐出すればドット状の島状パターンを形成することができる。
り、過充電時の安定性を保証するために、ビニレンカーボネート(VC)やシクロヘキシルベンゼン(CHB)等を添加することも可能である。
(正極の作製)コバルト酸リチウム3kgを、呉羽化学(株)製PVDF#132
0(固形分12重量%のN−メチルピロリドン(NMP)溶液)1kg、アセチレンブラック90gおよび適量のNMPとともに双腕式練合機にて攪拌し、正極ペーストを作製した。このペーストを15μm厚のアルミニウム箔に塗布乾燥し、総厚が160μmとなるように圧延した後、円筒型18650ケースに挿入可能な幅にスリットし、正極板を得た。
ン共重合体ゴム粒子結着剤BM−400B(固形分40重量%)75g、CMC30gおよび適量の水とともに双腕式練合機にて攪拌し、負極ペーストを作製した。このペーストを10μm厚の銅箔に塗布乾燥し、総厚が180μmとなるように圧延した後、円筒型18650ケースに挿入可能な幅にスリットし、負極板を得た。
メディアン径0.3μmのアルミナ950gを、日本ゼオン(株)製ポリアクリロ
ニトリル変性ゴム結着剤BM−720H(固形分8重量%)625gおよび適量のNMPとともに双腕式練合機にて攪拌し、無機フィラーと樹脂バインダーを含んだ多孔質絶縁層形成用スラリーを調製した。
(電池の作製)これらの正負極を、20μm厚のポリエチレン微多孔フィルムをセパレータとして捲回構成し、所定の長さで切断して電槽缶内に挿入し、EC・DMC・EMC混合溶媒にLiPF6を1MとVCを3重量%溶解させた電解液を、5.5g添加して封口し、設計容量2000mAhの円筒型18650リチウムイオン二次電池を作製した。
(実施例2)
実施例1とはグラビアコートのパターンを変更し、他は同様の方法で実施例2の電池を作製した。多孔質絶縁層の膜厚は6umで、格子状パターンの線幅Xは100μm、線間隔Yは400μmであり、多孔質絶縁層形成領域は全負極表面積の36%を占めた。
(実施例3)
実施例1とはグラビアコートのパターンを変更し、他は同様の方法で実施例3の電池を作製した。多孔質絶縁層の膜厚は6umで、格子状パターンの線幅Xは300μm、線間隔Yは200μmであり、多孔質絶縁層形成領域は全負極表面積の84%を占めた。
実施例1と同様にして調製した多孔質絶縁層形成用スラリーを、負極板上にダイコータを用いて、活物質層上に薄く塗布した後、静置して塗膜をレベリングさせた。負極の活物質層の凹部には多孔質絶縁層が形成され、その厚みは3μmであった。活物質層の凸部には多孔質絶縁層は形成されず、形成領域は全負極表面積の60%を占めていた。
(実施例5)
実施例1と同様にして調製した多孔質絶縁層形成用スラリーを、図2(b)のようにインクジェット印刷を用いて負極活物質層上に直線状に塗布した。インクジェットへッド800μmの間隔で並べられたノズルから、スラリーを60回/秒で吐出させながら、対向させた負極板を1.4m/分で移動させた。吐出周波数に対して負極移動速度が十分に小さいため、吐出されたスラリーは負極上で連続的な直線となって描かれた。線幅Xは500μm、線間隔Yは300μmで、多孔質絶縁層形成領域は全負極表面積の63%、多孔質絶縁層の厚みは4μmであった。
(実施例6)
実施例5の負極移動速度を2m/分に変え、他は同様におこなった。吐出周波数に対して負極移動速度が速いため、吐出されたスラリーは負極上で、図2(a)に示す様に不連続な島状となって描かれた。描かれた島の大きさは約500μmで、多孔質絶縁層形成領域は全負極表面積の40%、多孔質絶縁層の厚みは4μmであった。
(実施例7)
実施例1と同様にして調製した多孔質絶縁層形成用スラリーをスプレーコートによって負極活物質層上に塗布した。活物質層上に薄く塗布した後、静置して塗膜をレベリングさせた。負極の活物質層の凹部には多孔質絶縁層が形成され、その厚みは2μmであった。活物質層の凸部には多孔質絶縁層は形成されず、形成領域は全負極表面積の55%を占めていた。
(比較例1)
実施例1に準じて正極、負極を作製し、多孔質絶縁層を形成することなく電池を作製したものを比較例1とする。
(比較例2)
多孔質絶縁層の形成領域を19%となるように格子状パターンの線幅Xを50μm、線間隔Yを450μmとし、他は実施例1と同様の方法で電池作製したものを比較例2とした。
(比較例3)
多孔質絶縁層の形成領域を91%となるように格子状パターンの線幅Xを350μm、線間隔Yを150μmとし、他は実施例1と同様の方法で電池作製したものを比較例3と
した。
後、20℃環境下で以下の2通りの充放電試験を行った。
(釘刺し安全性)
電池充放電特性評価後の電池について、20℃環境下で、まず、1400mAの充電電流で充電電圧が4.25Vになるまで定電流充電を行ない、その4.25Vのまま、充電電流が100mAなるまで定電圧充電を行なった。
1a 正極活物質層
2 負極
2a 負極活物質層
3 セパレータ
4 多孔膜絶縁層
5 多孔膜絶縁層の形成領域
6 多孔膜絶縁層の非形成領域
7 活物質粒子
Claims (6)
- 活物質粒子を含む活物質層と、前記活物質層の表面に形成された多孔質絶縁層とを備えた正極板もしくは負極板において、前記多孔質絶縁層は無機酸化物フィラーと樹脂バインダーとを含み、前記多孔質絶縁層は形成領域と非形成領域とを有し、前記形成領域と非形成領域が500μm以下の微細なパターンであり、前記形成領域が、活物質表面の20〜90%の面積を占めることを特徴とするリチウムイオン二次電池用極板。
- リチウム複合酸化物粒子を含む正極活物質層を備えた正極板と、負極活物質粒子を含む負極活物質層を備えた負極板と、前記正負極板間に介在するセパレータと、非水溶媒を含む電解液とを備えたリチウムイオン二次電池において、前記正極板または前記負極板は、請求項1記載のリチウムイオン二次電池用極板であることを特徴とするリチウムイオン二次電池。
- 前記セパレータがポリオレフィン系微多孔フィルムであることを特徴とする請求項2記載のリチウムイオン二次電池。
- リチウム複合酸化物粒子を含む正極活物質層を備えた正極板と、負極活物質粒子を含む負極活物質層を備えた負極板と、前記正極活物質層または前記負極活物質層のうち少なくともいずれかの表面に設けられた多孔質絶縁層と、前記正負極板間に介在するセパレータとを少なくとも備えたリチウムイオン二次電池の製造方法であって、少なくとも無機酸化物フィラーと樹脂バインダーと溶剤とを混合してスラリー化する工程と、 前記正極活物質層または前記負極活物質層のうち少なくともいずれかの表面に前記スラリーをインクジェット印刷によってパターン塗布する工程とを有し、前記パターンは、形成領域と非形成領域が500μm以下の微細なパターンであり、かつ、前記形成領域が、活物質表面の20〜90%の面積を占めることを特徴とするリチウムイオン二次電池の製造方法。
- リチウム複合酸化物粒子を含む正極活物質層を備えた正極板と、負極活物質粒子を含む負極活物質層を備えた負極板と、前記正極活物質層または前記負極活物質層のうち少なくともいずれかの表面に設けられた多孔質絶縁層と、前記正負極板間に介在するセパレータとを少なくとも備えたリチウムイオン二次電池の製造方法であって、少なくとも無機酸化
物フィラーと樹脂バインダーと溶剤とを混合してスラリー化する工程と、前記正極活物質層または前記負極活物質層のうち少なくともいずれかの表面に前記スラリーを塗布する工程と、前記の塗布されたスラリーをレベリングさせてスラリーの塗布領域と非塗布領域を設ける工程とを有し、前記形成領域と非形成領域が500μm以下の微細なパターンであり、前記形成領域が、活物質表面の20〜90%の面積を占めることを特徴とするリチウムイオン二次電池の製造方法。 - スラリーを塗布する手段がスプレー塗布である請求項5記載のリチウムイオン二次電池の製造方法。
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JP2003414484A JP3953026B2 (ja) | 2003-12-12 | 2003-12-12 | リチウムイオン二次電池用極板およびリチウムイオン二次電池並びにその製造方法 |
KR1020067000397A KR100677014B1 (ko) | 2003-12-12 | 2004-12-01 | 리튬이온 2차전지용 전극, 그것을 이용하는 리튬이온2차전지 및 그 제조 방법 |
CNB2004800187031A CN100385711C (zh) | 2003-12-12 | 2004-12-01 | 用于锂离子二次电池的电极、使用该电极的锂离子二次电池、和所述电池的制备方法 |
US10/557,005 US7759004B2 (en) | 2003-12-12 | 2004-12-01 | Electrode for lithium ion secondary batteries, lithium ion secondary battery using the same, and method for manufacturing the battery |
EP11186952A EP2466669A1 (en) | 2003-12-12 | 2004-12-01 | Electrode for lithium ion secondary batteries, lithium ion secondary battery using the same, and method for manufacturing the battery |
EP04820155A EP1696499B1 (en) | 2003-12-12 | 2004-12-01 | Electrode for lithium ion secondary battery, lithium ion secondary battery using same, and method for producing such lithium ion secondary battery |
PCT/JP2004/017868 WO2005057691A1 (ja) | 2003-12-12 | 2004-12-01 | リチウムイオン二次電池用電極、それを用いるリチウムイオン二次電池およびその製造方法 |
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WO2021100769A1 (en) | 2019-11-20 | 2021-05-27 | Ricoh Company, Ltd. | Electrode, method of manufacturing the same, and electrochemical device |
EP4207335A2 (en) | 2021-12-20 | 2023-07-05 | Ricoh Company, Ltd. | Electrode, electrochemical device, electrode treatment method, electrode manufacturing method, electrode manufacturing apparatus, insulating layer, and insulating layer manufacturing method |
EP4243043A2 (en) | 2022-03-09 | 2023-09-13 | Ricoh Company, Ltd. | Electrode, electrochemical element, apparatus for manufacturing electrode, and method of manufacturing electrode |
Also Published As
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EP2466669A1 (en) | 2012-06-20 |
EP1696499B1 (en) | 2012-06-06 |
EP1696499A1 (en) | 2006-08-30 |
WO2005057691A1 (ja) | 2005-06-23 |
CN100385711C (zh) | 2008-04-30 |
US7759004B2 (en) | 2010-07-20 |
KR100677014B1 (ko) | 2007-02-01 |
KR20060030898A (ko) | 2006-04-11 |
CN1816922A (zh) | 2006-08-09 |
EP1696499A4 (en) | 2009-08-26 |
US20070072083A1 (en) | 2007-03-29 |
JP2005174792A (ja) | 2005-06-30 |
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