KR20180015629A - 리튬 이차 전지용 정극 활물질의 제조 방법 - Google Patents
리튬 이차 전지용 정극 활물질의 제조 방법 Download PDFInfo
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- KR20180015629A KR20180015629A KR1020177034041A KR20177034041A KR20180015629A KR 20180015629 A KR20180015629 A KR 20180015629A KR 1020177034041 A KR1020177034041 A KR 1020177034041A KR 20177034041 A KR20177034041 A KR 20177034041A KR 20180015629 A KR20180015629 A KR 20180015629A
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- heat treatment
- precursor
- positive electrode
- active material
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- 239000007774 positive electrode material Substances 0.000 title claims abstract description 117
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 87
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 204
- 239000002243 precursor Substances 0.000 claims abstract description 130
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 78
- 230000001590 oxidative effect Effects 0.000 claims abstract description 75
- 150000001875 compounds Chemical class 0.000 claims abstract description 71
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims abstract description 49
- 229910052808 lithium carbonate Inorganic materials 0.000 claims abstract description 48
- 238000010304 firing Methods 0.000 claims abstract description 42
- 239000002131 composite material Substances 0.000 claims abstract description 41
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 30
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 23
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims description 27
- 239000007924 injection Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 26
- 238000011144 upstream manufacturing Methods 0.000 claims description 22
- 235000011089 carbon dioxide Nutrition 0.000 claims description 18
- 229910052719 titanium Inorganic materials 0.000 claims description 14
- 238000001354 calcination Methods 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 229910052758 niobium Inorganic materials 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- 239000011149 active material Substances 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 105
- 229910052759 nickel Inorganic materials 0.000 abstract description 44
- 239000007789 gas Substances 0.000 description 94
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 57
- 239000001301 oxygen Substances 0.000 description 57
- 229910052760 oxygen Inorganic materials 0.000 description 57
- 239000010936 titanium Substances 0.000 description 34
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 27
- 238000006243 chemical reaction Methods 0.000 description 16
- 239000000843 powder Substances 0.000 description 16
- 239000013078 crystal Substances 0.000 description 14
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 12
- 229910001882 dioxygen Inorganic materials 0.000 description 12
- 238000005259 measurement Methods 0.000 description 12
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- 230000008569 process Effects 0.000 description 11
- 229910052723 transition metal Inorganic materials 0.000 description 11
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 230000002829 reductive effect Effects 0.000 description 9
- 150000003624 transition metals Chemical class 0.000 description 9
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- 150000004679 hydroxides Chemical class 0.000 description 7
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 6
- 229910052748 manganese Inorganic materials 0.000 description 6
- -1 nickel is lowered Chemical class 0.000 description 6
- 239000007858 starting material Substances 0.000 description 6
- 229910017052 cobalt Inorganic materials 0.000 description 5
- 239000010941 cobalt Substances 0.000 description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 5
- 238000005755 formation reaction Methods 0.000 description 5
- 239000011812 mixed powder Substances 0.000 description 5
- 239000010955 niobium Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- 150000001242 acetic acid derivatives Chemical class 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
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- 230000001747 exhibiting effect Effects 0.000 description 3
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- 238000003860 storage Methods 0.000 description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 2
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- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 2
- 239000011255 nonaqueous electrolyte Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
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- 238000000197 pyrolysis Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000000967 suction filtration Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 150000003623 transition metal compounds Chemical class 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- 229910015118 LiMO Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910021314 NaFeO 2 Inorganic materials 0.000 description 1
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
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- 239000000956 alloy Substances 0.000 description 1
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- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
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- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910021446 cobalt carbonate Inorganic materials 0.000 description 1
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 238000003795 desorption Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
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- 230000003028 elevating effect Effects 0.000 description 1
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- 239000010903 husk Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
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- XIXADJRWDQXREU-UHFFFAOYSA-M lithium acetate Chemical compound [Li+].CC([O-])=O XIXADJRWDQXREU-UHFFFAOYSA-M 0.000 description 1
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 description 1
- 235000006748 manganese carbonate Nutrition 0.000 description 1
- 239000011656 manganese carbonate Substances 0.000 description 1
- 229940093474 manganese carbonate Drugs 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 1
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
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- 239000007773 negative electrode material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910000652 nickel hydride Inorganic materials 0.000 description 1
- 229910001453 nickel ion Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
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- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 description 1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Complex oxides containing nickel and at least one other metal element
- C01G53/42—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2
- C01G53/44—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese
- C01G53/50—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Complex oxides containing nickel and at least one other metal element
- C01G53/42—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Complex oxides containing nickel and at least one other metal element
- C01G53/42—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/08—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances oxides
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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- C01P2002/52—Solid solutions containing elements as dopants
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/50—Solid solutions
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- C01P2002/54—Solid solutions containing elements as dopants one element only
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/76—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by a space-group or by other symmetry indications
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/85—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by XPS, EDX or EDAX data
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- C—CHEMISTRY; METALLURGY
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
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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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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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
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Abstract
Description
도 2는, 리튬 이차 전지용 정극 활물질의 제조에 사용하는 로터리 킬른의 개략 구조를 도시하는 도면이다.
S2: 소성 공정
S21: 제1 열 처리 공정
S22: 제2 열 처리 공정
S23: 제3 열 처리 공정
1: 로터리 킬른(소성로)
10: 노심관
20: 히터
30: 제1 급기관
32: 분사구
40: 제2 급기관
50: 리프터
110: 예열 대역
120: 가열 대역
Ma: 피처리물
Claims (6)
- 탄산리튬과, 하기 식 (1) 중의 Li 이외의 금속 원소를 포함하는 화합물을 혼합하는 혼합 공정과,
상기 혼합 공정을 거쳐서 얻어진 전구체를 소성하여 하기 식 (1)로 표시되는 리튬 복합 화합물을 얻는 소성 공정을 갖고,
상기 소성 공정은,
상기 전구체를 소성로의 노심관(爐心管) 내에서 전동(轉動)시키면서 열 처리를 행하는 열 처리 공정을 적어도 갖고,
상기 소성로는,
상기 노심관의 내주면측을 향하여 산화성 가스를 분사하는 제1 급기 계통과,
당해 노심관의 축 방향을 향하여 산화성 가스를 흘리는 제2 급기 계통을 구비하고,
상기 열 처리 공정에 있어서는,
상기 노심관 내에서 상류측으로부터 하류측을 향하여 전동하면서 유하하는 상기 전구체에 상기 제1 급기 계통에 의해 상기 산화성 가스를 분사함과 함께, 상기 전구체로부터 발생하는 탄산 가스를 상기 제2 급기 계통에 의한 상기 산화성 가스의 기류에서 배기하면서 상기 열 처리를 행하는 것을 특징으로 하는 리튬 이차 전지용 정극 활물질의 제조 방법.
Li1+aM1O2+α…(1)
(단, 상기 식 (1) 중, M1은 Li 이외의 금속 원소이며 적어도 Ni를 포함하고, M1당에 있어서의 상기 Ni의 비율이 70원자%를 초과하고, a 및 α는 -0.1≤a≤0.2, -0.2≤α≤0.2를 충족하는 수임) - 제1항에 있어서, 상기 제2 급기 계통은, 상기 노심관의 하류측으로부터 상류측을 향하여 상기 산화성 가스를 흘리는 것을 특징으로 하는 리튬 이차 전지용 정극 활물질의 제조 방법.
- 제1항 또는 제2항에 있어서, 상기 소성로는,
상기 노심관 내의 상류측의 측면에 배기구를 갖고,
상기 열 처리 공정에 있어서는,
상기 탄산 가스를 상기 배기구를 통하여 상기 노심관의 축 방향으로부터 배출하는 것을 특징으로 하는 리튬 이차 전지용 정극 활물질의 제조 방법. - 제1항 내지 제3항 중 어느 한 항에 있어서, 상기 소성로는,
상기 노심관의 내주면 중 상기 열 처리에 있어서 가열되는 대역에만 리프터를 구비하고,
상기 열 처리 공정에 있어서는,
가열되고 있는 상기 전구체를 상기 리프터에 의해 교반하면서 열 처리를 행하는 것을 특징으로 하는 리튬 이차 전지용 정극 활물질의 제조 방법. - 제1항 내지 제4항 중 어느 한 항에 있어서, 상기 제1 급기 계통에 의한 상기 산화성 가스의 분사량, 분사 각도 및 산소 농도 중 적어도 하나를 조절하여 열 처리를 행하는 것을 특징으로 하는 리튬 이차 전지용 정극 활물질의 제조 방법.
- 제1항 내지 제5항 중 어느 한 항에 있어서, 탄산리튬과, 하기 식 (2) 중의 Li 이외의 금속 원소를 포함하는 화합물을 혼합하는 혼합 공정과,
상기 혼합 공정을 거쳐서 얻어진 전구체를 소성하여 하기 식 (2)로 표시되는 리튬 복합 화합물을 얻는 소성 공정을 갖고,
상기 소성 공정은,
상기 혼합 공정에서 얻어진 혼합물을 200℃ 이상 또한 400℃ 이하의 열 처리 온도에서 0.5시간 이상 또한 5시간 이하에 걸쳐 열 처리함으로써 제1 전구체를 얻는 제1 열 처리 공정과,
상기 제1 전구체를 450℃ 이상 또한 900℃ 이하의 열 처리 온도에서 0.1시간 이상 또한 50시간 이하에 걸쳐 열 처리를 행함으로써 제2 전구체를 얻는 제2 열 처리 공정과,
상기 제2 전구체를 700℃ 이상 또한 900℃ 이하의 열 처리 온도에서 0.1시간 이상 또한 50시간 이하에 걸쳐 열 처리를 행함으로써 상기 리튬 복합 화합물을 얻는 제3 열 처리 공정을 갖고,
상기 제2 열 처리 공정 및 상기 제3 열 처리 공정 중 어느 한쪽 또는 양쪽의 열 처리 공정을, 상기 노심관 내에서 상류측으로부터 하류측을 향하여 전동하면서 유하하는 상기 제1 전구체 또는 상기 제2 전구체에 산화성 가스를 분사함과 함께, 상기 제1 전구체 또는 상기 제2 전구체로부터 발생하는 탄산 가스를 산화성 가스의 기류에서 배기하면서 열 처리하는 것을 특징으로 하는 리튬 이차 전지용 정극 활물질의 제조 방법.
Li1+aNibMncCodM2eO2+α…(2)
(단, 상기 식 (2) 중, M2는, Mg, Al, Ti, Zr, Mo 및 Nb로 이루어지는 군에서 선택되는 적어도 1종의 원소이고, a, b, c, d, e 및 α는 -0.1≤a≤0.2, 0.7<b≤0.9, 0≤c<0.3, 0≤d<0.3, 0≤e≤0.25, b+c+d+e=1 및 -0.2≤α≤0.2를 충족하는 수임)
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US20180316004A1 (en) | 2018-11-01 |
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JP2018160470A (ja) | 2018-10-11 |
JP6369644B2 (ja) | 2018-08-08 |
WO2017213002A1 (ja) | 2017-12-14 |
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