KR101396002B1 - 다결정 코발트-니켈-망간 삼원 양극재료, 그의 제조방법, 및 리튬이온 2차전지 - Google Patents
다결정 코발트-니켈-망간 삼원 양극재료, 그의 제조방법, 및 리튬이온 2차전지 Download PDFInfo
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- KR101396002B1 KR101396002B1 KR1020127007380A KR20127007380A KR101396002B1 KR 101396002 B1 KR101396002 B1 KR 101396002B1 KR 1020127007380 A KR1020127007380 A KR 1020127007380A KR 20127007380 A KR20127007380 A KR 20127007380A KR 101396002 B1 KR101396002 B1 KR 101396002B1
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims description 16
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 title abstract description 4
- 229910018871 CoO 2 Inorganic materials 0.000 claims abstract description 38
- 239000010406 cathode material Substances 0.000 claims abstract description 34
- 230000014759 maintenance of location Effects 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 230000006835 compression Effects 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims abstract description 11
- 239000010405 anode material Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims description 42
- 239000002243 precursor Substances 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 19
- 229910020680 Co—Ni—Mn Inorganic materials 0.000 claims description 15
- 239000013078 crystal Substances 0.000 claims description 15
- 229910052748 manganese Inorganic materials 0.000 claims description 15
- 229910052759 nickel Inorganic materials 0.000 claims description 15
- 238000005245 sintering Methods 0.000 claims description 13
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 11
- -1 salt compound Chemical class 0.000 claims description 11
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 8
- 238000010298 pulverizing process Methods 0.000 claims description 8
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 239000007774 positive electrode material Substances 0.000 claims description 7
- 229910002651 NO3 Inorganic materials 0.000 claims description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 125000004122 cyclic group Chemical group 0.000 claims description 5
- 239000007772 electrode material Substances 0.000 claims description 5
- 229910009891 LiAc Inorganic materials 0.000 claims description 4
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- 238000003801 milling Methods 0.000 claims description 4
- 150000003891 oxalate salts Chemical class 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010902 jet-milling Methods 0.000 claims description 2
- 150000005323 carbonate salts Chemical class 0.000 claims 1
- 230000001351 cycling effect Effects 0.000 claims 1
- 239000011572 manganese Substances 0.000 abstract description 87
- 230000004927 fusion Effects 0.000 abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 103
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 238000002441 X-ray diffraction Methods 0.000 description 9
- 238000001228 spectrum Methods 0.000 description 9
- 229910012971 LiCo2/10Ni5/10Mn3/10O2 Inorganic materials 0.000 description 8
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 8
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 8
- 239000011149 active material Substances 0.000 description 7
- 229910012735 LiCo1/3Ni1/3Mn1/3O2 Inorganic materials 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 229910013733 LiCo Inorganic materials 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 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
- 238000002156 mixing Methods 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 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
- 239000004917 carbon fiber Substances 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
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- 239000003575 carbonaceous material Substances 0.000 description 3
- 229910021446 cobalt carbonate Inorganic materials 0.000 description 3
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- 239000011255 nonaqueous electrolyte Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
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- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
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- 238000009831 deintercalation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000009830 intercalation Methods 0.000 description 2
- 229940093474 manganese carbonate Drugs 0.000 description 2
- 235000006748 manganese carbonate Nutrition 0.000 description 2
- 239000011656 manganese carbonate Substances 0.000 description 2
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 2
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000002931 mesocarbon microbead Substances 0.000 description 2
- 229910000008 nickel(II) carbonate Inorganic materials 0.000 description 2
- ZULUUIKRFGGGTL-UHFFFAOYSA-L nickel(ii) carbonate Chemical compound [Ni+2].[O-]C([O-])=O ZULUUIKRFGGGTL-UHFFFAOYSA-L 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
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- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 239000002388 carbon-based active material Substances 0.000 description 1
- 239000006182 cathode active material Substances 0.000 description 1
- QGUAJWGNOXCYJF-UHFFFAOYSA-N cobalt dinitrate hexahydrate Chemical compound O.O.O.O.O.O.[Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O QGUAJWGNOXCYJF-UHFFFAOYSA-N 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011245 gel electrolyte Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- 229920005989 resin Polymers 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
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- 239000011343 solid material Substances 0.000 description 1
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- 238000010998 test method Methods 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
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- 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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- C01G45/1257—Manganates or manganites with trivalent manganese, tetravalent manganese or mixtures thereof of the type (MnO3)n-, e.g. CaMnO3 containing lithium, e.g. Li2MnO3 or Li2(MxMn1-x)O3
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Abstract
Description
도 2는 실시예 8의 엑스선 회절 스펙트럼이다.
도 3은 실시예 9의 엑스선 회절 스펙트럼이다.
도 4는 참고예 10의 엑스선 회절 스펙트럼이다.
도 5는 실시예 11의 엑스선 회절 스펙트럼이다.
도 6은 실시예 12의 엑스선 회절 스펙트럼이다.
도 7은 실시예 13의 엑스선 회절 스펙트럼이다.
도 8은 참고예 14의 엑스선 회절 스펙트럼이다.
도 9는 실시예 15의 엑스선 회절 스펙트럼이다.
Claims (7)
- LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3 (상기 식에서 x, y, x+y<1, z≥1이다) 중 2종 이상의 베이스 결정체 구조를 가지고, 다결정 층상 구조이며, 원소 Li:Co:Ni:Mn의 몰비=1~1.2:0.4~0.7:0.2~0.5:0.1~0.3이고, 입도가 8~20미크론이며, 압축밀도가 3.9~4.3g/cm3이고, 방전배율이 0.5~1C일 때 용량이 145mAh/g 이상이며, 300회 순환 용량유지율이 90% 이상인 것을 특징으로 하는 다결정 Co-Ni-Mn 삼원 양극재료.
- 하기 단계를 포함하는 다결정 Co-Ni-Mn 삼원 양극재료의 제조 방법:
1. 전구체의 제조: 6~25g의 폴리에틸렌 글리콜을 리튬원소 농도가 1.0~1.2 mol/L인 LiAc, LiOH 또는 LiNO3 용액 300~500ml 중에 넣고, Co, Ni, Mn 원소의 염류 화합물의 1종 이상을 적가하여 혼합한 후, 20~60℃, 회전속도 20~120rpm의 조건하에서 120분간 교반하고, Co, Ni, Mn 원소의 총함량이 0.3~1.0mol이 되게 하고, 혼합물을 직접 박스식 로 안에 넣고 150~250℃ 온도하에서 2~10시간 건조 탈수하고, 회전속도 200~1000rpm의 볼밀로 30분간 분산시킴으로써 LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2 또는 Li2MnO3 (상기 식에서 x, y, x+y<1, z≥1이다)의 산화물 전구체를 얻는다;
2. 다결정 Co-Ni-Mn 삼원 양극재료의 제조는 전구체 복합 소결법을 사용하거나: LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3의 산화물 전구체 2종 이상을 Li:Co:Ni:Mn의 몰비= 1~1.2:0.4~0.7:0.2~0.5:0.1~0.3에 따라, 회전속도 200~1000rpm의 볼밀로 60분간 균일하게 혼합한 후, 혼합물을 직접 박스식 로 안에 넣고 750~950℃의 온도하에서 5~15시간 소결하고, 자연 냉각하여 실온까지 온도를 낮추어 기류분쇄를 진행하며, 기압을 0.4~1.0MPa로 하여 다결정 Co-Ni-Mn 삼원 양극재료를 얻는다;
또는 중간체 복합 소결법을 사용하거나: LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3의 전구체 각각을 직접 박스식 로 안에 넣고, 600~850℃의 온도하에서 5~15시간 초기 소결시키고, Li:Co:Ni:Mn의 몰비= 1~1.2:0.4~0.7:0.2~0.5:0.1~0.3에 따라, LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3 중의 2종 이상의 전구체 초기 소결물을 볼밀로 회전속도 500rpm에서 60분간 균일하게 혼합한 후, 다시 직접 박스식 로 안에 넣어 750~980℃의 온도하에서 4~10시간 소결하고, 자연 냉각하여 실온까지 온도를 낮추어 기류분쇄를 진행하며, 기압을 0.4~1.0MPa로 하여 다결정 Co-Ni-Mn 삼원 양극재료를 얻는다;
또는 최종산물 복합 소결법을 사용한다: LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3의 전구체 각각을 직접 박스식 로 안에 넣고, 850~980℃의 온도하에서 5~10시간 소결시키고, 기류분쇄하며, 기압을 0.5MPa로 하고, 샘플 시브로 분급하여 입도 D50=8~20미크론으로 한다. Li:Co:Ni:Mn의 몰비 = 1~1.2:0.4~0.7:0.2~0.5:0.1~0.3에 따라, LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3 중의 2종 이상을 균일하게 혼합하고, 직접 박스식 로 안에 넣고, 350~850 ℃의 온도하에서 0.5~5시간 소결하고 기류분쇄하며, 기압을 0.4~1.0MPa로 하여 다결정 Co-Ni-Mn 삼원 양극재료를 얻는다. - 제2항에 있어서, 상기 Co, Ni, Mn 염류 화합물은 수산기 화합물, 옥살산염 또는 탄산염인 것을 특징으로 하는 다결정 Co-Ni-Mn 삼원 양극재료의 제조방법.
- 제3항에 있어서, 상기 기류분쇄 후에 샘플 시브로 분급하여 입도를 D50 = 8~20 미크론으로 제어하는 것을 특징으로 하는 다결정 Co-Ni-Mn 삼원 양극재료의 제조방법.
- 하기 단계를 포함하는 다결정 Co-Ni-Mn 삼원 양극재료의 제조방법:
1. 전구체의 제조: Co, Ni, Mn의 1종 이상의 총함량이 0.5~1.0mol인 질산염으로 질량농도가 16%인 질산염 수용액을 제조하고, 30~80℃, 회전속도 20~120rpm 의 조건하에서 리튬 원소 함량 1.0~1.2mol, 질량농도 10~25%의 질산리튬 수용액을 점차 적가하고 60~120분간 반응시킨 후, 반응시킨 재료를 직접 박스식 로 안에 넣고 150~250℃의 온도하에서 2~10시간 건조 탈수하고, 회전속도 200~1000rpm의 볼밀로 30분간 분산시킴으로써 LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2 또는 Li2MnO3 (상기 식에서 x, y, x+y<1, z≥1이다)의 산화물 전구체를 얻는다;
2. 다결정 Co-Ni-Mn 삼원 양극재료의 제조는 전구체 복합 소결법을 사용하거나: LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3의 산화물 전구체 2종 이상을 Li:Co:Ni:Mn의 몰비= 1~1.2:0.4~0.7:0.2~0.5:0.1~0.3에 따라, 회전속도 200~1000rpm의 볼밀로 60분간 균일하게 혼합한 후, 혼합물을 직접 박스식 로 안에 넣고 750~950℃의 온도하에서 5~15시간 소결하고 자연 냉각하여 실온까지 온도를 낮추고 기류분쇄를 진행하며, 기압을 0.4~1.0MPa로 하여 다결정 Co-Ni-Mn 삼원 양극재료를 얻는다;
또는 중간체 복합 소결법을 사용하거나: LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3의 전구체 각각을 직접 박스식 로 안에 넣고, 600~850℃의 온도하에서 5~15시간 초기 소결하고, Li:Co:Ni:Mn의 몰비= 1~1.2:0.4~0.7:0.2~0.5:0.1~0.3에 따라, LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3 중의 2종 이상의 전구체 초기 소결물을 볼밀로 회전속도 500rpm에서 60분간 균일하게 혼합한 후, 다시 직접 박스식 로 안에 넣어 750~980℃의 온도하에서 4~10시간 소결하고, 자연 냉각하여 실온까지 온도를 낮추어 기류분쇄를 진행하며, 기압을 0.4~1.0MPa로 하여 다결정 Co-Ni-Mn 삼원 양극재료를 얻는다;
또는 최종산물 복합 소결법을 사용한다: LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3의 전구체 각각을 직접 박스식 로 안에 넣고, 850~980℃의 온도하에서 5~10시간 소결하고, 기류분쇄하며, 기압을 0.5MPa로 하고, 샘플 시브로 분급하여 입도 D50=8~20미크론으로 한다. 그 후 Li:Co:Ni:Mn의 몰비= 1~1.2:0.4~0.7:0.2~0.5:0.1~0.3에 따라, LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3 중의 2종 이상을 균일하게 혼합하고, 직접 박스식 로 안에 넣고 350~850 ℃의 온도하에서 0.5~5시간 소결하고 기류분쇄하며, 기압을 0.4~1.0MPa로 하여 다결정 Co-Ni-Mn 삼원 양극재료를 얻는다. - 제5항에 있어서, 상기 기류분쇄 후에 샘플 시브로 분급하여 입도를 D50 = 8~20 미크론으로 제어하는 것을 특징으로 하는 다결정 Co-Ni-Mn 삼원 양극재료의 제조방법.
- 양극재료를 포함하는 리튬이온 2차전지에 있어서,
상기 양극재료는 LizCoO2, LizNiO2, LizMnO2, LizCo1-(x+y)NixMnyO2, LizNixMn1-xO2, LizCoxNi1-xO2, Li2MnO3 (상기 식에서 x, y, x+y<1, z≥1이다) 중의 2종 이상의 베이스 결정체 구조를 가지며, 다결정 층상 구조이고, 원소 Li:Co:Ni:Mn의 몰비= 1~1.2:0.4~0.7:0.2~0.5:0.1~0.3이고, 입도가 8~20 미크론이며, 압축밀도가 3.9~4.3g/cm3이고, 방전배율이 0.5~1C 일 때 용량이 145mAh/g 이상이며, 300회 순환 용량유지율이 90% 이상인 것을 특징으로 하는 리튬이온 2차전지.
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