KR101666872B1 - 양극 활물질 및 이의 제조 방법, 그리고 상기 양극 활물질을 포함하는 리튬 이차 전지 - Google Patents
양극 활물질 및 이의 제조 방법, 그리고 상기 양극 활물질을 포함하는 리튬 이차 전지 Download PDFInfo
- Publication number
- KR101666872B1 KR101666872B1 KR1020130044947A KR20130044947A KR101666872B1 KR 101666872 B1 KR101666872 B1 KR 101666872B1 KR 1020130044947 A KR1020130044947 A KR 1020130044947A KR 20130044947 A KR20130044947 A KR 20130044947A KR 101666872 B1 KR101666872 B1 KR 101666872B1
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- KR
- South Korea
- Prior art keywords
- lithium
- active material
- carbon nanotube
- doping
- based oxide
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- 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.)
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 78
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 239000007774 positive electrode material Substances 0.000 title claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 48
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 41
- 239000006182 cathode active material Substances 0.000 claims abstract description 31
- 238000000576 coating method Methods 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 18
- -1 lithium nickel cobalt aluminum Chemical compound 0.000 claims description 26
- 239000011247 coating layer Substances 0.000 claims description 15
- 239000002048 multi walled nanotube Substances 0.000 claims description 8
- 239000002079 double walled nanotube Substances 0.000 claims description 7
- 239000002109 single walled nanotube Substances 0.000 claims description 7
- 239000008151 electrolyte solution Substances 0.000 claims description 6
- 229910003002 lithium salt Inorganic materials 0.000 claims description 6
- 159000000002 lithium salts Chemical class 0.000 claims description 6
- SOXUFMZTHZXOGC-UHFFFAOYSA-N [Li].[Mn].[Co].[Ni] Chemical compound [Li].[Mn].[Co].[Ni] SOXUFMZTHZXOGC-UHFFFAOYSA-N 0.000 claims description 5
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- ZYXUQEDFWHDILZ-UHFFFAOYSA-N [Ni].[Mn].[Li] Chemical compound [Ni].[Mn].[Li] ZYXUQEDFWHDILZ-UHFFFAOYSA-N 0.000 claims description 4
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 claims description 4
- RSNHXDVSISOZOB-UHFFFAOYSA-N lithium nickel Chemical compound [Li].[Ni] RSNHXDVSISOZOB-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 19
- 239000004020 conductor Substances 0.000 description 12
- 239000011572 manganese Substances 0.000 description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 10
- 150000001875 compounds Chemical class 0.000 description 10
- 229910001416 lithium ion Inorganic materials 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
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- 229910052720 vanadium Inorganic materials 0.000 description 6
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- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 5
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 2
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- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical group 0.000 description 2
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- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 description 2
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- FRMOHNDAXZZWQI-UHFFFAOYSA-N lithium manganese(2+) nickel(2+) oxygen(2-) Chemical compound [O-2].[Mn+2].[Ni+2].[Li+] FRMOHNDAXZZWQI-UHFFFAOYSA-N 0.000 description 1
- 229910000686 lithium vanadium oxide Inorganic materials 0.000 description 1
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- 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
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- 229940057061 mevalonolactone Drugs 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- GHZRKQCHJFHJPX-UHFFFAOYSA-N oxacycloundecan-2-one Chemical compound O=C1CCCCCCCCCO1 GHZRKQCHJFHJPX-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- 229910052699 polonium Inorganic materials 0.000 description 1
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- 230000001737 promoting effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
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- 238000001878 scanning electron micrograph Methods 0.000 description 1
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- 229910052711 selenium Inorganic materials 0.000 description 1
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- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
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- 239000002153 silicon-carbon composite material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical class O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- WMOVHXAZOJBABW-UHFFFAOYSA-N tert-butyl acetate Chemical compound CC(=O)OC(C)(C)C WMOVHXAZOJBABW-UHFFFAOYSA-N 0.000 description 1
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- RBYFNZOIUUXJQD-UHFFFAOYSA-J tetralithium oxalate Chemical compound [Li+].[Li+].[Li+].[Li+].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O RBYFNZOIUUXJQD-UHFFFAOYSA-J 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
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- 239000002733 tin-carbon composite material Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
도 2는 실시예 2에 따른 양극 활물질의 주사전자현미경 사진이다.
CNT 코팅량 (wt%) |
극판 비저항 (Ω·m)) |
용량 효율 (10C/0.2C) |
용량 효율 (20C/0.2C) |
비고 | |
비교예 1 | 0 | 5.2 | 85% | 73% | 도전제 5wt% |
실시예 3 | 1.0 | 5.8 | 86% | 75% | 추가 도전제 X |
실시예 2 | 2.0 | 3.0 | 90% | 77% | 추가 도전제 X |
실시예 1 | 3.0 | 1.2 | 96% | 89% | 추가 도전제 X |
10: 양극
20: 음극
30: 세퍼레이터
40: 전극 조립체
50: 케이스
Claims (11)
- 리튬을 도프 및 탈도프할 수 있는 물질의 표면에 탄소 나노 튜브를 건식 코팅하는 단계를 포함하고,
상기 건식 코팅 단계는 상기 리튬을 도프 및 탈도프할 수 있는 물질 및 상기 탄소 나노 튜브를 다목적 믹서기에 투입하여 혼합하는 공정을 통해 수행되고,
상기 건식 코팅 단계는 10분 내지 15분 동안 수행되며,
상기 탄소 나노 튜브는 상기 리튬을 도프 및 탈도프할 수 있는 물질 100 중량부에 대하여 0.1 중량부 내지 3 중량부 사용되는 것인 리튬 이차 전지용 양극 활물질의 제조 방법. - 삭제
- 삭제
- 삭제
- 제1항에서,
상기 탄소 나노 튜브는 단일벽 탄소나노튜브, 이중벽 탄소나노튜브, 다중벽 탄소나노튜브, 다발형 탄소나노튜브, 또는 이들의 조합인 리튬 이차 전지용 양극 활물질의 제조 방법. - 제1항에서,
상기 리튬을 도프 및 탈도프할 수 있는 물질은 리튬니켈계 산화물, 리튬코발트계 산화물, 리튬니켈망간계 산화물, 리튬니켈코발트망간계 산화물, 리튬니켈코발트알루미늄계 산화물, 리튬인산철계 산화물, 또는 이들의 조합을 포함하는 리튬 이차 전지용 양극 활물질의 제조 방법. - 제1항의 제조 방법에 따라 제조되고,
상기 리튬을 도프 및 탈도프할 수 있는 물질, 및
상기 리튬을 도프 및 탈도프할 수 있는 물질의 표면에 연속적으로 또는 불연속적으로 형성되고 상기 탄소 나노 튜브를 포함하는 코팅층을 포함하고,
상기 코팅층이 형성된 부분의 면적은 상기 리튬을 도프 및 탈도프할 수 있는 물질의 표면적 전체의 60 내지 100 %인
리튬 이차 전지용 양극 활물질. - 제7항에서,
상기 탄소 나노 튜브는 상기 리튬을 도프 및 탈도프할 수 있는 물질 100 중량부에 대하여 0.1 내지 3 중량부 포함되는 것인 리튬 이차 전지용 양극 활물질. - 제7항에서,
상기 탄소 나노 튜브는 단일벽 탄소나노튜브, 이중벽 탄소나노튜브, 다중벽 탄소나노튜브, 다발형 탄소나노튜브, 또는 이들의 조합인 리튬 이차 전지용 양극 활물질. - 제7항에서,
상기 리튬을 도프 및 탈도프할 수 있는 물질은 리튬니켈계 산화물, 리튬코발트계 산화물, 리튬니켈망간계 산화물, 리튬니켈코발트망간계 산화물, 리튬니켈코발트알루미늄계 산화물, 리튬인산철계 산화물, 또는 이들의 조합을 포함하는 리튬 이차 전지용 양극 활물질. - 제7 항 내지 제10항 중 어느 한 항에 따른 양극 활물질을 포함하는 양극,
음극, 및
전해액을 포함하는 리튬 이차 전지.
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US14/071,807 US20140315087A1 (en) | 2013-04-23 | 2013-11-05 | Positive active material, method of preparing the same, and rechargeable lithium battery including the same |
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JP2003272632A (ja) * | 2002-03-15 | 2003-09-26 | Mikuni Color Ltd | 炭素被覆リチウム遷移金属酸化物、2次電池正極材料及び2次電池 |
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JP2007048692A (ja) | 2005-08-12 | 2007-02-22 | Hitachi Vehicle Energy Ltd | リチウム二次電池用正極材料、リチウム二次電池用正極板及びこれを用いたリチウム二次電池 |
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