KR102368979B1 - 양극재, 이를 포함하는 양극, 및 상기 양극을 포함하는 리튬 전지 - Google Patents
양극재, 이를 포함하는 양극, 및 상기 양극을 포함하는 리튬 전지 Download PDFInfo
- Publication number
- KR102368979B1 KR102368979B1 KR1020210077613A KR20210077613A KR102368979B1 KR 102368979 B1 KR102368979 B1 KR 102368979B1 KR 1020210077613 A KR1020210077613 A KR 1020210077613A KR 20210077613 A KR20210077613 A KR 20210077613A KR 102368979 B1 KR102368979 B1 KR 102368979B1
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- South Korea
- Prior art keywords
- positive electrode
- cathode
- lithium
- carbon
- lithium battery
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 62
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000010406 cathode material Substances 0.000 title claims abstract description 41
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 43
- 239000011164 primary particle Substances 0.000 claims abstract description 27
- 239000011163 secondary particle Substances 0.000 claims abstract description 14
- 239000007774 positive electrode material Substances 0.000 claims description 78
- 239000007773 negative electrode material Substances 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 13
- 239000003792 electrolyte Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 10
- 229910001416 lithium ion Inorganic materials 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 8
- 230000000996 additive effect Effects 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 229910002102 lithium manganese oxide Inorganic materials 0.000 claims description 5
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 claims description 5
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 claims description 4
- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical compound [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 claims description 4
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- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
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- 239000000843 powder Substances 0.000 claims description 2
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- 230000000052 comparative effect Effects 0.000 description 46
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 10
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- 229920006373 Solef Polymers 0.000 description 4
- BJUPUJPGMIDLOR-UHFFFAOYSA-N [Li+].[O--].[O--].[O--].[Al+3].[Co++] Chemical compound [Li+].[O--].[O--].[O--].[Al+3].[Co++] BJUPUJPGMIDLOR-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
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- 239000010949 copper Substances 0.000 description 4
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 4
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 4
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
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- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- 229910013716 LiNi Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
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- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 description 1
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- RLTFLELMPUMVEH-UHFFFAOYSA-N [Li+].[O--].[O--].[O--].[V+5] Chemical compound [Li+].[O--].[O--].[O--].[V+5] RLTFLELMPUMVEH-UHFFFAOYSA-N 0.000 description 1
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
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Abstract
Description
도 1b는 비교예 1에 따른 양극재를 나타낸 모식도이다.
도 2a 및 도 2b는 실시예 1 및 비교예 1에 따른 양극 표면의 양극재에 대해 투과전자현미경(HR-TEM)을 이용하여 수십 nm 크기까지의 해상도로 관찰한 사진이다.
도 2c 및 도 2d는 실시예 1 및 비교예 1에 따른 양극 표면의 양극재에 대해 투과전자현미경(HR-TEM)을 이용하여 수 nm 크기까지의 해상도로 관찰한 사진이다.
도 3a 및 도 3b는 따른 양극 표면의 양극재에 대해 주사전자현미경(SEM)을 이용하여 수백 nm 크기까지의 해상도로 관찰한 사진이다.
도 4는 실시예 1 및 비교예 1에 따른 양극 표면의 양극재에 대해 전단속도에 따른 점도 변화 특성을 나타낸 그래프이다.
도 5는 일 구현예에 따른 리튬 전지의 분해 사시도이다.
도 6은 일 구현예에 따른 배터리 팩을 개략적으로 나타낸 사시도이다.
도 7은 실시예 3 및 비교예 3에 따른 리튬 전지에 대해 SOC 20%, SOC50%, 및 SOC90%에서 각각 저항을 측정한 그래프이다.
도 8은 실시예 3 및 비교예 3에 따른 리튬 전지에 대해 수명특성을 나타낸 그래프이다.
도 9는 실시예 3 및 비교예 3에 따른 리튬 전지에 대해 60일간 방치한 후에 수명특성을 나타낸 그래프이다.
도 10은 실시예 4 및 비교예 4에 따른 18560셀에 대해 기준성능시험(reference performance test)을 이용하여 수명 특성을 나타낸 그래프이다.
구분 | 점도(cPs) | ||
@전단속도 5/sec |
@전단속도 10/sec | @전단속도 15/sec | |
실시예 1 | 4971 | 4740 | 4464 |
비교예 1 | 4798 | 3273 | 2608 |
구분 | 만곡량(mm) |
실시예 1 | 2.5 |
비교예 1 | 8.0 |
구분 | 결착력(gf/mm) |
실시예 2 | 2.0 |
비교예 2 | 1.1 |
구분 | 방전시 내부저항(mΩ) | ||
@SOC20% | @SOC50% | @SOC90% | |
실시예 3 | 0.87 | 0.75 | 0.75 |
비교예 3 | 0.90 | 0.78 | 0.78 |
구분 | 1회 사이클에서의 방전용량 (mAh) |
400 회 사이클에서의 방전용량 (mAh) |
용량유지율 (%) |
실시예 3 | 175 | 140 | 80 |
비교예 3 | 172 | 120 | 70 |
구분 | 1회 사이클에서의 방전용량 (Ah) | 용량유지율 (%) |
실시예 3 | 88 | 96 |
비교예 3 | 87 | 95 |
구분 | 1회 사이클에서의 방전용량(mAh) |
400회 사이클에서의 방전용량(mAh) |
용량유지율 (%) |
실시예 4 | 175 | 146 | 83 |
비교예 4 | 172 | 128 | 74 |
100:리튬 전지, 112: 음극, 113:세퍼레이터,
114: 양극, 120: 전지 용기, 140: 봉입 부재,
200: 냉각 부재, 300: 하우징, 400: 전지 구조체
Claims (17)
- 양극 활물질; 및
복수의 1차 입자로 이루어진 2차 입자의 탄소재;를 포함하고,
상기 2차 입자의 탄소재는 20개의 1차 입자가 서로 연결된 평균 사슬 길이(average chain length)를 갖고,
상기 1차 입자의 평균 입경이 23nm이고,
상기 양극 활물질은 리튬니켈코발트망간 산화물 및 리튬망간 산화물로부터 선택된 1종 이상을 포함하고,
상기 탄소재의 함량이 양극재 총 중량 대비 3중량% 내지 4중량%이고,
상기 탄소재의 비표면적이 150 m2/g이고,
상기 탄소재의 오일 흡수수(oil absorption number; OAN)가 160ml/100g인 양극재. - 삭제
- 삭제
- 제1항에 있어서, 상기 탄소재가 카본 블랙, 아세틸렌 블랙, 에어로젤(aerogel), 및 덴카 블랙으로부터 선택된 1종 이상을 포함하는 양극재.
- 제1항에 있어서, 상기 양극재가 천연 흑연, 인조 흑연, 카본 블랙, 아세틸렌 블랙, 케첸블랙, 탄소섬유, 금속 분말, 및 금속 섬유로부터 선택된 1종 이상의 첨가제를 추가로 포함하는 양극재.
- 제5항에 있어서, 상기 첨가제의 함량이 상기 양극재 총 중량 대비 0.1중량% 내지 15중량%인 양극재.
- 제1항에 있어서, 상기 양극재가 바인더를 추가로 포함하는 양극재.
- 제7항에 있어서, 상기 바인더의 함량이 상기 양극재 총 중량 대비 0.1중량% 내지 15중량%인 양극재.
- 삭제
- 제1항, 제4항 내지 제8항 중 어느 한 항에 따른 양극재 및 집전체를 포함하는 양극.
- 제10항에 있어서, 상기 양극재의 고형분 함량이 상기 양극 총 중량 대비 65중량% 이상인 양극.
- 제11항에 있어서, 상기 양극재와 상기 집전체 간에 결착력이 1.5gf/mm 이상인 양극.
- 제10항에 있어서, 상기 양극의 비저항(specific resistance)이 12밀리옴(mΩ) 이하인 양극.
- 제1항, 제4항 내지 제8항 중 어느 한 항에 따른 양극재를 포함하는 양극;
음극 활물질을 포함하는 음극; 및
상기 양극 및 음극 사이에 전해질을 포함하는 리튬 전지. - 제14항에 있어서, 상기 음극 활물질이 리튬 이온을 가역적으로 삽입 및 탈리 가능한 물질, 리튬 금속, 또는 리튬과 합금화 가능한 금속물질으로부터 선택된 1종 이상을 포함하는 리튬 전지.
- 제14항에 있어서, 상기 리튬 전지는 2mA/cm2 내지 8mA/cm2의 전류밀도에서 사용되는 리튬 전지.
- 제14항에 있어서, 상기 리튬 전지는 전기차량(electric vehicle, EV)용, 하이브리드차량(hybrid electric vehicle, HEV)용, 또는 플러그인하이브리드차량(plug-in hybrid electric vehicle, PHEV)용인 리튬 전지.
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KR1020210077613A KR102368979B1 (ko) | 2014-08-13 | 2021-06-15 | 양극재, 이를 포함하는 양극, 및 상기 양극을 포함하는 리튬 전지 |
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KR1020140105324A KR20160020237A (ko) | 2014-08-13 | 2014-08-13 | 양극재, 이를 포함하는 양극, 및 상기 양극을 포함하는 리튬 전지 |
KR1020210077613A KR102368979B1 (ko) | 2014-08-13 | 2021-06-15 | 양극재, 이를 포함하는 양극, 및 상기 양극을 포함하는 리튬 전지 |
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EP (1) | EP2985824B1 (ko) |
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KR (2) | KR20160020237A (ko) |
CN (2) | CN113206254B (ko) |
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KR102143953B1 (ko) | 2016-03-24 | 2020-08-12 | 주식회사 엘지화학 | 이차전지의 양극 형성용 조성물 및 이를 이용하여 제조한 이차전지용 양극 및 이차전지 |
JP6483918B2 (ja) * | 2016-04-25 | 2019-03-13 | 日本碍子株式会社 | 正極 |
CN109792076B (zh) * | 2016-09-29 | 2022-03-29 | 株式会社东芝 | 非水电解质电池及电池包 |
CN109997254A (zh) * | 2016-11-22 | 2019-07-09 | 日产自动车株式会社 | 电气设备用负极及使用其的电气设备 |
JP6822369B2 (ja) * | 2017-10-02 | 2021-01-27 | トヨタ自動車株式会社 | 電極板の製造方法 |
WO2019074306A2 (ko) * | 2017-10-11 | 2019-04-18 | 주식회사 엘지화학 | 양극 활물질, 이의 제조방법, 및 이를 포함하는 리튬 이차전지 |
CN109659531A (zh) * | 2018-12-17 | 2019-04-19 | 中科廊坊过程工程研究院 | 一种镍钴铝酸锂复合正极材料及其制备方法和应用 |
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- 2015-08-13 PL PL15180997T patent/PL2985824T3/pl unknown
- 2015-08-13 HU HUE15180997A patent/HUE056469T2/hu unknown
- 2015-08-13 EP EP15180997.7A patent/EP2985824B1/en active Active
- 2015-08-13 CN CN202110479918.9A patent/CN113206254B/zh active Active
- 2015-08-13 CN CN201510497855.4A patent/CN105375032A/zh active Pending
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EP2985824B1 (en) | 2021-06-23 |
EP2985824A1 (en) | 2016-02-17 |
CN105375032A (zh) | 2016-03-02 |
JP7427629B2 (ja) | 2024-02-05 |
HUE056469T2 (hu) | 2022-02-28 |
CN113206254B (zh) | 2025-02-14 |
US20160049643A1 (en) | 2016-02-18 |
KR20160020237A (ko) | 2016-02-23 |
JP2021108305A (ja) | 2021-07-29 |
CN113206254A (zh) | 2021-08-03 |
JP2016042461A (ja) | 2016-03-31 |
KR20210078452A (ko) | 2021-06-28 |
PL2985824T3 (pl) | 2021-11-02 |
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