KR102270513B1 - 리튬 이차 전지용 양극 조성물, 그리고 이를 포함하는 리튬 이차 전지용 양극 및 리튬 이차 전지 - Google Patents
리튬 이차 전지용 양극 조성물, 그리고 이를 포함하는 리튬 이차 전지용 양극 및 리튬 이차 전지 Download PDFInfo
- Publication number
- KR102270513B1 KR102270513B1 KR1020140100542A KR20140100542A KR102270513B1 KR 102270513 B1 KR102270513 B1 KR 102270513B1 KR 1020140100542 A KR1020140100542 A KR 1020140100542A KR 20140100542 A KR20140100542 A KR 20140100542A KR 102270513 B1 KR102270513 B1 KR 102270513B1
- Authority
- KR
- South Korea
- Prior art keywords
- positive electrode
- lithium
- secondary battery
- conductive material
- lithium secondary
- 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.)
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 68
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000000203 mixture Substances 0.000 title claims abstract description 53
- 239000004020 conductor Substances 0.000 claims abstract description 61
- 239000007774 positive electrode material Substances 0.000 claims abstract description 22
- -1 lithium iron phosphate compound Chemical class 0.000 claims description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 239000011230 binding agent Substances 0.000 claims description 17
- 238000011068 loading method Methods 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 8
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 claims description 4
- 239000006229 carbon black Substances 0.000 claims description 4
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 claims description 4
- 229910002102 lithium manganese oxide Inorganic materials 0.000 claims description 4
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 claims description 4
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 claims description 4
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- QTHKJEYUQSLYTH-UHFFFAOYSA-N [Co]=O.[Ni].[Li] Chemical compound [Co]=O.[Ni].[Li] QTHKJEYUQSLYTH-UHFFFAOYSA-N 0.000 claims description 3
- 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 3
- NDPGDHBNXZOBJS-UHFFFAOYSA-N aluminum lithium cobalt(2+) nickel(2+) oxygen(2-) Chemical compound [Li+].[O--].[O--].[O--].[O--].[Al+3].[Co++].[Ni++] NDPGDHBNXZOBJS-UHFFFAOYSA-N 0.000 claims description 3
- FRMOHNDAXZZWQI-UHFFFAOYSA-N lithium manganese(2+) nickel(2+) oxygen(2-) Chemical compound [O-2].[Mn+2].[Ni+2].[Li+] FRMOHNDAXZZWQI-UHFFFAOYSA-N 0.000 claims description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 18
- 150000001875 compounds Chemical class 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 12
- 239000011572 manganese Substances 0.000 description 12
- 239000010410 layer Substances 0.000 description 9
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 8
- 229910001416 lithium ion Inorganic materials 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
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- 239000011247 coating layer Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 229910052748 manganese Inorganic materials 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- 239000011356 non-aqueous organic solvent Substances 0.000 description 6
- 229910052720 vanadium Inorganic materials 0.000 description 6
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 5
- 239000002033 PVDF binder Substances 0.000 description 5
- 239000003660 carbonate based solvent Substances 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 5
- 238000009830 intercalation Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 229910003002 lithium salt Inorganic materials 0.000 description 5
- 159000000002 lithium salts Chemical class 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000006182 cathode active material Substances 0.000 description 4
- 238000009831 deintercalation Methods 0.000 description 4
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- 238000000034 method Methods 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 229910052712 strontium Inorganic materials 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
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- 229910052719 titanium Inorganic materials 0.000 description 4
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- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
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- KQDOUXAQOUQPQW-UHFFFAOYSA-N 4-bromo-1,3-dioxolan-2-one Chemical compound BrC1COC(=O)O1 KQDOUXAQOUQPQW-UHFFFAOYSA-N 0.000 description 1
- OYOKPDLAMOMTEE-UHFFFAOYSA-N 4-chloro-1,3-dioxolan-2-one Chemical compound ClC1COC(=O)O1 OYOKPDLAMOMTEE-UHFFFAOYSA-N 0.000 description 1
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 description 1
- GPSZQZDENOVTHL-UHFFFAOYSA-N 4-nitro-1,3-dioxolan-2-one Chemical compound [O-][N+](=O)C1COC(=O)O1 GPSZQZDENOVTHL-UHFFFAOYSA-N 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
도 2는 실시예 1에서 제조한 양극에 대한 주사전자현미경(SEM) 사진이다.
도 3은 실시예 1 및 2와 비교예 1에 따른 리튬 이차 전지의 수명 특성을 나타내는 그래프이다.
비교예 1 | 실시예 1 | 실시예 2 | 실시예 3 | ||
전류밀도(mA/cm2) | 2.50 | 2.47 | 2.67 | 2.88 | |
젤리롤 턴 수(turns) | 16 | 16 | 15 | 14 | |
양극 로딩레벨(mg/cm2) | 34.8 | 34.7 | 37.05 | 40.53 | |
양극 활물질 | NCM | NCM | NCM | NCM | |
양극 조성물 | 양극 활물질(중량%) | 94 | 93 | 93 | 93 |
도전재(중량%) | 구형 도전재 3 | 구형 도전재 3 판상형 도전재 1 |
구형 도전재 3 판상형 도전재 1 |
구형 도전재 3 판상형 도전재 1 |
|
바인더(중량%) | 3 | 3 | 3 | 3 | |
양극 평가 | 건조 후 결착력 (gf/mm) | 1.6 | 1.9 | 1.8 | 1.1 |
건조 후 비저항 (mΩ) | 19 | 8.8 | 7.9 | 5.7 | |
극판 품질 | 1) 조립 시 극판의 크랙 및 끊어짐 현상 발생 2) 극판 만곡 심화 |
1) 끊어짐 현상 없음 2) 극판 만곡 경미함 |
1) 끊어짐 현상 없음 2) 극판 만곡 경미함 |
1) 끊어짐 현상 없음 2) 극판 만곡 경미함 |
Claims (13)
- 양극 활물질, 구형 도전재 및 판상형 도전재를 포함하고,
상기 구형 도전재는 상기 판상형 도전재 1 중량부에 대하여 1.1 내지 10 중량부로 포함되며,
상기 구형 도전재는 카본블랙이고,
상기 판상형 도전재는 플레이크 형태의 카본인 리튬 이차 전지용 양극 조성물. - 제1항에서,
상기 구형 도전재는 상기 양극 조성물의 총량에 대하여 1 내지 15 중량%로 포함되는 리튬 이차 전지용 양극 조성물. - 제1항에서,
상기 판상형 도전재는 상기 양극 조성물의 총량에 대하여 0.1 내지 5 중량%로 포함되는 리튬 이차 전지용 양극 조성물. - 삭제
- 제1항에서,
상기 구형 도전재의 평균 입경은 1nm 내지 500nm인 리튬 이차 전지용 양극 조성물. - 삭제
- 제1항에서,
상기 판상형 도전재의 장경은 4㎛ 내지 7㎛인 리튬 이차 전지용 양극 조성물. - 제1항에서,
상기 양극 조성물은 바인더를 더 포함하는 리튬 이차 전지용 양극 조성물. - 제1항에서,
상기 양극 활물질은 리튬망간계 산화물, 리튬니켈계 산화물, 리튬코발트계 산화물, 리튬니켈망간계 산화물, 리튬니켈코발트계 산화물, 리튬니켈코발트망간계 산화물, 리튬니켈코발트알루미늄계 산화물, 리튬인산철계 화합물, 리튬인산망간계 화합물, 리튬인산코발트계 화합물, 리튬인산바나듐계 화합물 또는 이들의 조합을 포함하는 리튬 이차 전지용 양극 조성물. - 제1항 내지 제3항, 제5항 및 제7항 내지 제9항 중 어느 한 항의 양극 조성물
을 포함하는 리튬 이차 전지용 양극. - 제10항에서,
상기 양극의 로딩 레벨은 33 내지 45 mg/cm2 인 리튬 이차 전지용 양극. - 제10항의 양극;
음극; 및
전해액
을 포함하는 리튬 이차 전지. - 제12항에서,
상기 리튬 이차 전지의 전류 밀도는 2 내지 8 mA/cm2인 리튬 이차 전지.
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KR1020140100542A KR102270513B1 (ko) | 2014-08-05 | 2014-08-05 | 리튬 이차 전지용 양극 조성물, 그리고 이를 포함하는 리튬 이차 전지용 양극 및 리튬 이차 전지 |
EP15158352.3A EP2983229A1 (en) | 2014-08-05 | 2015-03-10 | Positive electrode composition for rechargeable lithium battery, and positive electrode for rechargeable lithium battery and rechargeable lithium battery including the same |
CN201510165725.0A CN105322172A (zh) | 2014-08-05 | 2015-04-09 | 可再充电锂电池用的正极组合物、正极和可再充电锂电池 |
US14/726,236 US9627690B2 (en) | 2014-08-05 | 2015-05-29 | Positive electrode composition for rechargeable lithium battery, and positive electrode for rechargeable lithium battery and rechargeable lithium battery including the same |
JP2015154940A JP2016039142A (ja) | 2014-08-05 | 2015-08-05 | リチウム二次電池用正極組成物、リチウム二次電池用正極及びリチウム二次電池 |
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KR102272269B1 (ko) * | 2016-10-10 | 2021-07-02 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 양극 및 이를 포함하는 리튬 이차 전지 |
KR20180060779A (ko) * | 2016-11-29 | 2018-06-07 | 삼성에스디아이 주식회사 | 리튬 이차 전지 |
CN108695487B (zh) * | 2017-04-07 | 2021-09-21 | 宁德时代新能源科技股份有限公司 | 正极片及储能装置 |
KR102093971B1 (ko) * | 2017-06-21 | 2020-05-21 | 주식회사 엘지화학 | 리튬 이차전지 |
JP6952784B2 (ja) * | 2017-09-14 | 2021-10-20 | 株式会社東芝 | 電極及び非水電解質電池 |
KR102591515B1 (ko) | 2018-02-22 | 2023-10-24 | 삼성전자주식회사 | 양극 및 이를 포함하는 리튬전지 |
KR102666367B1 (ko) | 2018-08-28 | 2024-05-20 | 삼성전자주식회사 | 양극 및 이를 포함하는 리튬전지 |
CN113574711A (zh) * | 2019-03-14 | 2021-10-29 | 印度空间研究组织 | 一种制备锂离子电池复合正极的方法 |
CN112467107A (zh) * | 2020-11-25 | 2021-03-09 | 珠海冠宇动力电池有限公司 | 高安全正极片及其锂离子电池 |
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US20160043403A1 (en) | 2016-02-11 |
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EP2983229A1 (en) | 2016-02-10 |
KR20160017364A (ko) | 2016-02-16 |
US9627690B2 (en) | 2017-04-18 |
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