KR20220136601A - 산화-환원 반응이 가능한 유기 고분자 전극 첨가제를 포함하는 이차전지 - Google Patents
산화-환원 반응이 가능한 유기 고분자 전극 첨가제를 포함하는 이차전지 Download PDFInfo
- Publication number
- KR20220136601A KR20220136601A KR1020210042440A KR20210042440A KR20220136601A KR 20220136601 A KR20220136601 A KR 20220136601A KR 1020210042440 A KR1020210042440 A KR 1020210042440A KR 20210042440 A KR20210042440 A KR 20210042440A KR 20220136601 A KR20220136601 A KR 20220136601A
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- South Korea
- Prior art keywords
- secondary battery
- electrode
- organic polymer
- polymer additive
- nickel
- Prior art date
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- 239000000654 additive Substances 0.000 title claims abstract description 66
- 230000000996 additive effect Effects 0.000 title claims abstract description 65
- 238000006479 redox reaction Methods 0.000 title claims abstract description 10
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- -1 nickel cobalt aluminum Chemical compound 0.000 claims abstract description 53
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 37
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- 239000000463 material Substances 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
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Abstract
이러한 기존 이차전지의 문제점을 해결하기 위하여 본 발명은 분자 구조 내에 자유 라디칼을 포함하는 고분자 첨가물을 전극 내에 포함시킨다. 이 고분자 첨가물은 자유 라디칼이 있어서 이온 상호 작용에 의하여 산화-환원 반응을 한다. 이 고분자 첨가물을 전극 내에 포함시키면 고속 충전과 고속 방전 특성이 향상되고 전극의 안정성이 향상된다. 전극의 안정성이 향상되면 전극의 수명 특성이 향상된다. 이 고분자 첨가물은 전기화학 반응에 참여하기 때문에 니켈의 실질적 용량을 증가시키고 용매에 녹았을 때 점도를 증가시켜 바인더의 역할을 할 수도 있다.
Description
도 2는 PTMA 첨가제를 첨가하지 않은 LiMn2O4 양극을 사용하여 만든 이차전지의 0.5C와 1C의 전류 밀도에서의 충전-방전 그래프이다.
도 3은 PTMA 첨가제를 첨가한 LiMn2O4 양극을 사용하여 만든 이차전지의 0.5C와 1C의 전류 밀도에서의 충전-방전 그래프이다.
도 4는 PTVE 첨가제를 첨가한 LiNi0.6Mn0.2Co0.2O2 양극을 사용하여 만든 이차전지와 PTVE 첨가제를 첨가하지 않은 LiNi0.6Mn0.2Co0.2O2 양극을 사용하여 만든 이차전지전지의 0.5C의 전류 밀도에서의 충전-방전 그래프이다.
도 5는 PTVE 첨가제를 첨가한 LiNi0.6Mn0.2Co0.2O2 양극을 사용하여 만든 이차전지와 PTVE 첨가제를 첨가하지 않은 LiNi0.6Mn0.2Co0.2O2 양극을 사용하여 만든 이차전지전지의 0.5C의 전류 밀도에서의 수명 특성 그래프이다.
도 6은 PTNB 첨가제를 첨가한 LiNi0.5Mn1.5O4 양극을 사용하여 만든 이차전지와 PTNB 첨가제를 첨가하지 않은 LiNi0.5Mn1.5O4 양극을 사용하여 만든 이차전지전지의 0.5C의 전류 밀도에서의 충전-방전 그래프이다.
도 7은 PTNB 첨가제를 첨가한 LiNi0.5Mn1.5O4 양극을 사용하여 만든 이차전지와 PTNB 첨가제를 첨가하지 않은 LiNi0.5Mn1.5O4 양극을 사용하여 만든 이차전지전지의 0.5C의 전류 밀도에서의 수명 특성 그래프이다.
도 8은 PSS 첨가제를 첨가하지 않은 하드카본 음극을 사용하여 만든 반쪽 이차전지의 전류 밀도에 따른 충전-방전 그래프이다.
도 9는 PSS 첨가제를 첨가하지 않은 하드카본 음극을 사용하여 만든 반쪽 이차전지의 전류 밀도에 따른 율 특성 그래프이다.
도 10은 PSS 첨가제를 첨가한 하드카본 음극을 사용하여 만든 반쪽 이차전지의 전류 밀도에 따른 충전-방전 그래프이다.
도 11은 PSS 첨가제를 첨가한 하드카본 음극을 사용하여 만든 반쪽 이차전지의 전류 밀도에 따른 율 특성 그래프이다.
도 12는 PSS 첨가제를 첨가한 하드카본 음극을 사용하여 만든 반쪽 이차전지와 PSS 첨가제를 첨가하지 않은 하드카본 음극을 사용하여 만든 반쪽 이차전지의 0.5C의 전류 밀도에서의 수명 특성 그래프이다.
도 13은 PTVE를 첨가하지 않은 흑연 음극을 사용하여 만든 이차전지의 전류 밀도에 따른 충전-방전 그래프이다.
도 14는 PTVE를 첨가한 흑연 음극을 사용하여 만든 이차전지의 전류 밀도에 따른 충전-방전 그래프이다.
Claims (11)
- 전극활물질; 바인더; 도전재; 및 분자 구조 내에 자유 라디칼을 포함하고, 전기화학적 산화-환원 반응을 통해 전자를 받아들이거나 내놓을 수 있는 유기 고분자 첨가제;
를 포함하는 이차전지 전극. - 전극활물질; 바인더; 도전재; 및 산소 원자 옆에 자유 라디칼이 붙어 있는 구조를 분자 구조 내에 포함하고, 전기화학적 산화-환원 반응을 통해 전자를 받아들이거나 내놓을 수 있는 유기 고분자 첨가제;
를 포함하는 이차전지 전극. - 제2항에 있어서, 상기 유기 고분자 첨가제가 니트록시드 라디칼을 포함하는 것인 이차전지 전극.
- 제2항에 있어서, 상기 유기 고분자 첨가제가 설포닐옥시 라디칼을 포함하는 것인 이차전지 전극.
- 제2항에 있어서, 상기 유기 고분자 첨가제가 페녹실 라디칼을 포함하는 것인 이차전지 전극.
- 제1항 내지 제5항에 있어서, 상기 유기 고분자 첨가제는 용매에 녹아 점도를 나타냄으로써 바인더의 역할을 할 수 있는 것인 이차전지 전극.
- 제1항 내지 제5항에 있어서, 상기 전극 전체를 100 중량%라 하였을 때, 상기 전극활물질은 45 중량% 내지 99 중량%의 양으로 포함되고, 상기 유기 고분자 첨가제는 45 중량% 내지 0.5 중량%의 양으로 포함되는 이차전지 전극.
- 제7항에 있어서, 상기 전극 전체를 100 중량%라 하였을 때, 상기 전극활물질은 80 중량% 내지 95 중량%의 양으로 포함되고, 상기 유기 고분자 첨가제는 19.5 중량% 내지 2 중량%의 양으로 포함되는 이차전지 전극.
- 제1항 내지 제5항에 있어서, 상기 전극활물질은 리튬 원소를 가지고 있는 산화물, 유황 혼합물, 나트륨 원소를 가지고 있는 산화물, 탄소계, 리튬금속계, 나트륨금속계, 알루미늄금속계, 아연금속계, 공기를 포함하는 탄소 또는 이들의 혼합물인 아차전지 전극.
- 제9항에 있어서, 상기 리튬 원소를 가지고 있는 산화물은 LiMO2 (M=Co, Mn, Ni, Fe 등), LiNixCoyMn1-x-yO2 (x=>0.5, y=<0.2) (NCM), LiNi1-x-yCoxAlyO2 (x=>0.5, y=<0.2) (NCA), 층상구조 화합물, 스피넬 구조 화합물, 및 올리빈 구조 화합물로 이루어진 군에서 선택되는 물질 또는 이들의 혼합물이고, 상기 나트륨 원소를 가지고 있는 산화물은 NaMO2 (M=Co, Mn, Ni, Fe 등), NaM2O4 (M=Co, Mn, Ni, Fe 등), NaMPO4 (M=Co, Mn, Ni, Fe 등), NaNixCoyMn1-x-yO2 (x=>0.5, y=<0.2) (NCM), NaNi1-x-yCoxAlyO2 (x=>0.5, y=<0.2) (NCA), 층상 구조 화합물, 스피넬 구조 화합물, 및 올리빈 구조 화합물로 이루어진 군에서 선택되는 물질 또는 이들의 혼합물인 이차전지 전극.
- 제1항 내지 제5항의 이차전지 전극을 포함하는 이차전지.
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| KR1020210042440A KR20220136601A (ko) | 2021-04-01 | 2021-04-01 | 산화-환원 반응이 가능한 유기 고분자 전극 첨가제를 포함하는 이차전지 |
| PCT/KR2021/004116 WO2022211159A1 (ko) | 2021-04-01 | 2021-04-02 | 산화-환원 반응이 가능한 유기 고분자 전극 첨가제를 포함하는 이차전지 |
| US17/325,250 US12057579B2 (en) | 2021-04-01 | 2021-05-20 | Secondary battery containing an organic polymer electrode additive capable of oxidation-reduction reaction |
| KR1020240056273A KR20240085221A (ko) | 2021-04-01 | 2024-04-26 | 산화-환원 반응이 가능한 유기 고분자 전극 첨가제를 포함하는 이차전지 |
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| CN107565186A (zh) * | 2017-07-17 | 2018-01-09 | 上海工程技术大学 | 一种具备温度自检测能力的电池 |
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| KR20240085221A (ko) | 2024-06-14 |
| WO2022211159A1 (ko) | 2022-10-06 |
| US20220320513A1 (en) | 2022-10-06 |
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