KR20170121283A - 리튬-이온 배터리용 규소-탄소 복합 애노드 - Google Patents
리튬-이온 배터리용 규소-탄소 복합 애노드 Download PDFInfo
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Abstract
Description
도 1a 및 1b는 Li-이온 배터리의 기본 원리를 도시한 것이다.
도 2는 본 발명에 따른 Si-C 복합 애노드의 리튬치환 및 탈리튬화에 대한 규소 물질의 붕해를 유도하는 리튬치환 및 탈리튬화 동안의 규소 애노드의 팽창을 도시한 것이다.
도 3은 사이클링 실험에 사용된 Hohsen Corp.(Japan)으로부터의 코인-전지(coin-cell)를 도시한 것이다. 타입 2032의 코인-전지 세트는 캔, 가스켓, 상이하게 사이징된 스페이서(differently sized spacer), 와셔(washer) 및 코인-전지 캡(coin-cell cap)으로 구성된다.
도 4는 EIS-데이터를 분석하기 위해 사용된 전형적인 전기 회로를 도시한 것이다.
도 5는 본 발명의 바람직한 구체예에서 상이한 바인더 및 첨가제를 적용함에 의한 단계적 개선사항을 나타낸다.
도 6은 새로운 전극(a) 및 연장된 사이클링 후(b)의 단면도(FIB-SEM으로 작성됨)을 나타낸다.
Claims (15)
- 건조 물질의 총 질량을 기준으로 하여,
40-80 중량%의 규소 입자,
10-45 중량%의, 카본 블랙(carbon black) 및 그라파이트(graphite)로 이루어진 탄소 및
바인더(binder)로서 카복시메틸 셀룰로즈(carboxymethyl cellulose)(CMC)와 스티렌 부타디엔 러버(styrene butadiene rubber)(SBR)의 조합물을 포함하는, 리튬-이온 배터리(lithium-ion battery)용 규소-탄소 복합 애노드(silicon-carbon composite anode). - 제1항에 있어서, 카본 블랙의 양이 5-17.5 중량%이고, 그라파이트의 양이 5-30 중량%인 애노드.
- 제1항 또는 제2항에 있어서, CMC과 SBR를 합한 바인더의 양이 7.5-30 중량%인 애노드.
- 제1항 내지 제3항 중 어느 한 항에 있어서, 건조 물질의 총 질량을 기준으로 하여,
50-70 중량%의 규소 입자,
12.5-17.5 중량%의 카본 블랙,
8.5-20 중량%의 그라파이트, 및
10-17.5 중량%의 바인더로서의 CMC와 SBR의 조합물을 포함하는 애노드. - 제1항 내지 제4항 중 어느 한 항에 있어서, CMC/SBR의 질량비가 0.8:1 내지 1:0.8인 애노드.
- 제1항 내지 제5항 중 어느 한 항에 있어서, 건조 물질의 총 질량을 기준으로 하여,
50-70 중량%의 규소 입자,
12.5-17.5 중량%의 카본 블랙,
8.5-12.5 중량%의 그라파이트, 및
0.9:1 내지 1:0.9의 질량비의 바인더로서의 CMC와 SBR의 조합물을 포함하는 애노드. - 제1항 내지 제6항 중 어느 한 항에 있어서, Si-C 복합 애노드가 집전체로서 금속 호일을 포함하는 애노드.
- 제7항에 있어서, 금속 호일 집전체 상에 증착된 Si-C 복합 물질 층의 두께가 12.5-152.4 ㎛인 애노드.
- 제1항 내지 제8항 중 어느 한 항에 따른 Si-C 복합 애노드의 제조 방법으로서,
- 수성 용매에 CMC 및 SBR 바인더를 제공하는 단계,
- 규소 입자, 카본 블랙 및 그라파이트의 요망하는 양을 칭량하는 단계,
- 상기 양의 규소 입자, 카본 블랙 및 그라파이트를 상기 바인더 용액에 첨가하여 슬러리를 형성시키는 단계,
- 전단 혼합 또는 볼 밀링에 의해 슬러리를 분산시켜 균질한 페이스트(paste)를 형성시키는 단계,
- 집전체 금속 호일 상에 페이스트를 테이프-캐스팅(tape-casting)시키는 단계, 및
- 페이스트화된 필름(pasted film)을 건조시키는 단계를 포함하는 방법. - 제9항에 있어서, 수성 용매가 pH 3의 완충 용액인 방법.
- 제9항 또는 제10항에 있어서, 집전체 금속 호일이 페이스트를 테이프-캐스팅 하기 전에 금속 호일을 자르고, 세정하고, 건조시킴으로써 제조되는 방법.
- 캐소드, 애노드, 집전체, 비수성 액체 전해질 및 분리막을 포함하는 리튬-이온 배터리로서, 애노드가 제1항 내지 제8항 중 어느 한 항에서 정의된 Si-C 복합체인, 리튬-이온 배터리.
- 제12항에 있어서, 전해질이 첨가제로서 플루오로에틸렌 카보네이트(fluoroethylene carbonate)(FEC)를 포함하는, 리튬-이온 배터리.
- 제12항 또는 제13항에 있어서, 1000 mAh/gSi의 용량에서 > 1000 회 사이클을 가능하게 하는, 리튬-이온 배터리.
- 제14항에 있어서, 1000 mAh/gSi의 용량에서 > 1200회 사이클을 가능하게 하는, 리튬-이온 배터리.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20151278A NO20151278A1 (en) | 2015-09-29 | 2015-09-29 | Silicon-carbon composite anode for lithium-ion batteries |
| NO20151278 | 2015-09-29 | ||
| PCT/NO2016/000025 WO2017058024A1 (en) | 2015-09-29 | 2016-09-29 | Silicon-carbon composite anode for lithium-!on batteries |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20170121283A true KR20170121283A (ko) | 2017-11-01 |
| KR102060170B1 KR102060170B1 (ko) | 2019-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020177027775A Active KR102060170B1 (ko) | 2015-09-29 | 2016-09-29 | 리튬-이온 배터리용 규소-탄소 복합 애노드 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US11777079B2 (ko) |
| EP (1) | EP3357114A4 (ko) |
| JP (1) | JP6757900B2 (ko) |
| KR (1) | KR102060170B1 (ko) |
| CN (1) | CN107408669B (ko) |
| CA (1) | CA2975396C (ko) |
| NO (1) | NO20151278A1 (ko) |
| SG (1) | SG11201706381TA (ko) |
| WO (1) | WO2017058024A1 (ko) |
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| KR20200027787A (ko) * | 2018-09-05 | 2020-03-13 | 주식회사 엘지화학 | 음극 및 이를 포함하는 이차전지 |
| KR20200035582A (ko) * | 2018-09-27 | 2020-04-06 | 주식회사 엘지화학 | 리튬 이차전지용 음극의 제조방법 |
| KR20200089568A (ko) * | 2019-01-17 | 2020-07-27 | 주식회사 엘지화학 | 음극 및 이를 포함하는 리튬 이차 전지 |
| KR20240005895A (ko) * | 2022-05-26 | 2024-01-12 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | 음극 시트 및 이의 제조 방법, 이차 전지, 전지 모듈, 전지 팩 및 전기 장치 |
| EP4576253A1 (en) * | 2023-12-22 | 2025-06-25 | LG Energy Solution, Ltd. | Lithium secondary battery |
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Also Published As
| Publication number | Publication date |
|---|---|
| NO20151278A1 (en) | 2017-03-30 |
| JP6757900B2 (ja) | 2020-09-23 |
| CA2975396C (en) | 2019-04-30 |
| US20180040880A1 (en) | 2018-02-08 |
| WO2017058024A1 (en) | 2017-04-06 |
| CN107408669A (zh) | 2017-11-28 |
| WO2017058024A8 (en) | 2017-09-28 |
| CA2975396A1 (en) | 2017-04-06 |
| CN107408669B (zh) | 2020-10-30 |
| US11777079B2 (en) | 2023-10-03 |
| KR102060170B1 (ko) | 2019-12-27 |
| JP2018514067A (ja) | 2018-05-31 |
| EP3357114A1 (en) | 2018-08-08 |
| EP3357114A4 (en) | 2019-05-15 |
| SG11201706381TA (en) | 2017-09-28 |
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