KR101818627B1 - 축전 소자용 전극, 그것을 사용한 축전 소자, 및 축전 소자용 전극의 제조 방법 - Google Patents
축전 소자용 전극, 그것을 사용한 축전 소자, 및 축전 소자용 전극의 제조 방법 Download PDFInfo
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Abstract
집전체박(集電體箔)(11)과, 집전체박(11) 중 적어도 한쪽의 표면 상에 형성된 활물질층(12)과, 집전체박(11)의 표면 상에 형성되고, 활물질층(12)과 인접하는 고저항층(40)을 가지고, 활물질층(12)과 고저항층(40)과의 계면(50) 중 적어도 일부에는, 2개 층(12, 40)의 조성(組成)을 포함하는 혼합상(混合相)(51)이 형성되어 있는 축전 소자용 전극(10). 활물질층(12)과 고저항층(40)의 계면(50)이 혼합상(51)을 가지는 것에 의해, 인접하는 2개 층(12, 40)의 접합이 견고하게 된다.
Description
도 2는 실험 1의 양극의 단면의 광학 현미경 사진이다.
도 3은 본 발명의 일실시예에 따른 전지의 권취 전극체의 구조를 나타낸 도면이다.
도 4는 본 발명의 일실시예에 따른 전극체 부분의 단면 구조를 나타낸 도면이다.
도 5는 본 발명의 다른 실시예에 따른 전극체 부분의 단면 구조를 나타낸 도면이다.
도 6은 본 발명의 다른 실시예에 따른 양극의 단면을 나타낸 도면이다.
11: 양극 집전체박 12: 양극 활물질층
20: 음극 21: 음극 집전체박
22: 음극 활물질층 25: 음극 끝둘레
30: 세퍼레이터 40: 고저항층
50: 활물질층과 고저항층의 계면
51: 혼합상 52: 혼합상의 최대 두께
121: 양극 활물질층의 벌크 영역
122: 양극 활물질층의 단부 테이퍼 영역
123: 테이퍼 각
Claims (13)
- 집전체박(集電體箔);
상기 집전체박 중 적어도 한쪽의 표면 상에 형성된 활물질층; 및
상기 집전체박의 표면 상에 형성되며, 상기 활물질층과 인접하는 고저항층
을 포함하고,
상기 활물질층과 상기 고저항층과의 계면 중 적어도 일부에는, 상기 활물질층과 상기 고저항층의 2개 층의 조성을 포함하는 혼합상(混合相)이 형성되어 있는, 축전 소자용 전극. - 제1항에 있어서,
상기 혼합상의 최대 두께는, 상기 활물질층에 포함되는 활물질 입자의 입경(粒徑)의 중앙값 이상의 크기인, 축전 소자용 전극. - 제1항 또는 제2항에 있어서,
상기 활물질층의 두께가 상기 고저항층의 두께보다 큰, 축전 소자용 전극. - 제1항 또는 제2항에 있어서,
상기 활물질층은 프레스 가공되어 있고, 상기 고저항층 중 상기 활물질층과 중첩되지 않는 부분은 프레스 가공되어 있지 않은, 축전 소자용 전극. - 제1항 또는 제2항에 있어서,
상기 고저항층은, 상기 활물질층의 단부 테이퍼 영역의 일부와 중첩되며, 또한 상기 활물질층의 벌크(bulk) 영역과는 중첩되지 않는, 축전 소자용 전극. - 제1항 또는 제2항에 있어서,
상기 활물질층은, 두께가 거의 일정한 벌크 영역과, 두께가 점차 감소하는 단부 테이퍼 영역을 가지고,
상기 단부 테이퍼 영역은, 활물질층 끝둘레에 대하여 수직인 단면(斷面)에서의 쐐기 형상의 내각인 테이퍼 각이 80° 이하인, 축전 소자용 전극. - 제6항에 있어서,
상기 테이퍼 각은 45° 이하인, 축전 소자용 전극. - 제1항 또는 제2항에 기재된 축전 소자용 전극으로서의 제1 전극;
상기 제1 전극과는 극성이 상이한 제2 전극; 및
세퍼레이터가 적층된 적층 전극체
를 포함하고,
상기 제2 전극은,
집전체박(集電體箔); 및
상기 집전체박 중 적어도 한쪽의 표면 상에 형성된 활물질층을 포함하는, 축전 소자. - 제8항에 있어서,
상기 제1 전극은 양극인, 축전 소자. - 제9항에 있어서,
비수 전해질을 더 포함하는 축전 소자. - 집전체박을 준비하는 공정;
상기 집전체박의 표면 상에 상기 활물질층을 도포하는 공정; 및
상기 집전체박의 표면 상에 상기 고저항층을 도포하는 공정
을 포함하고,
상기 활물질층과 상기 고저항층 중 나중에 도포되는 층은, 먼저 도포된 층이 건조되기 전에, 상기 먼저 도포된 층에 인접하여 도포되는, 제1항 또는 제2항에 기재된 축전 소자용 전극을 제조하는 방법. - 집전체박을 준비하는 공정;
상기 집전체박의 표면 상에 상기 활물질층을 도포하는 공정; 및
상기 집전체박의 표면 상에 상기 고저항층을 도포하는 공정
을 포함하고,
상기 활물질층과 상기 고저항층 중 나중에 도포되는 층은, 먼저 도포된 층에 인접하여 도포되고, 도포 공정까지의 동안에는, 상기 먼저 도포된 층의 온도가 40℃ 이하에서 실시되는 공정만이 포함되는, 제1항 또는 제2항에 기재된 축전 소자용 전극을 제조하는 방법. - 제11항에 있어서,
상기 활물질층을 도포할 때의 용매와, 상기 고저항층을 도포할 때의 용매가 상용성(相溶性)을 가지는, 축전 소자용 전극을 제조하는 방법.
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| Application Number | Priority Date | Filing Date | Title |
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| JPJP-P-2010-248295 | 2010-11-05 | ||
| JP2010248295 | 2010-11-05 | ||
| JP2011198941A JP5818150B2 (ja) | 2010-11-05 | 2011-09-13 | 蓄電素子用電極、それを用いた蓄電素子、および蓄電素子用電極の製造方法 |
| JPJP-P-2011-198941 | 2011-09-13 |
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| KR20120048508A KR20120048508A (ko) | 2012-05-15 |
| KR101818627B1 true KR101818627B1 (ko) | 2018-01-15 |
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| KR1020110114243A Active KR101818627B1 (ko) | 2010-11-05 | 2011-11-04 | 축전 소자용 전극, 그것을 사용한 축전 소자, 및 축전 소자용 전극의 제조 방법 |
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| US (2) | US8986891B2 (ko) |
| EP (1) | EP2450989B1 (ko) |
| JP (1) | JP5818150B2 (ko) |
| KR (1) | KR101818627B1 (ko) |
| CN (1) | CN102468475B (ko) |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20120048508A (ko) | 2012-05-15 |
| US8986891B2 (en) | 2015-03-24 |
| EP2450989A2 (en) | 2012-05-09 |
| US20120115030A1 (en) | 2012-05-10 |
| CN102468475A (zh) | 2012-05-23 |
| JP5818150B2 (ja) | 2015-11-18 |
| EP2450989A3 (en) | 2014-01-08 |
| US20150132659A1 (en) | 2015-05-14 |
| JP2012114079A (ja) | 2012-06-14 |
| EP2450989B1 (en) | 2017-11-29 |
| CN102468475B (zh) | 2016-05-04 |
| US9450236B2 (en) | 2016-09-20 |
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