KR101390548B1 - 정 전극판, 전지, 및 정 전극판의 제조 방법 - Google Patents
정 전극판, 전지, 및 정 전극판의 제조 방법 Download PDFInfo
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- KR101390548B1 KR101390548B1 KR1020117030667A KR20117030667A KR101390548B1 KR 101390548 B1 KR101390548 B1 KR 101390548B1 KR 1020117030667 A KR1020117030667 A KR 1020117030667A KR 20117030667 A KR20117030667 A KR 20117030667A KR 101390548 B1 KR101390548 B1 KR 101390548B1
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- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- H01M4/04—Processes of manufacture in general
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- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
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Abstract
Description
또한, 상술한 정 전극판에서는, 기체와 정극 활물질층 사이에 카본 코트층을 개재시켜 이루어지므로, 기체와 정극 활물질층 사이의 결착력을 확실하게 크게 할 수 있다.
또한, 결착재로서 PEO 및 CMC만을 포함한 정극 활물질층을 구비하는 정 전극판을 사용한 전지는, 결착재로서 PEO만을 포함한 정극 활물질층을 구비하는 정 전극판을 사용한 전지보다도, 그 전지 저항 변화율을 작게 할 수 있는 것을 알 수 있었다. 이것으로부터, 상술한 정 전극판을 전지에 사용하면, 전지 저항의 증가를 억제한 전지로 할 수 있다.
또한, 결착재로서 PEO 및 CMC를 각각 1wt%씩 포함하는 정극 활물질층을 구비하는 정 전극판을 사용한 전지가, CMC만을 포함한 정극 활물질층을 사용한 전지뿐만 아니라, PEO만을 포함한 정극 활물질층을 사용한 전지보다도, 그 전지 저항 변화율을 작게 할 수 있는 것을 알 수 있었다. 이것은, CMC만을 포함한 것에서는 정 전극 활물질 입자의 피복량이 작아, 정극 활물질 입자의 표면이 열화되어 버린다. 반대로, PEO만을 포함한 것에서는 정극 활물질 입자의 피복량이 커지고, 입자의 표면적 중 전지 반응에 관여하는 면적이 좁아져, 전지로서 충방전을 반복하면 정 전극 활물질 입자의 내부가 열화되기 쉽기 때문이라고 생각된다. 이것으로부터, 상술한 정 전극판을 전지에 사용하면, 전지 저항의 증가를 억제한 전지로 할 수 있다.
또한, 카본 코트층에 포함하는 탄소 분체로서는, 예를 들어 아세틸렌 블랙, 퍼니스 블랙, 케첸 블랙 등의 카본 블랙이나, 그라파이트 분말 등을 들 수 있다.
도 2는 제1 실시 형태의 부 전극판의 사시도이다.
도 3은 제1 실시 형태의 정 전극판의 사시도이다.
도 4는 제1 실시 형태의 정 전극판의 확대 단면도(도 3의 A부)이다.
도 5는 제1 실시 형태의 정 전극판의 사시도이다.
도 6은 제1 실시 형태의 정 전극판의 사시도이다.
도 7은 제1 실시 형태의 정 전극판의 정극 활물질층 형성 공정의 설명도이다.
도 8은 제1 실시 형태의 정 전극판의 정극 활물질층 형성 공정의 설명도이다.
도 9는 점도계의 설명도이다.
도 10은 방치 시간의 길이에 따른, 활물질 페이스트의 점도의 변화를 나타내는 그래프이다.
도 11은 제1 실시 형태의 정 전극판의 정극 활물질층 형성 공정의 설명도이다.
도 12는 제1 실시 형태의 정 전극판의 정극 활물질층 형성 공정의 설명도이다.
도 13은 제1 참고 형태에 관한 차량의 설명도이다.
도 14는 제2 참고 형태에 관한 전지 탑재 기기의 설명도이다.
30, 130, 230 : 정 전극판
31, 131, 231 : 정극 활물질층
31P, 131P, 231P : 활물질 페이스트
32A : 제1 결착재(결착재)
32B : 제2 결착재(결착재)
35 : 도전재
36, 236 : 정극 활물질 입자
37 : 카본 코트층
38 : 알루미늄박(기체)
CP : 탄소 분체
400 : 차량
500 : 해머 드릴(전지 탑재 기기)
910 : 필터
Claims (10)
- 알루미늄으로 이루어지는 기체와,
상기 기체에 형성되어 이루어지고, 정극 활물질 입자, 도전재 및 결착재를 포함하는 정극 활물질층을 구비하는 정 전극판이며,
상기 기체와 상기 정극 활물질층 사이에, 탄소 분체를 포함하는 카본 코트층을 개재시켜 이루어지고,
상기 결착재는, 폴리에틸렌옥사이드 및 카르복시메틸셀룰로오스만으로 이루어지고,
상기 정극 활물질층은, 상기 폴리에틸렌옥사이드 및 상기 카르복시메틸셀룰로오스를 각각 1wt%씩 포함하는, 정 전극판. - 삭제
- 삭제
- 삭제
- 삭제
- 제1항에 기재된 정 전극판, 및 구리로 이루어지는 부 전극판용 기체와, 상기 부 전극판용 기체에 형성되어 이루어지고, 그라파이트로 이루어지는 부극 활물질 입자 및 결착재를 포함하는 부극 활물질층과, 상기 부극 활물질층 상에 형성되어 이루어지는 세라믹 코트층을 구비하는 부 전극판을 사용한 전지이며,
이 전지의 충전 상태(SOC)가 0 내지 100%인 범위를, 1C의 전류값으로 정전류 충전 및 정전류 방전에 의해 교대로 2000회씩 반복하는 사이클 시험의 전후에서, 상기 SOC를 30%로 한 상기 전지에 대해 30C의 전류값으로 정전류 방전을 행하고, 방전 개시 후 10초 경과 시점의 전압의 값을 측정하여, 상기 사이클 시험 전후에서의 상기 전지의 저항값을 각각 산출하였을 때,
상기 사이클 시험 후의 상기 저항값을, 상기 사이클 시험 전의 상기 저항값으로 나눈 전지 저항 변화율이, 100 내지 110%의 범위에 있는 특성을 갖고 이루어지는, 전지. - 삭제
- 알루미늄으로 이루어지는 기체와,
상기 기체에 형성되어 이루어지고, 정극 활물질 입자, 도전재 및 결착재를 포함하는 정극 활물질층을 구비하는 정 전극판의 제조 방법이며,
상기 정 전극판은, 상기 기체와 상기 정극 활물질층 사이에, 탄소 분체를 포함하는 카본 코트층을 개재시켜 이루어지고,
상기 결착재는, 폴리에틸렌옥사이드 및 카르복시메틸셀룰로오스만으로 이루어지고,
상기 정극 활물질층은, 상기 폴리에틸렌옥사이드 및 상기 카르복시메틸셀룰로오스를 각각 1wt%씩 포함하며,
상기 정극 활물질 입자, 상기 도전재 및 상기 결착재를 혼련한 활물질 페이스트를, 미리 상기 기체에 형성한 상기 카본 코트층 상에 도포하고 건조시켜, 상기 정극 활물질층을 형성하는 정극 활물질층 형성 공정을 구비하는, 정 전극판의 제조 방법. - 삭제
- 제8항에 있어서, 상기 정극 활물질층 형성 공정에 앞서,
혼련 후의 상기 활물질 페이스트를, 포집 효율 90%가 50㎛ 이하인 필터에 통과시키는 필터 통과 공정을 구비하는, 정 전극판의 제조 방법.
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JP5806508B2 (ja) * | 2010-05-28 | 2015-11-10 | 株式会社半導体エネルギー研究所 | 蓄電装置 |
JP6070661B2 (ja) * | 2014-09-10 | 2017-02-01 | トヨタ自動車株式会社 | 正極合剤、正極、固体電池及びそれらの製造方法 |
CN106229477A (zh) * | 2016-08-12 | 2016-12-14 | 中航锂电(洛阳)有限公司 | 正极活性材料、制备方法及应用 |
KR102258090B1 (ko) * | 2016-09-06 | 2021-05-27 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 전극 및 이를 포함하는 리튬 이차 전지 |
CN107482223B (zh) * | 2017-09-29 | 2021-06-08 | 清华大学 | 锂离子电池电极材料组合物、锂离子电池及其电极浆料的制备方法 |
JP6699689B2 (ja) * | 2018-06-27 | 2020-05-27 | トヨタ自動車株式会社 | 負極の製造方法、負極および非水電解液二次電池 |
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WO2002084764A1 (fr) * | 2001-04-10 | 2002-10-24 | Mitsubishi Materials Corporation | Batterie secondaire polymere ion lithium, son electrode et procede pour synthetiser un compose polymere dans un liant utilise dans une couche d'adhesion de celle-ci |
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