KR101214727B1 - 전극, 이의 제조방법, 및 이를 포함하는 전기 화학 캐패시터 - Google Patents
전극, 이의 제조방법, 및 이를 포함하는 전기 화학 캐패시터 Download PDFInfo
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- KR101214727B1 KR101214727B1 KR1020110146363A KR20110146363A KR101214727B1 KR 101214727 B1 KR101214727 B1 KR 101214727B1 KR 1020110146363 A KR1020110146363 A KR 1020110146363A KR 20110146363 A KR20110146363 A KR 20110146363A KR 101214727 B1 KR101214727 B1 KR 101214727B1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/24—Electrodes characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
- H01G11/28—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/32—Carbon-based
- H01G11/38—Carbon pastes or blends; Binders or additives therein
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
본 발명에 따르면, 전극과 집전체 접합부의 바인더 조성과 전극의 활물질 간의 바인더 조성을 차별화시킨 전극을 개발함으로써, 결과적으로 전극의 물리적인 접합력이 크게 향상됨으로서 저저항 특성과 장기신뢰성을 가지는 전기 화학 커패시터를 제조할 수 있다.
Description
도 2는 활물질 입자의 주사전자현미경 사진이고,
도 3은 도전재 입자의 주사전자현미경 사진이고,
도 4는 활물질 조성물 내에서의 각 조성의 분산 형태를 나타낸 구조이고,
도 5와 6은 바인더 조성에 따른 전극에서 발생된 불량의 유형을 나타낸 것이고,
도 7은 본 발명의 일 실시예에 따른 전기이중층 캐패시터의 전극 구조이다.
함량:g | 바인더 | ||
제1전극활물질 조성 | 제2전극활물질 조성 | ||
점 접착형 바인더 |
CMC | 10.0 | 28.0 |
PVP | 4.5 | 0 | |
SBR | 17.0 | 14.5 | |
선 접착형 바인더 | PTFE | 3.0 | 10.5 |
구분 | 접착강도(N/m) |
실시예 | 9.3 |
비교예 | 4.2 |
구분 | 초기용량(F) | 교류저항(mW) |
실시예 | 16.1 | 9.8 |
비교예 | 16.3 | 13.1 |
구분 | 용량(F) | 교류저항(mW) |
실시예 | 15.3(95%) | 11.8(120%) |
비교예 | 13.7(84%) | 22.3(170%) |
22 : 음극 20 : 전극
30 : 전해액 31a, 31b : 전해질 이온
40 : 분리막
51 : 활물질
52 : 도전재
53a : 선 접합용 바인더
53b : 점 접합용 바인더
120a, 120b, 120c, 120d : 전극 활물질층
Claims (11)
- 전극 집전체에 형성된 복수의 전극 활물질층을 포함하며,
상기 각 전극 활물질층은 상이한 구조의 바인더를 포함하는 전극.
- 제1항에 있어서,
상기 바인더 중, 전극 집전체와 접촉되는 전극 활물질층은 점 접착형 바인더를 전체 바인더의 고형분 함량 중 60~95중량%로 포함하고,
전극 활물질층끼리 접촉되는 각 전극 활물질층은 선 접착형 바인더를 전체 바인더의 고형분 함량 중 10~20중량%로 포함하는 것인 전극.
- 제2항에 있어서,
상기 점 접착형 바인더는 스타이렌-부타디엔 고무(SBR), 부타디엔 고무, 아크릴계 고무, 폴리비닐피롤리돈(PVP), 이소프렌 고무, 및 카르복실릭 메틸 셀룰로즈(CMC)로 이루어진 그룹으로부터 선택되는 1종 이상인 전극.
- 제2항에 있어서,
상기 선 접착형 바인더는 폴리테트라플루오로에틸렌(PTFE), 폴리비닐리덴플로라이드(PVDF), 및 폴리비닐포름아마이드(PVFA)로 이루어진 그룹으로부터 선택되는 1종 이상인 전극.
- 점 접착형 바인더를 주성분으로 포함하는 전극 활물질 조성물을 집전체 상에 도포시켜 제1전극 활물질층을 형성하는 단계, 및
상기 제1전극 활물질층 상에 선 접착형 바인더를 포함하는 전극 활물질 조성물을 도포시켜 제2전극 활물질층을 형성하는 단계를 포함하는 전극 제조방법.
- 제5항에 있어서,
상기 제1전극활물질층에 포함되는 점 접착형 바인더는 전체 바인더의 고형분 함량 중 60~95중량%로 포함되는 것인 전극 제조방법.
- 제5항에 있어서,
상기 제2전극활물질층에 포함되는 선 접착형 바인더는 전체 바인더의 고형분 함량 중 10~20중량%로 포함되는 것인 전극 제조방법.
- 제5항에 있어서,
상기 제2전극활물질층 상에 복수의 전극활물질층을 형성하는 단계를 더 포함하는 전극 제조방법.
- 제8항에 있어서,
상기 제2전극활물질층 상에 형성되는 복수의 전극활물질층은 선 접착형 바인더가 전체 바인더의 고형분 함량 중 10~20중량%로 포함되는 전극 활물질 조성물을 도포시켜 형성되는 것인 전극 제조방법.
- 제1항에 따른 전극을 포함하는 전기 화학 캐패시터.
- 제10항에 있어서,
상기 전극은 양극 및 음극 중 어느 하나 또는 모두인 전기 화학 캐패시터.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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KR1020110146363A KR101214727B1 (ko) | 2011-12-29 | 2011-12-29 | 전극, 이의 제조방법, 및 이를 포함하는 전기 화학 캐패시터 |
JP2012284282A JP2013140977A (ja) | 2011-12-29 | 2012-12-27 | 電極、その製造方法、及びこれを含む電気化学キャパシタ |
US13/732,121 US20130170100A1 (en) | 2011-12-29 | 2012-12-31 | Electrode, method for preparing the same, and electrochemical capacitor including the same |
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KR1020110146363A KR101214727B1 (ko) | 2011-12-29 | 2011-12-29 | 전극, 이의 제조방법, 및 이를 포함하는 전기 화학 캐패시터 |
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KR101214727B1 true KR101214727B1 (ko) | 2012-12-21 |
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KR1020110146363A Expired - Fee Related KR101214727B1 (ko) | 2011-12-29 | 2011-12-29 | 전극, 이의 제조방법, 및 이를 포함하는 전기 화학 캐패시터 |
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Cited By (9)
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CN103325991A (zh) * | 2013-05-31 | 2013-09-25 | 余玉英 | 一种全温域锂离子电池 |
KR101442651B1 (ko) * | 2011-03-14 | 2014-09-23 | 주식회사 엘지화학 | 출력 특성과 사이클 특성이 우수한 이차전지용 바인더 |
WO2016175560A1 (ko) * | 2015-04-29 | 2016-11-03 | 주식회사 엘지화학 | 전기화학소자용 전극 및 상기 전극을 제조하는 방법 |
WO2017171409A1 (ko) * | 2016-03-29 | 2017-10-05 | 주식회사 엘지화학 | 이차전지용 음극, 이의 제조방법 및 이를 포함하는 이차전지 |
WO2018048277A3 (ko) * | 2016-09-09 | 2018-05-17 | 주식회사 엘지화학 | 이차전지용 전극의 제조방법 및 이로부터 제조된 전극 |
KR101860755B1 (ko) * | 2016-08-17 | 2018-05-24 | 한국세라믹기술원 | 전기적 안정성이 우수한 울트라커패시터 전극용 조성물, 이를 이용한 울트라커패시터 전극의 제조방법 및 상기 제조방법을 이용하여 제조된 울트라커패시터 |
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JP2001307716A (ja) * | 2000-02-16 | 2001-11-02 | Nisshinbo Ind Inc | 多層電極構造体、それを用いた電池、電気二重層キャパシター及びそれらの製造方法 |
JP4797851B2 (ja) * | 2006-07-19 | 2011-10-19 | 三菱電機株式会社 | 塗布型電極シート、塗布型電極シートの製造方法および塗布型電極シートを用いた電気二重層キャパシタあるいはリチウムイオン電池 |
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2011
- 2011-12-29 KR KR1020110146363A patent/KR101214727B1/ko not_active Expired - Fee Related
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2012
- 2012-12-27 JP JP2012284282A patent/JP2013140977A/ja active Pending
- 2012-12-31 US US13/732,121 patent/US20130170100A1/en not_active Abandoned
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