Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Analysis on Adhesion Properties of Composite Electrodes for Lithium Secondary Batteries using SAICAS

SAICAS를 이용한 리튬이차전지용 복합전극 결착특성 분석

  • Byun, Seoungwoo (Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST)) ;
  • Roh, Youngjoon (Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST)) ;
  • Jin, Dahee (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Ryou, Myung-Hyun (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Lee, Yong Min (Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST))
  • 변승우 (대구경북과학기술원 에너지공학전공) ;
  • 노영준 (대구경북과학기술원 에너지공학전공) ;
  • 진다희 (한밭대학교 화학생명공학과) ;
  • 유명현 (한밭대학교 화학생명공학과) ;
  • 이용민 (대구경북과학기술원 에너지공학전공)
  • Received : 2018.03.28
  • Accepted : 2018.04.24
  • Published : 2018.05.31
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Abstract

Although the adhesion properties of composite electrodes are important for securing long-term reliability and realizing high energy density of lithium secondary batteries, related research has not been carried out extensively due to the limitation of measurement technology. However, surface and interfacial cutting analysis system(SAICAS), which can measure the adhesion properties while cutting and peeling a coating layer of $1{\sim}1000{\mu}m$ thickness, has been developed and applied for analyzing the adhesion properties of composite electrodes for lithium secondary batteries. Thus, this review presents not only the principle and measurement method of SAICAS but also comparison results between SAICAS and conventional peel test. In addition, application examples of SAICAS are introduced in the study of electrode design optimization, new binder derivation study, and binder distribution in composite electrode. This suggests that SAICAS is an analytical method that can be easily applied to investigate the adhesion properties of composite electrodes for lithium secondary batteries.

복합전극의 결착특성은 리튬이차전지의 장기신뢰성 확보와 고에너지밀도 구현을 위한 중요한 물성임에도 불구하고, 측정 기술의 한계로 관련 연구가 제한적이었다. 하지만, $1{\sim}1000{\mu}m$ 두께의 코팅층을 절삭 및 박리하면서 결착특성을 측정할 수 있는 SAICAS(Surface And Interfacial Cutting Analysis System)란 장비의 출현으로 전극 결착특성 연구가 활발해지고 있다. 따라서, 본 총설에서는 SAICAS를 이용한 복합전극의 결착특성 분석 원리 및 측정 방법뿐만 아니라, Peel Test와 같은 기존 결착특성 분석 방법과 비교함으로써 SAICAS를 이용한 분석 방법의 신뢰성 검증 결과를 제시한다. 또한, 전극 설계의 최적화, 신규 바인더 도출 연구, 복합전극 내 바인더 분포 등의 연구에서 SAICAS가 적용된 사례를 소개한다. 이를 통해 SAICAS를 이용한 분석 방법이 리튬이차전지용 복합전극의 결착특성 분석에 용이하게 적용될 수 있음을 제안한다.

Keywords

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