콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Mechanical robustness of composite electrode for lithium ion battery: Insight into entanglement crystallinity of polymeric binder
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2020-02
- 저자명 유명현,Byun, S (Byun, Seoungwoo),Choi, J (Choi, Jaecheol),Roh, Y (Roh, Youngjoon),Song, D (Song, Danoh),Lee, YM (Lee, Yong Min)
- 학술지명 ELECTROCHIMICA ACTA
- 발행처명 PERGAMON-ELSEVIER SCIENCE LTD
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 6
- 논문 다운로드 링크(외부) https://doi.org/10.1016/j.electacta.2019.135471
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
To investigate the correlation between the molecular weight of the polymeric binder in Li-ion battery electrodes and their adhesion properties, polyvinylidene fluoride (PVdF) with three different molecular weights of 500,000, 630,000, and 1,000,000 are selected for LiCoO2 electrode fabrication. Using a surface and interfacial cutting analysis system, it is observed that, as the molecular weight of the PVdF increases, the adhesion strength not only in the electrode composite, but also at the electrode/current collector interface increases. This enhancement can be attributed to the increased polymeric chain entanglement and higher crystallinity of PVdF with higher molecular weight, which is confirmed using a microfluidic viscometer and differential scanning calorimeter, respectively. In summary, regardless of slightly higher electrode resistance, the LiCoO2 electrode with a PVdF binder of high molecular weight shows better electrochemical performance during cycling test even at 60 degrees C due to its stable mechanical integrity. (C) 2019 Elsevier Ltd. All rights reserved.
