콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Effects of an integrated separator/electrode assembly on enhanced thermal stability and rate capability of lithium-ion batteries
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2017-05
- 저자명 Seokhyeon Gong, Hyunkyu Jeon, Hoogil Lee, Myung-Hyun Ryou, Yong Min Lee
- 학술지명 ACS applied materials & interfaces
- 발행처명 American Chemical Society
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 5
- 논문 다운로드 링크(외부) https://doi.org/10.1021/acsami.7b00044
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
To improve the rate capability and safety of lithium-ion batteries (LIBs), we developed an integrated separator/electrode by gluing polyethylene (PE) separators and electrodes using a polymeric adhesive (poly(vinylidene fluoride), PVdF). To fabricate thin and uniform polymer coating layers on the substrate, we applied the polymer solution using a spray-coating technique. PVdF was chosen because of its superior mechanical properties and stable electrochemical properties within the voltage range of commercial LIBs. The integrated separator/electrode showed superior thermal stability compared to that of the control PE separators. Although PVdF coating layers partially blocked the porous structures of the PE separators, resulting in reduced ionic conductivity (control PE = 0.666 mS cm–1, PVdF-coated PE = 0.617 mS cm–1), improved interfacial properties between the separators and the electrodes were obtained due to the intimate contact, and the rate capabilities of the LIBs based on integrated separators/electrodes showed 176.6% improvement at the 7 C rate (LIBs based on PVdF-coated and control PE maintained 48.4 and 27.4% of the initial discharge capacity, respectively).
