콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Scaffold-structured polymer binders for long-term cycle performance of stabilized lithium-powder electrodes
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2020-12
- 저자명 유명현,Dahee Jin,Hyeon-Su Bae,Jinseok Hong,Sojin Kim,Jeounghun Oh,Kyuman Kim,Taejin Jo,Yong Min Lee,Young-Gi Lee
- 학술지명 ELECTROCHIMICA ACTA
- 발행처명 PERGAMON-ELSEVIER SCIENCE LTD
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 10
- 논문 다운로드 링크(외부) https://doi.org/10.1016/j.electacta.2020.136878
- 연구분야 공학 > 화학공학
논문 초록 (Abstract)
Effects of soluble polyimide (PI) binders on large-sized Li anodes (width =21.5 cm; thickness =40 mu m) prepared using Li-metal powder (LiMP) have been investigated. PI binders form a uniform protective layer on exposed Li-powder-coated surfaces, thereby resulting in formation of scaffold-structured LiMP-based anodes. Uniform PI surface films favor realization of Li plating on Li-metal surfaces by forming a smooth surface structure, and the three-dimensional insulating PI matrix functions as a buffer layer that absorbs volume change. Moreover, PI binders facilitate enhanced cohesion between LiMP particles. The above described triple action of PI binders significantly reduces Li dendrites. Consequently, PI-containing LiMPbased metal anodes demonstrate enhanced electrochemical performance compared to both polymeric binders and bare Li-metal foils. Results obtained in this study reveal that LiMP-based anodes containing PI binders exhibit 89% (98.2 mAh g(-)1) discharge-capacity retention during the 200th cycle, whereas bare Li-metal foil demonstrates sudden degeneration during the 65th cycle. Furthermore, PI containing LiMP-based anodes exhibit improved rate capability compared to other polymeric binders considered in this study. (C) 2020 Elsevier Ltd. All rights reserved.
