한국기계가공학회지 (Journal of the Korean Society of Manufacturing Process Engineers)

한국기계가공학회 (The Korean Society of Manufacturing Process Engineers)
권호 표지
DOI QR코드

DOI QR Code

고용량 리튬이온이차전지용 고내열성 분리막 코팅장비 연구

A Study on High Thermal Stable Separator Coating Machine for High-Capacity Lithium Ion Secondary Battery

  • 투고 : 2019.09.30
  • 심사 : 2019.10.31
  • 발행 : 2019.12.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

As the separator becomes thinner, the role of thermal stability becomes more important in ensuring the high capacity of medium- and large-sized lithium-ion secondary batteries. In this study, we researched coating technology to improve the separator's thermal stability. We minimized the coating time by optimizing the design of a vertical two-stage coater that was thin, uniform, and capable of coating on both sides at the same time with a maximum 2㎛ thickness coating layer of fluorinated polymer (PVdF-HFP) on the bare polyethylene (PE) separator, which increased the thermal stability. In addition, during the coating process, a dual-jacket-roll method of drying was developed that increased the drying effectiveness without thermal damage to the separator. We also investigated the thermal stability of the separator manufactured from a coating machine, and studied the battery-applied performance by making a lithium-ion pouch battery.

키워드

참고문헌

  1. Park, S. M., Yu, H. J., Kim, K. H., Kang, Y. C. and Cho, W. I., “Dependence of Thermal and Electrochemical Properties of Ceramic Coated Separators on the Ceramic Particle Size,” Journal of the Korean Electrochemical Society, Vol. 20, No. 2, pp. 27-33, 2017. https://doi.org/10.5229/JKES.2017.20.2.27
  2. Kim, S. W., Seok, J. H., Kim, B. H., Cho, H. M. and Cho, K. Y., “Study on the Thickness Effect of the Separator for Lithium Secondary Batteries,” Journal of the Korean Electrochemical Society, Vol. 17, No. 1, pp. 7-12, 2014. https://doi.org/10.5229/JKES.2014.17.1.7
  3. Lee, J. M., Jeon, H. K., Han, T. Y., Ryou, M. H. and Lee, Y. M., “Nano Ceramic Coating on Polypropylene Separator for Safety-Enhanced Lithium Secondary Battery,” Journal of the Korean Electrochemical Society, Vol. 20, No. 2, pp. 41-48, 2017. https://doi.org/10.5229/JKES.2017.20.2.41
  4. Im, J. S., Sohn, J. Y., Shin, J. H., Kim, J. S. and Nho, Y. C., “The Effect of Solid Content on Silylated-${\gamma}-Al_2O_3$/PVDF-HFP-coated PE Separators for Lithium Secondary Battery,” Journal of Radiation Industry, Vol. 3, No. 3, pp. 205-210, 2009.
  5. Waqas, M., Ali, S., Lv, W., Chen, D., Boateng, B. and He, Weidong., "High-Performance PE-BN/PVDF-HFP Bilayer Separator for Lithium-Ion Batteries," Advanced Materials Interfaces, Vol. 6, 1801330, 2019. https://doi.org/10.1002/admi.201801330
  6. Lee, Y. J., Choi, J. C., Ryou, M. H. and Lee, Y. M., "Polymeric Materials for Lithium-Ion Batteries(Separators and Binders)," Polymer Science and Technology, Vol. 24, No. 6, pp. 603-611, 2013.
  7. Yeo, S. H., Son, H. Y., Seo, M. S., Roh, T. W., Kim, G. C., Kim, H. I. and Lee, H. C., "Fabrication and Evaluation of $Si_3N_4$-coated Organic/inorganic Hybrid Separators for Lithium-ion Batteries," Journal of the Korean Electrochemical Society, Vol. 15, No. 1, pp. 48-53, 2012. https://doi.org/10.5229/JKES.2012.15.1.048