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제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Stretchable components design of lithium-ion battery toward wearable electronics

2019년 2월 14일 15시 24분 08초
ELEC.P-469 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 18일 (목요일) 11:00~12:30
저자 및
Sangyeop Lee, Soojin Park1,*
Division of Advanced Materials Science, Pohang University of Science and Technology, Korea
1Department of Chemistry, Pohang University of Science and Technology, Korea
With the steep progress of wearable electronics such as health care devices, soft electronics, and implantable devices, it is essential to develop energy-storage devices with high stretchability and reasonable electrical performance for powering wearable devices. To achieve the above stretchable energy-storage devices, especially batteries, lots of research have been focused on fabrication of a gel polymer electrolyte (GPE) that substitutes a conventional liquid electrolyte and separator because they can be stretched. However, this GPE suffer from sluggish ionic transport compared with conventional liquid electrolyte systems. Furthermore, they may induce short circuit problem under mechanical deformations. Thus, we propose the poly(styrene-b-butadiene-b-styrene) (SBS)-based stretchable separator, fabricated by using nonsolvent induced phase separation (NIPS) method. This stretchable separator membrane provides facile ion transport channels between two electrodes as well as prevents internal short circuit even under 270% strain. Likewise this separator, stretchable electrode based on conductive fillers/polymer composite, which provides both mechanical robustness (stretching/releasing 1000 cycles) and high electrical conductivity under a strain of 200%, is a core components in the stretchable energy-storage devices in the way. We fabricated the hybrid carbon/polymer (HCP) composite using elastic polymer, carbon nanotubes and carbon black in simple process which can effectively work as a stretchable current collector with providing an efficient electrical pathways. Finally, we achieve stretchable aqueous Li-ion batteries comprising as-prepared stretchable electrode and stretchable separator membrane.