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The Membrane Society of Korea (한국막학회)
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Preparation and Characterization of Microporous PVdF Membrane for Li-ion Rechargeable Battery

이차전지용 미세다공성 PVdF 분리막의 제조와 물성

  • Nam, Sang-Yong (School of Nano and Advanced Materials Engineering, i-Cube Center, Engineering Research Center, Gyeongsang National University) ;
  • Yu, Dae-Hyun (School of Nano and Advanced Materials Engineering, i-Cube Center, Engineering Research Center, Gyeongsang National University) ;
  • Jeong, Mi-Ae (School of Nano and Advanced Materials Engineering, i-Cube Center, Engineering Research Center, Gyeongsang National University) ;
  • Rhim, Ji-Won (Department of Chemical Engineering, Hannam University) ;
  • Byun, Hong-Sik (Department of Chemical System Engineering, Keimyung University) ;
  • Jeong, Chul-Ho (National Research Laboratory for Membranes, School of Chemical Engineering, Hanyang University) ;
  • Lee, Young-Moo (National Research Laboratory for Membranes, School of Chemical Engineering, Hanyang University) ;
  • Seo, Myung-Su (Special Battery Division Research Institute R&D Team, Bexel Corporation)
  • 남상용 (경상대학교 나노신소재공학과, 공학연구원, 아이큐브 사업단) ;
  • 유대현 (경상대학교 나노신소재공학과, 공학연구원, 아이큐브 사업단) ;
  • 정미애 (경상대학교 나노신소재공학과, 공학연구원, 아이큐브 사업단) ;
  • 임지원 (한남대학교 생명.나노 과학대학 나노생명화학공학과) ;
  • 변홍식 (계명대학교 화학시스템공학과) ;
  • 정철호 (한양대학교 공과대학 응용화학공학부 국가지정분리막연구실) ;
  • 이영무 (한양대학교 공과대학 응용화학공학부 국가지정분리막연구실) ;
  • 서명수 ((주)벡셀 특수전지사업부 기술연구소 연구개발팀)
  • Published : 2007.09.30
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Abstract

In this study, a separate. which is a microporous membrane based on poly(vinylidene fluoride)(PVdF) was prepared by phase inversion method. Being prepared by dissolving the PVdF in the N,N'-dimethylformamide(DMF) with mechanical stirring, the homogenous casting solution was cast onto a clean glass plate. Pore size and porosity of the membranes were controlled by changing preparation condition. The highest porosity of the membrane was 78.6%. The mechanical property of the membrane was determined by using an universal testing machine(UTM). The morphology of the membrane was investigated by scanning electron microscopy(SEM). The cross-section of the membrane shows sponge-like small micro-pores.

본 연구에서는 충전용 이차전지의 분리막으로 쓰이는 다공성 막을 기존의 분리막 재료보다 뛰어난 물성을 나타내는 PVdF(poly(vinylidene fluoride))를 사용하여 상전이 방법으로 제조하였다. 용매인 DMF(N,N-dimethylformamide)에 PVdF를 단일상으로 녹인 후 깨끗한 유리판에 캐스팅하여 막을 얻었다. 얻어진 분리막에서 가장 높은 공극률은 78.6%로 얻어졌다. UTM(universal testing machine)을 이용하여 측정된 분리막의 인장강도는 PVdF 20 wt%에서 5.16 MPa의 값을 나타내었다. 시차주사현미경(scanning electron microscopy, SEM)을 이용하여 분리막의 단면 관찰을 통해 다공성을 확인하였다.

Keywords

References

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