Polymer(Korea) (폴리머)

The Polymer Society of Korea (한국고분자학회)
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A Study on Characterization of Polyethylene Separators Irradiated at Various Electron Beam Current Conditions

다양한 전자선 전류 조건에서 조사된 폴리에틸렌 분리막의 특성 연구

  • Im, Jong-Su (Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Sohn, Joon-Yong (Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Shin, Jun-Hwa (Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Lim, Youn-Mook (Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Choi, Jae-Hak (Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute) ;
  • Kim, Jeong-Soo (Department of Polymer Science and Engineering, Chungnam National University) ;
  • Nho, Young-Chang (Radiation Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute)
  • 임종수 (한국원자력연구원 정읍방사선과학연구소 방사선공업환경연구부) ;
  • 손준용 (한국원자력연구원 정읍방사선과학연구소 방사선공업환경연구부) ;
  • 신준화 (한국원자력연구원 정읍방사선과학연구소 방사선공업환경연구부) ;
  • 임윤묵 (한국원자력연구원 정읍방사선과학연구소 방사선공업환경연구부) ;
  • 최재학 (한국원자력연구원 정읍방사선과학연구소 방사선공업환경연구부) ;
  • 김정수 (충남대학교 고분자공학과) ;
  • 노영창 (한국원자력연구원 정읍방사선과학연구소 방사선공업환경연구부)
  • Published : 2010.01.25
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Abstract

In this paper, crosslinked polyethylene (PE) separators for lithium secondary batteries were prepared by an electron beam irradiation under various beam currents and dose rates. The crosslinking degree increased up to maximum 71% with an increasing absorption dose and with a decreasing beam current. The PE separators irradiated at lower beam currents showed better thermal shrinkage (51%) and mechanical properties than the original PE separator and PE separators irradiated at higher beam current. The ionic conductivity ($1.01{\times}10^{-3}\;S/cm$) and electrolyte uptake (275%) of the crosslinked PE separators were comparable to the original PE separator.

본 연구에서는 다양한 전류조건하에 전자선 조사로 가교된 리튬 이차전지용 폴리에틸렌 분리막을 제조하였다. 제조된 폴리에틸렌 분리막의 가교율은 조사량이 증가할수록 그리고 빔 전류가 낮을수록 증가하여 최대 71%까지 증가하였다. 낮은 빔 전류에서 조사된 폴리에틸렌 분리막은 상용 분리막 보다 우수한 열수축률(51%) 및 기계적 특성을 보여주었다. 가교된 분리막의 이온전도도는 $1.01{\times}10^{-3}\;S/cm$와 전해액 함침률(275%)은 조사되지 않은 분리막과 거의 동일하였다.

Keywords

References

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