Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on the Effects of Multi-Walled Carbon Nanotubes on Electrochemical Performances of Li/S Secondary Batteries

Multi-Walled Carbon Nanotubes가 Li/S 이차전지의 전기화학적 성능에 미치는 영향

  • Song, Min-Sang (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Han, Sang-Cheol (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Hyun-Seok (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Jin-Ho (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kang, Yong-Mook (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Ahn, Hyo-Jun (Department of Metallurgical & Materials Engineering, Gyeongsang National University) ;
  • Lee, Jal-Young (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology)
  • 송민상 (한국과학기술원 재료공학과) ;
  • 한상철 (한국과학기술원 재료공학과) ;
  • 김현석 (한국과학기술원 재료공학과) ;
  • 김진호 (한국과학기술원 재료공학과) ;
  • 강용묵 (한국과학기술원 재료공학과) ;
  • 안효준 (경상대학교 금속재료공학과) ;
  • 이재영 (한국과학기술원 재료공학과)
  • Published : 2003.06.15
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Abstract

Li/S 이차전지의 유황양극의 전기전도도를 향상시키고 유황이 충방전시 전해질내로 용출되는 것을 방지하기 위하여 multi-walled carbon nanotubes (MWNTs)를 thermal CVD 방법으로 제조하여 유황양극에 첨가하였다. 실험결과 첫 사이클에서 Li/S 이차전지의 방전용량은 485mAh/g-sulfur이었고, MWNT 첨가 이후에 유황양극의 cycle life와 rate-capability가 향상되는 것을 관찰할 수 있었다. 그러므로 MWNT는 polysulfide를 유황양극에 흡착시키는 동시에 good electric conductor로서 작용한다는 것을 알 수 있었다.

Keywords

References

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