Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Polysilane-Based Ceramics as Anodes in Lithium Ion Batteries

Polysilane계 전구체 고분자를 사용한 리튬 이온 전지 음극재용 무기물의 제조

  • Huh, Tae-Hwan (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Im, Hee-Eun (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Kim, Yong-Seok (School of Chemical Biomolecular Engineering, Cornell University) ;
  • Joo, Yong L. (School of Chemical Biomolecular Engineering, Cornell University) ;
  • Kwark, Young-Je (Department of Organic Materials and Fiber Engineering, Soongsil University)
  • 허태환 (숭실대학교 유기신소재.파이버공학과) ;
  • 임희은 (숭실대학교 유기신소재.파이버공학과) ;
  • 김용석 (코넬대학교 화학공학과) ;
  • 주용락 (코넬대학교 화학공학과) ;
  • 곽영제 (숭실대학교 유기신소재.파이버공학과)
  • Received : 2014.02.20
  • Accepted : 2014.04.08
  • Published : 2014.04.30
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Abstract

Two different polysilanes, poly(methyl(phenyl)silane) (PMPS) and poly(methyl(phenyl)silane-co-methyl(vinyl)silane) (PMPS-co-PMVS), were synthesized as precursor polymers to ceramics as anodes in lithium ion batteries. Upon pyrolysis at $1000^{\circ}C$, the polysilanes yielded ceramics with a Si content of 67-70%. The vinyl group containing PMPS-co-PMVS showed a higher ceramic yield than that containing PMPS due to the thermal crosslinking reactions between the vinyl groups. The ceramic products were characterized using elemental analysis, Fourier transform-infrared spectroscopy, thermogravimetry, X-ray diffractometry, and atomic force microscopy. It was revealed that the ceramics from PMPS-co-PMVS had a higher Si atomic content, had more Si-Si bonds, and a more crystalline structure than those from PMPS. The discharge capacities of the ceramics were less than 200 mAh/g, but they showed excellent cycling performance, maintaining their capacities after 100 charge/discharge cycles.

Keywords

References

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