Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Development of Silicon Coated by Carbon with PVDF Precursor and Its Anode Characteristics for Lithium Batteries

PVDF 전구체를 이용한 탄소 도포 실리콘 재료의 개발 및 리튬이차전지 음극특성

  • 도칠훈 (한국전기연구원 재료응용연구단 전지연구그룹) ;
  • 정기영 (한국전기연구원 재료응용연구단 전지연구그룹) ;
  • 진봉수 (한국전기연구원 재료응용연구단 전지연구그룹) ;
  • 김현수 (한국전기연구원 재료응용연구단 전지연구그룹) ;
  • 문성인 (한국전기연구원 재료응용연구단 전지연구그룹) ;
  • 윤문수 (한국전기연구원 재료응용연구단 전지연구그룹) ;
  • 최임구 ((주)소디프신소재 소재사업부) ;
  • 박철완 ((주)소디프신소재 소재사업부) ;
  • 이경직 ((주)소디프신소재 소재사업부)
  • Published : 2006.07.01
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Abstract

Si-C materials were synthesized by the heating the mixture of silicon and polyvinylidene fluoride (PVDF). The electrochemical properties of the Si-C materials as the high capacitive anode materials of lithium secondary batteries were evaluated by the galvanostatic charge-discharge test through 2032 type $Si-C{\mid}Li$ coin cells. Charge-discharge tests were performed at C/10 hour rate(C = 372 mAh/g). Initial discharge and charge capacities of $Si-C{\mid}Li$ cell using a Si-C material derived from PVDF(20wt.%) were found to be 1,830 and 526 mAh/g respectively. The initial discharge-charge characteristics of the developed Si-C electrode were analyzed by the electrochemical galvanostatic test adopting the capacity limited charge cut-off condition(GISOC). The range of reversible specific capacity IIE(intercalation efficiency at initial discharge-charge) and IICs(surface irreversible specific capacity) were 216 mAh/g, 68 % and 31 mAh/g, respectively.

Keywords

References

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