The Surface Micro-structures with the Atmospheres in Graphitizing the Carboneous Materials for Rechargeable Batteries and Their Effects on the Cell Performances

이차전지용 탄소재의 흑연화 분위기에 따른 표면미세구조와 전지성능에 미치는 영향

  • Huh, Yoon (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Lee, Jeong-Yong (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology) ;
  • Yoon, Sang-Young (Energy Lab., Corporate R&D Center, Samsung SDI Co. Ltd.)
  • 허윤 (한국과학기술원 재료공학과) ;
  • 이정용 (한국과학기술원 재료공학과) ;
  • 윤상영 ((주)삼성SDI 기술본부 에너지 Lab.)
  • Published : 2000.11.01

Abstract

Amorphous carbons(neddle cokes), which are used as anode materials for lithium ion secondary batteries, were graphitized or heat-treated at high temperature in $N_2$ atmosphere and in Ar atmosphere, after adding $B_2O_3$. After then, using transmission eletron microscopy, their surface micro-structures and the formations and distributions of the second phases were analyzed. It was studied that such analyzed results were related to the cell capacities and efficiencies.

리튬이온이차전지의 부극재로 사용되는 탄소재인 비정질 탄소(needle cokes)에 $B_2O_3$를 첨가하여 공기중의 질소 분위기와 Ar 분위기에서 고온으로 흑연화 열처리를 하였을 때의 표면미세구조의 변화와 제 2상의 분포를 투과전자현미경으로 분석하였다. 또한 전지용량, 전지효율과 같은 전지성능이 탄소재의 표면미세구조와 관련되어 있음을 고찰하였다.

Keywords

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