Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Design of silicon-graphite based composite electrode for lithium-ion batteries using single-walled carbon nanotubes

단일벽 탄소나노튜브를 이용한 리튬이온전지용 실리콘-흑연 기반 복합전극 설계

  • Jin-young Choi (Low-carbon Energy Group, Ulsan Division, Korea Institute of Industrial Technology) ;
  • Jeong-min Choi (Interdisciplinary Major of Maritime AI Convergence, Korea Maritime and Ocean University) ;
  • Seung-Hyo Lee (Division of Ocean Advanced Materials Convergence Engineering, Korea Maritime & Ocean University) ;
  • Jun Kang (Division of Marine System Engineering, Korea Maritime and Ocean University) ;
  • Dae-Wook Kim (Low-carbon Energy Group, Ulsan Division, Korea Institute of Industrial Technology) ;
  • Hye-Min Kim (Division of Marine System Engineering, Korea Maritime and Ocean University)
  • 최진영 (한국생산기술연구원 울산본부 저탄소에너지그룹) ;
  • 최정민 (한국해양대학교 해양인공지능융합전공) ;
  • 이승효 (한국해양대학교 해양신소재융합공학과) ;
  • 강준 (한국해양대학교 기관시스템공학부) ;
  • 김대욱 (한국생산기술연구원 울산본부 저탄소에너지그룹) ;
  • 김혜민 (한국해양대학교 기관시스템공학부)
  • Received : 2024.04.19
  • Accepted : 2024.05.16
  • Published : 2024.06.30
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Abstract

In this study, three-dimensional (3D) networks structure using single-walled carbon nanotubes (SWCNTs) for Si-graphite composite electrode was developed and studied about effects on the electrochemical performances. To investigate the effect of SWCNTs on forming a conductive 3D network structure electrode, zero-dimensional (0D) carbon black and different SWCNTs composition electrode were compared. It was found that SWCNTs formed a conductive network between nano-Si and graphite particles over the entire area without aggregation. The formation of 3D network structure enabled to effective access for lithium ions leading to improve the c-rate performance, and provided cycle stability by alleviating the Si volume expansion from flexibility and buffer space. The results of this study are expected to be applicable to the electrode design for high-capacity lithium-ion batteries.

Keywords

Acknowledgement

본 논문은 교육부 및 한국연구재단의 4단계 두뇌 한국21 사업(4단계 BK21 사업)으로 지원된 연구임 (창의해양융합인재양성 교육연구단)

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