Oct, 31, 2024

Vol.57 No.5

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Review

  • The Korean Society of Surface Science and Engineering
  • Volume 57(3); 2024
  • Article

Review

The Korean Society of Surface Science and Engineering 2024;57(3):214-220. Published online: Jul, 8, 2024

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DOI : 10.5695/JSSE.2024.57.3.214

Design of silicon-graphite based composite electrode for lithium-ion batteries using single-walled carbon nanotubes

  • Jin-young Choia, Jeong-min Choib, Seung-Hyo Leec, Jun Kangd, Dae-Wook Kima, Hye-Min Kimd*
    aLow-carbon Energy Group, Ulsan Division, Korea Institute of Industrial Technology, Ulsan 44413, Korea bInterdisciplinary Major of Maritime AI Convergence, Korea Maritime and Ocean University, Busan 49112, Korea cDivision of Ocean Advanced Materials Convergence Engineering, Korea Maritime & Ocean University, Busan 49112, Korea dDivision of Marine System Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
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 Silicon; Composite electrode; Lithium-ion batteries; Carbon nanotube; 3D network.