단일벽 탄소나노튜브를 이용한 리튬이온전지용 실리콘-흑연 기반 복합전극 설계

• Published in: Biuletyn Uniejowski Vol. 57; no. 3; pp. 214 - 220
• Main Authors: 최진영(Jin-young Choi), 최정민(Jeong-min Choi), 이승효(Seung-Hyo Lee), 강준(Jun Kang), 김대욱(Dae-Wook Kim), 김혜민(Hye-Min Kim)
• Format: Journal Article
• Language: Korean
• Published: 한국표면공학회 2024
• Subjects: 기계공학; Lithium-ion batteries; Carbon nanotube; Silicon; 3D network; Composite electrode
• ISSN: 1225-8024; 2299-8403; 2288-8403
• DOI: 10.5695/JSSE.2024.57.3.214

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.