Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Investigation of direct growth behavior of carbon nanotubes on cathode powder materials in lithium-ion batteries

리튬이차전지 양극 분말 소재 위 탄소나노튜브의 직접 성장 거동 고찰

  • Hyun-Ho Han (Interdisciplinary Program in Advanced Functional Materials and Devices Development, Graduate School of Kangwon National University) ;
  • Jong-Hwan Lee (Interdisciplinary Program in Advanced Functional Materials and Devices Development, Graduate School of Kangwon National University) ;
  • Goo-Hwan Jeong (Interdisciplinary Program in Advanced Functional Materials and Devices Development, Graduate School of Kangwon National University)
  • 한현호 (강원대학교 대학원 고기능 소자 및 소재 기술 고도화 협동과정) ;
  • 이종환 (강원대학교 대학원 고기능 소자 및 소재 기술 고도화 협동과정) ;
  • 정구환 (강원대학교 대학원 고기능 소자 및 소재 기술 고도화 협동과정)
  • Received : 2024.02.13
  • Accepted : 2024.02.21
  • Published : 2024.02.29
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Abstract

This study reports a direct growth of carbon nanotubes (CNTs) on the surface of LiCoO2 (LCO) powders to apply as highly efficient cathode materials in lithium-ion batteries (LIB). The CNT synthesis was performed using a thermal chemical vapor deposition apparatus with temperatures from 575 to 625 ℃. Ferritin molecules as growth catalyst of CNTs were mixed in deionized (DI) water with various concentrations from 0.05 to 1.0 mg/mL. Then, the LCO powders was dissolved in the ferritin solution at a ratio of 1g/mL. To obtain catalytic iron nanoparticles on the LCO surface, the LCO-ferritin suspension was dropped in silicon dioxide substrates and calcined under air at 550℃. Subsequently, the direct growth of CNTs on LCO powders was performed using a mixture of acetylene (10 sccm) and hydrogen (100 sccm) for 10 min. The growth behavior was characterized by scanning and transmission electron microscopy, Raman scattering spectroscopy, X-ray diffraction, and thermogravimetric analysis. The optimized condition yielding high structural quality and amount of CNTs was 600 ℃ and 0.5 mg/mL. The obtained materials will be developed as cathode materials in LIB.

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References

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