본문 바로가기
  • Home

Comparison of carbon coating and MCMB structures used in graphite anodes for potassium ion batteries

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2024, 34(6), pp.1693-1706
  • DOI : 10.1007/s42823-024-00720-6
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : January 14, 2024
  • Accepted : March 9, 2024
  • Published : July 1, 2024

Huang Ruifeng 1 Xu Chenghao 1 Feng Zuyong 1 He Miao 1 Wen Kunhua 2 Chen Li 2 Liang Tong 3 Xiong Deping 2

1Guangdong University of Technology
2Guangdong University of Technology, Guangzhou
3Jiangxi University of Science and Technology

Accredited

ABSTRACT

This study comprehensively investigates three types of graphite materials as potential anodes for potassium-ion batteries. Natural graphite, artificial carbon-coated graphite, and mesocarbon microbeads (MCMB) are examined for their structural characteristics and electrochemical performances. Structural analyses, including HRTEM, XRD, Raman spectroscopy, and laser particle size measurements, reveal distinct features in each graphite type. XRD spectra confirm that all graphites are composed of pure carbon, with high crystallinity and varying crystal sizes. Raman spectroscopy indicates differences in disorder levels, with artificial carbon-coated graphite exhibiting the highest disorder, attributed to its outer carbon coating. Ex-situ Raman and HRTEM techniques on the electrodes reveal their distinct electrochemical behaviors. MCMB stands out with superior stability and capacity retention during prolonged cycling, attributed to its unique spherical particle structure facilitating potassium-ion diffusion. The study suggests that MCMB holds promise for potassium-ion full batteries. In addition, artificial carbon-coated graphite, despite challenges in hindering potassium-ion diffusion, may find applications in commercial potassium-ion battery anodes with suitable coatings. The research contributes valuable insights into potassium-ion battery anode materials, offering a significant extension to the current understanding of graphite-based electrode performance.

Citation status

* References for papers published after 2022 are currently being built.