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Novel Terahertz Spectroscopy Analysis for the Electrode with Carbon Nanotubes (CNTs) in Lithium-Ion Batteries

Author

Listed:
  • Jiseong Kim

    (Department of Electric Engineering, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju 61452, Korea
    These authors contributed equally to this work.)

  • Gyeong-Bok Jung

    (Department of Physics Education, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju 61452, Korea
    These authors contributed equally to this work.)

  • Da-Bin Park

    (Department of Electric Engineering, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju 61452, Korea)

  • Minki Jo

    (Department of Electric Engineering, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju 61452, Korea)

  • Nan-Ei Yu

    (Advanced Photonics Research Institute, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea
    Advanced Center for Photon Science Technology, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea)

  • Byungwoo Son

    (Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea)

  • Pilgun Oh

    (Department of Graphic Arts Information Engineering, Pukyong National University, Busan 485471, Korea)

  • Yoonkook Son

    (Department of Electric Engineering, Chosun University, 309, Pilmun-daero, Dong-gu, Gwangju 61452, Korea)

Abstract

In this study, to use carbon nanotubes (CNTs) as a conductive material instead of carbon black in cathode electrodes, their dispersions were prepared in 1-Methyl-2-pyrrolidinone (NMP) solvent by using an ultrasonic horn, and their dispersion stability was analyzed using CNTs on the formation of the network between cathode electrode constituent materials comprised of cathode material, CNTs, and current collectors, and their correlation with electrochemical performance results were investigated using various analytical techniques. Particularly, in the analysis, terahertz time domain spectroscopy (THz-TDS), a new non-destructive analysis method, was used to analyze and compare the various optical properties of the cathode’s slurries that co-existed with CNTs and cathode material, suggesting the suitability of its analytical use in the field of materials dispersion and the slurry manufacturing process for lithium-ion batteries (LIBs). In the investigated results, the sample with the highest dispersion stability of CNTs uniformly formed the networks of CNTs and cathode material in the electrode, which results in the highest electrical conductivity among all samples, and as a result, the best performance in electrochemical evaluations.

Suggested Citation

  • Jiseong Kim & Gyeong-Bok Jung & Da-Bin Park & Minki Jo & Nan-Ei Yu & Byungwoo Son & Pilgun Oh & Yoonkook Son, 2022. "Novel Terahertz Spectroscopy Analysis for the Electrode with Carbon Nanotubes (CNTs) in Lithium-Ion Batteries," Energies, MDPI, vol. 15(7), pages 1-12, April.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:7:p:2665-:d:787396
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