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Porous Activated Carbons Derived from Coffee Waste for Use as Functional Separators in Lithium-Sulfur Batteries

Author

Listed:
  • Jae-Hoon Shin

    (Department of Chemical Engineering, Soongsil University, Seoul 06978, Korea
    These authors contributed equally to this work.)

  • Yu-Yeon Park

    (Department of Chemical Engineering, Soongsil University, Seoul 06978, Korea
    These authors contributed equally to this work.)

  • Sang-Hyun Moon

    (Department of Chemical Engineering, Soongsil University, Seoul 06978, Korea)

  • Ji-Hwan Kim

    (Department of Chemical Engineering, Soongsil University, Seoul 06978, Korea)

  • Jae-Sung Jang

    (Department of Chemical Engineering, Soongsil University, Seoul 06978, Korea)

  • Sung-Beom Kim

    (Department of Chemical Engineering, Soongsil University, Seoul 06978, Korea)

  • Seong-Nam Lee

    (Department of Chemical Engineering, Soongsil University, Seoul 06978, Korea)

  • Kyung-Won Park

    (Department of Chemical Engineering, Soongsil University, Seoul 06978, Korea)

Abstract

A novel approach has been proposed for improving the performance of lithium-sulfur batteries (LSBs) with a carbon-based material as an interlayer between the cathode and separator. With this method, the cross-over of lithium polysulfides (LiPS) to the anode is suppressed, increasing reutilization of the sulfur cathode. In this study, activated carbons (ACs) were prepared using coffee waste as a carbon source and potassium hydroxide (KOH) as an activation agent at various reaction temperatures ranging from 500 to 800 °C. With the rise in heating temperature, the specific surface areas, micro-surface areas, and micro-pore volumes of the AC samples gradually increased. In particular, the AC sample prepared at 800 °C and used as a functional separator for LSB exhibited improved capacity and cycling performance while suppressing the LiPS shuttle effect.

Suggested Citation

  • Jae-Hoon Shin & Yu-Yeon Park & Sang-Hyun Moon & Ji-Hwan Kim & Jae-Sung Jang & Sung-Beom Kim & Seong-Nam Lee & Kyung-Won Park, 2022. "Porous Activated Carbons Derived from Coffee Waste for Use as Functional Separators in Lithium-Sulfur Batteries," Energies, MDPI, vol. 15(21), pages 1-11, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:7961-:d:954608
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