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

Jae-Hoon Shin, Yu-Yeon Park, Sang-Hyun Moon, Ji-Hwan Kim, Jae-Sung Jang, Sung-Beom Kim, Seong-Nam Lee and Kyung-Won Park ()
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Jae-Hoon Shin: Department of Chemical Engineering, Soongsil University, Seoul 06978, Korea
Yu-Yeon Park: Department of Chemical Engineering, Soongsil University, Seoul 06978, Korea
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

Energies, 2022, vol. 15, issue 21, 1-11

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.

Keywords: lithium sulfur batteries; separator; coffee waste; activated carbon; shuttle effect; physical adsorption (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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