[논문]Porous carbon microspheres with highly graphitized structure for potassium-ion storage

Choi, Seung Ho; Baucom, Jesse; Li, Xinru; Shen, Li; Seong, Young-Hoon; Han, In Sub; Choi, Yun Ju; Ko, You Na; Kim, Hae Jin; Lu, Yunfeng

doi:10.1016/j.jcis.2020.05.051

[해외논문] Porous carbon microspheres with highly graphitized structure for potassium-ion storage

Journal of colloid and interface science, v.577, 2020년, pp.48 - 53

Choi, Seung Ho (Department of Chemical and Biomolecular Engineering, University of California) , Baucom, Jesse (Department of Chemical and Biomolecular Engineering, University of California) , Li, Xinru (Department of Chemical and Biomolecular Engineering, University of California) , Shen, Li (Department of Chemical and Biomolecular Engineering, University of California) , Seong, Young-Hoon (Energy Materials Laboratory, Korea Institute of Energy Research) , Han, In Sub (Energy Materials Laboratory, Korea Institute of Energy Research) , Choi, Yun Ju (Busan Center, Korea Basic Science Institute) , Ko, You Na (Carbon Conversion Research Laboratory, Korea Institute of Energy Research) , Kim, Hae Jin (Electron Microscopy Research Center, Korea Basic Science Institute) , Lu, Yunfeng (Department of Chemical and Biomolecular Engineering, University of California

Abstract ▼ AI-Helper

Abstract Porous carbon materials are promising candidates for anode materials in rechargeable potassium-ion batteries. However, their high surface area and low crystallinity usually cause side reactions with electrolytes and slanted charge/discharge profiles. Herein, we report the synthesis of porous carbon microspheres with highly graphitized structure and enhanced potassium-ion storage properties. The prepared carbon microspheres exhibit a low working potential of ~0.2 V, high Coulombic efficiency, and a stable reversible capacity of 292.0 mAh/g after 100 cycles, which is significantly higher than that of commercial graphite (137.5 mAh/g after 100 cycles). These desirable performances are attributed to the high crystallinity of carbon and its porous structure, which provide active sites for potassium-ion storage and alleviate the stress caused by the large volume change during the insertion and extraction of potassium ions. Graphical abstract [DISPLAY OMISSION]

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[해외논문] Porous carbon microspheres with highly graphitized structure for potassium-ion storage

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[해외논문] Porous carbon microspheres with highly graphitized structure for potassium-ion storage

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