Journal
CHINESE CHEMICAL LETTERS
Volume 31, Issue 1, Pages 217-222Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2019.10.009
Keywords
Carbon; Doping; Anode; Potassium-ion battery; Biomass
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Funding
- Natural Science Foundation of Hunan Province [2017JJ1008]
- National Natural Science Foundation of China [21905086, 51971090]
- Key Research and Development Program of Hunan Province of China [2018GK2031]
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Hard carbon is regarded as promising anode materials for potassium-ion batteries (KIBs) owing to their low price and easy availability. However, the limited rate capability still needs to be improved. Herein, we demonstrate the fabrication of oxygen/sulfur co-doped hard carbon through a facile hydrolyzation-sulfuration process of skimmed cotton. The simultaneous dopants significantly improve potassium ion diffusion rate. When served as the anode for KIBs, this hydrolyzed hard carbon delivered a high reversible capacity (409 mAh/g at 0.1 A/g), superior rate capability (135 mAh/g at 2 A/g) and excellent cyclability (about 120 mAh/g overt 500 cycles at 2 A/g). This work provides a facile strategy to prepare low-cost doped-hard carbon with superior potassium storage property. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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