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Semi-coke-based amorphous porous carbon synthesized by a molten salt assisted method for superior lithium storage.
- Source :
- New Journal of Chemistry; 2/14/2023, Vol. 47 Issue 6, p2907-2913, 7p
- Publication Year :
- 2023
-
Abstract
- Amorphous porous carbon with a network structure composed of nanosheets was prepared from semi-coke by a facile molten salt method. The low-melting eutectic salts act as solvents at 600 °C, and the porous carbon was obtained in a liquid reaction environment. Meanwhile, the effects of temperature on morphology and electrochemical performance of the carbon materials were studied. The electrodes exhibit extraordinary electrochemical performance as anodes for lithium-ion batteries and show a high capacity of 539.9 mA h g<superscript>−1</superscript> at 0.2 A g<superscript>−1</superscript> after 150 cycles. Moreover, the medium surface area of carbon nanosheets contributes to the high initial Coulombic efficiency of 72.9%. More importantly, the sample shows an excellent cyclability of 231.1 mA h g<superscript>−1</superscript> at 2 A g<superscript>−1</superscript> after 500 cycles. The superior electrochemical performance can be attributed to the unique structure accelerating the movement of electrons/ions and the permeation of the electrolyte, and the cross-linked network structure shortening the Li<superscript>+</superscript> migration path. This method is simple, environmentally friendly, and has broad application prospects in the preparation of carbon-based anode materials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 47
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 161722055
- Full Text :
- https://doi.org/10.1039/d2nj04719e