In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2022-01, No. 7 ( 2022-07-07), p. 664-664
Abstract:
Abstract In this research, natural anthracite coal (ATC) originated from Vang Danh - Quang Ninh province in Viet Nam was firstly chemically purified and then calcined in inert gas (Ar) at 800 o C for different periods (t = 2, 3 and 6 h) to remove all the impurities and enrich the carbon content. The purity and graphitized structure of treated coal proved significantly while evaluating its structural parameters (the lateral crystallite size - L a , stacking crystallite height - L c , the average number of layers per carbon crystallite - N average , and the average number of carbon atoms per aromatic lamellae - n) 1, 2 and morphology. After purification step, ATC possesses relatively high carbon content (96.0%) and its impurities were mostly removed. The structure of heat-treated ATC samples is like hard carbon. Besides, its graphene interlayer spacing is larger than that of graphite. These features seem to be potential for application of ATC as negative electrode materials for both Li and Na rechargeable batteries. In batteries testing, using ATC calcined at 800 o C for 3 hours as anode material in lithium half-cell exhibited a quite good specific capacity (170.1 mAh g -1 ), which is much higher than the value obtained for commercial hard carbon (162.2 mAh g -1 ). Moreover, Coulombic efficiency of ATC is almost absolute (99.8%). In sodium half-cell, the sample calcined at 800 o C for 2 hours gave much smaller specific capacity of 130.5 mAh g -1 than hard carbon one (280 mAh g -1 ). Nevertheless, Coulombic efficiency of ATC anode in lithium half-cell and sodium half-cell throughout 100 cycles remained absolutely at 99.6%, while their values for hard carbon anode were 99.9% and 99.7%, respectively. References Abou-Rjeily, J.; Laziz, N. A.; Autret-Lambert, C.; Outzourhit, A.; Sougrati, M.-T.; Ghamouss, F., Towards valorizing natural coals in sodium-ion batteries: impact of coal rank on energy storage. Scientific Reports 2020, 10 (1), 1-10. Manoj, B.; Kunjomana, A., Study of stacking structure of amorphous carbon by X-ray diffraction technique. Int. J. Electrochem. Sci 2012, 7 (4), 3127-34. Acknowledgement This work is supported by Viet Nam National University Ho Chi Minh City (VNUHCM) under grant number B2020-18-06
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2022-017664mtgabs
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2022
detail.hit.zdb_id:
2438749-6
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