Boosting the sodium storage performance of coal-based carbon materials through structure modification by solvent extraction
Release Time:2020-05-17 Hits:
Indexed by: Journal Papers
Date of Publication: 2020-06-01
Journal: CARBON
Included Journals: SCIE
Volume: 162
Page Number: 431-437
ISSN: 0008-6223
Abstract: High-performance carbon anodes for sodium-ion batteries (SIBs) were synthesized with bituminous coal as precursor through solvent extraction and carbonization. The solvent extraction endows the coal-based carbon a hierarchical pore structure and enlarged interlayer distance, which can shorten the charge diffusion distance, alleviate the volume variation, and improve the ion diffusion rate. As a result, the modified coal-based electrodes exhibit impressive cycling stability (92% capacity retention after 7000th cycle at 2 A g(-1)) and excellent rate capability (79 mA h g(-1) at 10 A g(-1)). (C) 2020 Published by Elsevier Ltd.