Nanoflower-Like N-Doped C/CoS2 as High-Performance Anode Materials for Na-Ion Batteries

Pan, Y, Cheng, X, Gong, L, Shi, L and Zhang, H 2018, 'Nanoflower-Like N-Doped C/CoS2 as High-Performance Anode Materials for Na-Ion Batteries', Nanoscale, vol. 10, no. 44, pp. 20813-20820.

Document type: Journal Article
Collection: Journal Articles

Title Nanoflower-Like N-Doped C/CoS2 as High-Performance Anode Materials for Na-Ion Batteries
Author(s) Pan, Y
Cheng, X
Gong, L
Shi, L
Zhang, H
Year 2018
Journal name Nanoscale
Volume number 10
Issue number 44
Start page 20813
End page 20820
Total pages 8
Publisher Royal Society of Chemistry
Abstract Novel N-doped nanoflower-like C/CoS2 spheres assembled from 2D wrinkled CoS2 nanosheets were synthesized through a facile one-pot solvothermal method followed by sulfurization. Ascribed to the optimized 3D nanostructure and rational surface engineering, the unique hierarchical structure of the nanoflower-like C/CoS2 composites showed an excellent sodium ion storage capacity companied with high specific capacity, superior rate performance and long-term cycling stability. Specifically, the conductive interconnected wrinkled nanosheets create a number of mesoporous structures and thus can greatly release the mechanical stresses caused by Na+ insertion/extraction. Besides, it was observed from the experiments that many extra defect vacancies and Na+ storage sites are introduced by nitrogen doping process. It was also observed that the crosslinked 2D nanosheets can effectively reduce the diffusion lengths of sodium ions and electrons, resulting in an outstanding rate performance (>700 mAh g-1 at 1 A g-1 and 458 mAh g-1 at even 10 A g-1) and extraordinarily cycle stability (698 mAh g-1 at 1 A g-1 after 500 cycles). The results provide a facile approach to fabricate promising anode materials for high-performance sodium-ion batteries (SIBs).
Subject Construction Materials
DOI - identifier 10.1039/C8NR06959J
Copyright notice © The Royal Society of Chemistry 2018
ISSN 2040-3372
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