Pomegranate-like structured Nb 2 O 5 /Carbon@N-doped carbon composites as ultrastable anode for advanced sodium/potassium-ion batteries

The distinctive pomegranate-like Nb O /Carbon@N-doped carbon (Nb O /C@NC) composites are fabricated using hydrothermal method integrated with nitrogen doped carbon coating procedure. For the SIBs anode, the Nb O /C@NC composites present superior rate character and sustainable capacity (117 mAh g upo...

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Published in:Journal of colloid and interface science 2022-05, Vol.613, p.84
Main Authors: Yuan, Jujun, Li, Xiaofan, Liu, Jun, Zuo, Shiyong, Li, Xiaokang, Li, Fangkun, Gan, Yunfei, He, Haishan, Xu, Xijun, Zhang, Xianke, Meng, Junxia
Format: Article
Language:English
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Summary:The distinctive pomegranate-like Nb O /Carbon@N-doped carbon (Nb O /C@NC) composites are fabricated using hydrothermal method integrated with nitrogen doped carbon coating procedure. For the SIBs anode, the Nb O /C@NC composites present superior rate character and sustainable capacity (117 mAh g upon 1000 cycles at 5 A g ). The in-situ X-ray diffraction (XRD) is utilized to research its sodium storage mechanism. Furthermore, for PIBs, the Nb O /C@NC composites present sustainable capacity (81 mAh g upon 1000 cycles at 1 A g ). The outstanding performance of Nb O /C@NC composites is ascribed to its unique architecture, in which Nb O nanocrystals embedded in porous carbon can restrain agglomeration of Nb O nanocrystals, enhance electron/ion diffusion kinetics, and ensure electrolyte accessibility, and moreover, NC shell layer can provide effective active sites and further increase ions/electrons transfer.
ISSN:1095-7103
DOI:10.1016/j.jcis.2022.01.022