Details

Autor(en) / Beteiligte

• Yuan, Jujun
• Li, Xiaofan
• Liu, Jun
• Zuo, Shiyong
• Li, Xiaokang
• Li, Fangkun
• Gan, Yunfei
• He, Haishan
• Xu, Xijun
• Zhang, Xianke
• Meng, Junxia

Titel

Pomegranate-like structured Nb2O5/Carbon@N-doped carbon composites as ultrastable anode for advanced sodium/potassium-ion batteries

Ist Teil von

• Journal of colloid and interface science, 2022-05, Vol.613, p.84-93

Ort / Verlag

Elsevier Inc

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] The distinctive pomegranate-like Nb2O5/Carbon@N-doped carbon (Nb2O5/C@NC) composites are fabricated using hydrothermal method integrated with nitrogen doped carbon coating procedure. For the SIBs anode, the Nb2O5/C@NC composites present superior rate character and sustainable capacity (117 mAh g−1 upon 1000 cycles at 5 A g−1). The in-situ X-ray diffraction (XRD) is utilized to research its sodium storage mechanism. Furthermore, for PIBs, the Nb2O5/C@NC composites present sustainable capacity (81 mAh g−1 upon 1000 cycles at 1 A g−1). The outstanding performance of Nb2O5/C@NC composites is ascribed to its unique architecture, in which Nb2O5 nanocrystals embedded in porous carbon can restrain agglomeration of Nb2O5 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.