In:
Inorganic Chemistry Frontiers, Royal Society of Chemistry (RSC), Vol. 9, No. 7 ( 2022), p. 1434-1445
Kurzfassung:
Herein, we designed and synthesized carbon nanofiber flexible films with ultrafine V 2 O 3 nanocrystals uniformly dispersed in the skeleton of nanofibers (denoted as V 2 O 3 /CNF). In this structure, the oxygen-bridged (V–O–C) bonds grafted on the inner surface of nanopores in the carbon nanofibers provide abundant exposed electrochemically active sites as well as effectively avoiding the agglomeration of V 2 O 3 nanocrystals to induce volume expansion. Besides, the flexible carbon matrix with porous interconnected channels facilitates the fast transfer of the K + -containing electrolyte and electrons generated in the electrochemical reactions. V 2 O 3 /CNF films with unique structural characteristics deliver a good potassium-storage performance with an outstanding cycling stability (retention of 98% after 2500 cycles at 1 A g −1 ) and excellent rate capacity (175 mA h g −1 at 10 A g −1 ), and the DFT results prove the superiority of V–O–C bonds.
Materialart:
Online-Ressource
ISSN:
2052-1553
Sprache:
Englisch
Verlag:
Royal Society of Chemistry (RSC)
Publikationsdatum:
2022
