Morphological adaptability of graphitic carbon nanofibers to enhance sodium insertion in a diglyme-based electrolyte
Author
Nacimiento-Cobos, Francisco José
Cabello Bermúdez, Marta
Ortiz Jiménez, Gregorio F.
Alcántara, Ricardo
Lavela Cabello, Pedro
Tirado Coello, José Luis
Publisher
Royal Society of ChemistryDate
2019Subject
Baterías de ion sodioMETS:
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Show full item recordAbstract
The recent introduction of glyme-based solvents has opened new opportunities to characterize graphitic
materials as anodes for sodium-ion batteries. We evaluated the electrochemical behaviour of a graphitized
carbon nanofiber for the first time. X-ray diffraction, electron paramagnetic resonance and nuclear
magnetic resonance allowed the sodium insertion mechanism to be untangled, in which the occurrence
of an activation process during the first discharge enhances sodium accessibility to active redox centres at
the interlayer space. Morphological changes observed by electron microscopy could be responsible for
this behaviour. A fully graphitized carbon nanofibers/NaPF6(diglyme)/Na3V2(PO4)3 sodium-ion battery was
tested to probe the reliability of this graphitic nanostructure as a negative electrode.