Cobalt oxide fibres are synthesised via electro-spinning followed by calcination in air at 600 °C. Texture, morphology and surface composition of the fibres, as well as phase of the oxide formed are investigated by means of a combination of characterisation techniques. The electrochemical performance of the electro-spun Co3O4 fibres as anode material in Na-ion rechargeable batteries is evaluated, and the conversion reaction mechanism is investigated by carrying out ex-situ analyses on the cycled electrodes. The formation of the CoO after the first sodiation/desodiation cycle accounts for the cathodic specific capacity lowering from 983 down to 580 mAh g− 1. The high aspect ratio morphology of the fibres is responsible for the high value of initial cathodic specific capacity and the slow capacity fading (after 30 cycles, a cathodic capacity of 407 mAh g− 1 is retained).

Electro-spun Co3O4 anode material for Na-ion rechargeable batteries

Santangelo S
;
Pantò F;Frontera P;Antonucci P;
2017-01-01

Abstract

Cobalt oxide fibres are synthesised via electro-spinning followed by calcination in air at 600 °C. Texture, morphology and surface composition of the fibres, as well as phase of the oxide formed are investigated by means of a combination of characterisation techniques. The electrochemical performance of the electro-spun Co3O4 fibres as anode material in Na-ion rechargeable batteries is evaluated, and the conversion reaction mechanism is investigated by carrying out ex-situ analyses on the cycled electrodes. The formation of the CoO after the first sodiation/desodiation cycle accounts for the cathodic specific capacity lowering from 983 down to 580 mAh g− 1. The high aspect ratio morphology of the fibres is responsible for the high value of initial cathodic specific capacity and the slow capacity fading (after 30 cycles, a cathodic capacity of 407 mAh g− 1 is retained).
2017
COBALT OXIDE, ANODE MATERIAL, SODIUM ION BATTERIES, ELECTROCHEMICAL PERFORMANCE, SPECIFIC CAPACITIES
LITHIUM ION BATTERIES, ION STORAGE, RAMAN
File in questo prodotto:
File Dimensione Formato  
Santangelo_2017_SolidStIonics_Electrospun_editor.pdf

non disponibili

Descrizione: Articolo principale
Tipologia: Versione Editoriale (PDF)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 635.61 kB
Formato Adobe PDF
635.61 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/731
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 22
  • ???jsp.display-item.citation.isi??? 23
social impact