title: High Performance Full Sodium-Ion Cell Based on a Nanostructured Transition Metal Oxide as Negative Electrode.
abstract: A novel design of a sodium-ion cell is proposed based on the use of nanocrystalline thin films composed of transition metal oxides. X-ray diffraction, Raman spectroscopy and electron microscopy were helpful techniques to unveil the microstructural properties of the pristine nanostructured electrodes. Thus, Raman spectroscopy revealed the presence of amorphous NiO, α-Fe2 O3 (hematite) and γ-Fe2 O3 (maghemite). Also, this technique allowed the calculation of an average particle size of 23.4 Å in the amorphous carbon phase in situ generated on the positive electrode. The full sodium-ion cell performed with a reversible capacity of 100 mA h g(-1) at C/2 with an output voltage of about 1.8 V, corresponding to a specific energy density of about 180 W h kg(-1) . These promising electrochemical performances allow these transition metal thin films obtained by electrochemical deposition to be envisaged as serious competitors for future negative electrodes in sodium-ion batteries.
authors: Inorganic Chemistry Laboratory, University of Cordoba, Campus of Rabanales, Marie Curie Building, Cordoba 14071 (Spain).
authors: María C
authors: MC
authors: López
authors: Inorganic Chemistry Laboratory, University of Cordoba, Campus of Rabanales, Marie Curie Building, Cordoba 14071 (Spain).
authors: María J
authors: MJ
authors: Aragón
authors: Inorganic Chemistry Laboratory, University of Cordoba, Campus of Rabanales, Marie Curie Building, Cordoba 14071 (Spain).
authors: Gregorio F
authors: GF
authors: Ortiz
authors: Inorganic Chemistry Laboratory, University of Cordoba, Campus of Rabanales, Marie Curie Building, Cordoba 14071 (Spain). iq1Lacap@uco.es.
authors: Pedro
authors: P
authors: Lavela
authors: Inorganic Chemistry Laboratory, University of Cordoba, Campus of Rabanales, Marie Curie Building, Cordoba 14071 (Spain).
authors: Ricardo
authors: R
authors: Alcántara
authors: Inorganic Chemistry Laboratory, University of Cordoba, Campus of Rabanales, Marie Curie Building, Cordoba 14071 (Spain).
authors: José L
authors: JL
authors: Tirado
keywords: battery; electrochemistry; intercalations; sodium; thin film