Reduction of maghemite to magnetite over 304SS, in the presence of silver nanoparticles

Martínez-Mera, Isidoro; Gutiérrez-Wing, C.; Arganis-Juárez, Carlos R.

doi:10.1016/j.surfcoat.2017.05.079

Cited by 13 publications

(1 citation statement)

References 31 publications

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“…Raman characterization was also carried out to the polyacrylonitrile (PAN) precursor before and after the pyrolysis process to observe the presence of the magnetite nanoparticles and identify that magnetite structure was retained after the pyrolysis. The Raman spectrum shows a band at 667 cm -1 correlated with vibration mode A1g of magnetite phase (Fe3O4) [13]. After the thermal treatment, the CMFs with and without Fe3O4 incorporation show two bands at 1350 and 1520 cm -1 associated with amorphous carbon (D) and graphitic carbon (G) of CMFs, respectively [8], [10], [14]- [16].…”

Section: Materials Characterizationmentioning

confidence: 99%

Development of a flexible anode for lithium-ion batteries from electrospun carbon-magnetite composite microfibers

Marquez

Arroyave

Láinez

et al. 2021

Rev.Fac.Ing.Univ.Antioquia

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The development of a binder-free material is gaining ground as a flexible anode in lithium-ion batteries due to the higher specific capacity and possibilities of usage in portable appliances. In this work, magnetite nanoparticles (Fe3O4-NPs) were incorporated into carbon microfibers (CMFs) by electrospinning technique to improve the specific capacity of active material, retaining the high flexibility of the CMFs. The composite active material (CMFs-Fe3O4) was characterized by Raman spectroscopy, Thermogravimetric analyses (TGA), and transmission electron microscopy (TEM) to determine the composition, structure, and morphology of the composite. Electrochemical tests were done to evaluate the performance of the composite material as an anode in lithium-ion batteries. Fe3O4-NPs with particle sizes from 30 to 40 nm were incorporated into CMFs (800 nm), and the TEM images showed a homogeneous distribution of Fe3O4-NPs. The electrochemical tests evidenced that magnetite incorporation increases the specific capacity by 42% on the first cycle and 20% on the 50th cycle. Similarly, the Coulombic efficiency increases by 20% in the composite material.

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