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




Electrochemistry, Energy conversion, Composite material, Carbon, Iron


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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Author Biographies

Carlos Andrés Velásquez-Márquez, Universidad de Antioquia

CIDEMAT- associated researcher

Ferley Alejandro Vásques-Arroyave, Universidad de Antioquia

CIDEMAT- associated researcher

Mónica Lucía Álvarez-Láinez, Universidad EAFIT

GRID – Full professor

Andrés Felipe Zapata-González, Universidad EAFIT

GRID- associated researcher

Jorge Andrés Calderón-Gutiérrez, Universidad de Antioquia

CIDEMAT- Full professor


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How to Cite

Velásquez-Márquez, C. A. ., Vásques-Arroyave, F. A., Álvarez-Láinez, M. L., Zapata-González, A. F., & Calderón-Gutiérrez, J. A. (2021). Development of a flexible anode for lithium-ion batteries from electrospun carbon-magnetite composite microfibers. Revista Facultad De Ingeniería Universidad De Antioquia, (106), 94–102.