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High Capacity Electrospun MgFe 2 O 4 –C Composite Nanofibers as an Anode Material for Lithium Ion Batteries
Author(s) -
Narsimulu D.,
Rao B. Nageswara,
Satyanaraya.,
Srinadhu E. S.
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801014
Subject(s) - materials science , anode , electrospinning , faraday efficiency , nanofiber , lithium (medication) , composite number , chemical engineering , carbonization , lithium ion battery , electrochemistry , current density , calcination , nanocrystalline material , composite material , battery (electricity) , nanotechnology , scanning electron microscope , electrode , chemistry , polymer , organic chemistry , medicine , power (physics) , physics , catalysis , engineering , quantum mechanics , endocrinology
MgFe 2 O 4 ‐C composite nanofibers were prepared via electrospinning technique followed by carbonization at 600 °C. Thermogravimetric‐differential thermal analysis (TG‐DTA) results showed ignition, decomposition and carbonization temperatures of the as‐grown fibers. Formation of the nanocrystalline phase of the MgFe 2 O 4 over the amorphous phase of the carbon fibers sample was confirmed from the analysis of the measured XRD results. FE‐SEM images of the as‐spun and calcined fibers sample showed that the formation of one dimensional (1‐D) MgFe 2 O 4 ‐C composite nanofibers and the formed 1‐D nanofibers were well interconnected with high porous structured morphology. The electrochemical properties of the MgFe 2 O 4 ‐C composite nanofibers sample were tested as an anode material for lithium‐ion battery. Lithium‐ion battery made up of the newly developed MgFe 2 O 4 ‐C composite nanofibers sample, used as an anode material, showed discharge capacity of 575 mAh g −1 at a current density of 100 mA g −1 after 20 th cycles. Further, the discharge capacity of the lithium‐ion battery also measured at a high current density of 1 A g −1 and it was found to be 433 mAh g −1 even after 85 cycles. Also, the lithium‐ion battery showed exceptional reversible capacity with the coulombic efficiency of 99.6% even after 85 cycles at a high current density of 1 A g −1 . Hence the electrochemical properties suggest that the newly developed MgFe 2 O 4 ‐C composite nanofibers can be used as high capacity anode materials for lithium‐ion batteries.