Centrifugally spun α-Fe2O3/TiO2/carbon composite fibers as anode materials for lithium-ion batteries

Luis Zuniga, Gabriel Gonzalez, Roberto Orrostieta Chavez, Jason C. Myers, Timothy P. Lodge, Mataz Alcoutlabi

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We report results on the electrochemical performance of flexible and binder-free α-Fe2O3/TiO2/carbon composite fiber anodes for lithium-ion batteries (LIBs). The composite fibers were produced via centrifugal spinning and subsequent thermal processing. The fibers were prepared from a precursor solution containing PVP/iron (III) acetylacetonate/titanium (IV) butoxide/ethanol/acetic acid followed by oxidation at 200 °C in air and then carbonization at 550 °C under flowing argon. The morphology and structure of the composite fibers were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). These ternary composite fiber anodes showed an improved electrochemical performance compared to the pristine TiO2/C and α-Fe2O3/C composite fiber electrodes. The α-Fe2O3/TiO2/C composite fibers also showed a superior cycling performance with a specific capacity of 340 mAh g-1 after 100 cycles at a current density of 100 mA g-1, compared to 61 mAh g-1 and 121 mAh g-1 for TiO2/C and α-Fe2O3/C composite electrodes, respectively. The improved electrochemical performance and the simple processing of these metal oxide/carbon composite fibers make them promising candidates for the next generation and cost-effective flexible binder-free anodes for LIBs.

Original languageEnglish (US)
Article number4032
JournalApplied Sciences (Switzerland)
Volume9
Issue number19
DOIs
StatePublished - Oct 1 2019

Bibliographical note

Funding Information:
This research is supported by NSF PREM award DMR-1523577: UTRGV-UMN Partnership for Fostering Innovation by Bridging Excellence in Research and Student Success. Part of this work was carried out in the College of Science and Engineering Characterization Facility, University of Minnesota, which has received capital equipment funding from the NSF through the UMN MRSEC program under Award Number DMR-1420013. This research was partially supported by the USDA, the National Institute of Food and Agriculture, and the Integrating Food Science/Engineering and Education Network (IFSEEN) with award number: 2015-38422-24059.

Keywords

  • Anode
  • Centrifugal spinning
  • Lithium ion battery
  • TiO
  • α-FeO

How much support was provided by MRSEC?

  • Primary

Reporting period for MRSEC

  • Period 6

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