Centrifugally spun TiO2/C composite fibers prepared from TiS2/PAN precursor fibers as binder-free anodes for LIBS

Jorge Lopez, Ramiro Gonzalez, Jonathan Ayala, Jesus Cantu, Alexandria Castillo, Jason Parsons, Jason Myers, Timothy P. Lodge, Mataz Alcoutlabi

Research output: Contribution to journalArticlepeer-review

Abstract

TiO2/carbon composite-fiber anodes for lithium ion batteries were prepared through the centrifugal spinning of TiS2/polyacrylonitrile (PAN) precursor fibers and subsequent thermal treatment. The TiS2/PAN precursor solutions were prepared by mixing TiS2 nanoparticles (a 2-D layered structure) with PAN in N, N-dimethylformamide (DMF). The thermal treatment of the TiS2 in the centrifugally spun PAN fibers resulted in TiO2/carbon composite fibers. The structure of TiO2 nanoparticles embedded in the carbon-fiber matrix synthesized from the TiS2 starting material may accommodate high amounts of Li ions. The TiO2/C structure may lead to increased specific capacity, improved stability, and enhanced electrochemical performance of the TiO2/C composite electrode after prolonged charge/discharge cycles. The TiO2/C composite-fiber anode delivered discharge and charge capacities at the first cycle of 683 mAhg−1 and 356 mAhg−1, respectively, with a reversible charge capacity of 290 mAhg−1 after 100 cycles at a current density of 100 mAg−1. The TiO2/C composite fibers showed an improvement in the rate performance at higher current densities compared to the graphite anode alone.

Original languageEnglish (US)
Article number109795
JournalJournal of Physics and Chemistry of Solids
Volume149
DOIs
StatePublished - Feb 2021

Bibliographical note

Funding Information:
This research was supported by NSF PREM award under grant No. 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 .

Publisher Copyright:
© 2020 Elsevier Ltd

Keywords

  • Anode
  • Carbon fiber
  • PAN
  • Titanium dioxide
  • Titanium disulfide

Fingerprint Dive into the research topics of 'Centrifugally spun TiO<sub>2</sub>/C composite fibers prepared from TiS<sub>2</sub>/PAN precursor fibers as binder-free anodes for LIBS'. Together they form a unique fingerprint.

Cite this