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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 language | English (US) |
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Article number | 109795 |
Journal | Journal of Physics and Chemistry of Solids |
Volume | 149 |
DOIs | |
State | Published - Feb 1 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 .
Keywords
- Anode
- Carbon fiber
- PAN
- Titanium dioxide
- Titanium disulfide
MRSEC Support
- Primary
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Dive into the research topics of 'Centrifugally spun TiO2/C composite fibers prepared from TiS2/PAN precursor fibers as binder-free anodes for LIBS'. Together they form a unique fingerprint.Projects
- 3 Finished
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Partnership for Research and Education in Materials
Lodge, T. (PI)
UNIVERSITY OF TEXAS RIO GRANDE VALLEY, THE NATIONAL SCIENCE FOUNDATION
9/1/15 → 8/31/23
Project: Research project
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University of Minnesota MRSEC (DMR-1420013)
Lodge, T. P. (PI)
11/1/14 → 10/31/20
Project: Research project
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MRSEC IRG-3: Hierarchical Multifunctional Macromolecular Materials
Reineke, T. M. (Coordinator), Bates, F. S. (Senior Investigator), Dorfman, K. (Senior Investigator), Dutcher, C. S. (Senior Investigator), Hillmyer, M. A. (Senior Investigator), Lodge, T. P. (Senior Investigator), Morse, D. C. (Senior Investigator), Siepmann, I. (Senior Investigator), Barreda, L. (Researcher) & Ganewatta, M. S. (Researcher)
11/1/14 → 10/31/20
Project: Research project