Journal article
Vanadium Monoxide-Based Free-Standing Nanofiber Hosts for High-Loading Lithium-Sulfur Batteries
ACS applied energy materials, v 4(6), pp 5649-5660
28 Jun 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We report the fabrication of free-standing vanadium monoxide-based carbon nanofiber/sulfur (VO-CNFs/S) cathodes via electrospinning and in situ carbothermal reduction reaction followed by sulfur impregnation using an ultrarapid (<90 s) hybrid solution/melt deposition technique. The assembled Li-S batteries using VO-CNFs/S cathodes delivered a stable capacity of 950 mAh.g(-1) with 97% retention after 200 cycles at a 0.5 C rate with a moderate electrolyte/sulfur ratio of 20 mL.g(-1) of sulfur. Additionally, we develop cathodes with a high sulfur loading of 8.32 mg.cm(-2) that exhibits a stable capacity of 900 mAh.g(-1) after a few cycles with near 100% retention over 100 cycles. These cells correspond to a stable aerial capacity of 7.5 mAh.cm(-2). We integrate our fabrication and electrochemical performance study with fundamental investigations of Li+ diffusion kinetics, in situ visual monitoring of polysulfides, and ex situ post-mortem X-ray photoelectron spectroscopy study to elucidate polysulfide shuttling and polysulfide-host interactions. The unique integration of oxide and nitride groups in this work results in a synergistic effect of strong Lewis acid-base interactions originating from the vacant d-orbitals of the vanadium monoxide phase and improved conductivity originating from the nitrogen doping in CNFs from a polymeric precursor, thus offering active sites for strong polysulfide binding as well as faster reaction kinetics.
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Details
- Title
- Vanadium Monoxide-Based Free-Standing Nanofiber Hosts for High-Loading Lithium-Sulfur Batteries
- Creators
- Rahul Pai - Drexel UniversityVibha Kalra - Drexel University
- Publication Details
- ACS applied energy materials, v 4(6), pp 5649-5660
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 12
- Grant note
- 1804374 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000669533800032
- Scopus ID
- 2-s2.0-85110115809
- Other Identifier
- 991019167429804721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Energy & Fuels
- Materials Science, Multidisciplinary