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Graphite Fiber Electrode by Continuous Wet-Spinning
Cited 1 time in
Web of Science
Cited 3 time in Scopus
- Authors
- Issue Date
- 2022-07
- Publisher
- American Chemical Society
- Citation
- ACS Applied Energy Materials, Vol.5 No.7, pp.8963-8972
- Abstract
- © 2022 American Chemical Society. All rights reserved.In this study, we propose a graphite fiber electrode with electrochemical stability and mechanical flexibility for a possible application as wearable batteries. Graphene oxide (GO)-supported graphite fiber electrodes with a uniform diameter of 50 μm and a length of over 50 m are fabricated by a continuous wet-spinning process. GO, which is a thin sheet with 30-50 μm diameter and exhibits a liquid crystal behavior in its dispersion, can enhance the fiber formability and alignment of the graphite during wet-spinning. Scanning electron microscopy visualizes that the graphite plates with approximately 3 μm diameter are firmly wrapped by the GO sheets. A chemical treatment using hydrazine vapor reduces GO in the fiber, which is confirmed by Raman spectroscopy, X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, and electrical conductivity measurement. As a result, we successfully fabricate the rGO/graphite fiber electrode with graphite content as high as 70%. A fiber cell is assembled using the rGO/graphite fiber electrode and lithium wire counter electrode. The fiber cell shows an initial capacity of 265 mA h g-1and maintains excellent capacity retention during 100 cycles except for the capacity loss in the initial cycles.
- ISSN
- 2574-0962
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