Issue 23, 2022

FeF3@C nanotube arrays grown on carbon fabric as a free-standing cathode for lithium-ion batteries

Abstract

A self-supported, free-standing, and carbon-wrapped FeF3@C nanotube array was directly fabricated on carbon fiber cloth (CFC) via in situ deposition and etching using a Ni–Co basic carbonate precursor as a template combined with a facile gas fluorination method. X-ray photoelectron spectroscopy and transmission electron microscopy characterization confirms that FeF3@C-CFC has a uniform nanotube structure, which ensures good infiltration of the electrolyte and provides more pathways for Li+/electron transport, thus achieving superior rate capability. Furthermore, the introduction of carbon not only improves the electronic conductivity but also provides a buffer matrix to protect the nanotube structure from destruction. Due to the unique nanotube array, this FeF3@C-CFC cathode possesses a capacity of over 300 mA h g−1 at 0.1 A g−1 after 700 reciprocating cycles and achieves 235 mA h g−1 at 0.4 A g−1 over 300 cycles. FeF3@C-CFC maintains a specific capacity of 676.7, 563.9, 487, 366.6, 250.5 and 123.4 mA h g−1 at 0.1, 0.2, 0.5, 1.0, 2.0 and 5.0 A g−1, respectively. This design strategy opens a window to free-standing cathode fabrication and will promote the development of flexible Li-ion batteries.

Graphical abstract: FeF3@C nanotube arrays grown on carbon fabric as a free-standing cathode for lithium-ion batteries

Supplementary files

Article information

Article type
Research Article
Submitted
06 sep 2022
Accepted
02 okt 2022
First published
03 okt 2022

Mater. Chem. Front., 2022,6, 3512-3521

FeF3@C nanotube arrays grown on carbon fabric as a free-standing cathode for lithium-ion batteries

X. Xu, F. Li, D. Zhang, S. Ji, Y. Huo and J. Liu, Mater. Chem. Front., 2022, 6, 3512 DOI: 10.1039/D2QM00908K

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