2D Materials, volume 7, issue 2, pages 25010
A hydrofluoric acid-free synthesis of 2D vanadium carbide (V2C) MXene for supercapacitor electrodes
Yunfeng Guan
1
,
Song Jiang
1
,
叶聪 Cong Ye
1
,
Jiapei Wang
2
,
ZHIJUN DONG
2
,
Qin Zhang
2
,
G. M. Yuan
2
,
Yanjun Li
2
,
Xuanke Li
3
Publication type: Journal Article
Publication date: 2020-01-27
General Chemistry
Condensed Matter Physics
General Materials Science
Mechanical Engineering
Mechanics of Materials
Abstract
Although theoretical calculations predict vanadium carbide (V2C) MXene may possess superior performances as electrodes of supercapacitors and lithium-ion batteries, a milder synthesis process of high-purity V2C MXene undoubtedly becomes one of the greatest hindrances for extending its applications. Herein, we report a hydrofluoric acid (HF)-free synthesis of 2D V2C MXene by milder etching V2AlC powders in the mixture of lithium fluoride and hydrochloric acid. The etching time plays vital roles on the structure and morphology of V2C MXene. The as-synthesized V2C MXene etched for 120 h displays a uniform multilayered structure and higher purity (>90%). All that matter is it exhibits a maximum specific capacitance of 164 F g−1 at a scan rate of 2 mV s−1, good cycling stability and high specific capacitance retention (~90% after 10 000 cycles at 5 A g−1) in 1 M Na2SO4 electrolyte. Moreover, other fluorides, including potassium fluoride, sodium fluoride and ammonium hydrogen fluoride, are also testified to be effective to obtain highly pure V2C MXene. This work provides the certainty for synthesizing MXenes besides Ti3C2 via a HF-free etching process to beneficially expand their promising application.
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Guan Y. et al. A hydrofluoric acid-free synthesis of 2D vanadium carbide (V2C) MXene for supercapacitor electrodes // 2D Materials. 2020. Vol. 7. No. 2. p. 25010.
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Guan Y., Jiang S., Cong Ye 叶., Wang J., DONG Z., Zhang Q., Yuan G. M., Li Y., Li X. A hydrofluoric acid-free synthesis of 2D vanadium carbide (V2C) MXene for supercapacitor electrodes // 2D Materials. 2020. Vol. 7. No. 2. p. 25010.
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TY - JOUR
DO - 10.1088/2053-1583/ab6706
UR - https://doi.org/10.1088/2053-1583/ab6706
TI - A hydrofluoric acid-free synthesis of 2D vanadium carbide (V2C) MXene for supercapacitor electrodes
T2 - 2D Materials
AU - Guan, Yunfeng
AU - Jiang, Song
AU - Cong Ye, 叶聪
AU - Wang, Jiapei
AU - DONG, ZHIJUN
AU - Zhang, Qin
AU - Yuan, G. M.
AU - Li, Yanjun
AU - Li, Xuanke
PY - 2020
DA - 2020/01/27 00:00:00
PB - IOP Publishing
SP - 25010
IS - 2
VL - 7
SN - 2053-1583
ER -
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@article{2020_Guan,
author = {Yunfeng Guan and Song Jiang and 叶聪 Cong Ye and Jiapei Wang and ZHIJUN DONG and Qin Zhang and G. M. Yuan and Yanjun Li and Xuanke Li},
title = {A hydrofluoric acid-free synthesis of 2D vanadium carbide (V2C) MXene for supercapacitor electrodes},
journal = {2D Materials},
year = {2020},
volume = {7},
publisher = {IOP Publishing},
month = {jan},
url = {https://doi.org/10.1088/2053-1583/ab6706},
number = {2},
pages = {25010},
doi = {10.1088/2053-1583/ab6706}
}
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Guan, Yunfeng, et al. “A hydrofluoric acid-free synthesis of 2D vanadium carbide (V2C) MXene for supercapacitor electrodes.” 2D Materials, vol. 7, no. 2, Jan. 2020, p. 25010. https://doi.org/10.1088/2053-1583/ab6706.