Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 889, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.161542
Keywords
MXenes; Nb2CTx; Lithium-ion storage; Developing intrinsic properties; Excellent electrochemical properties
Categories
Funding
- National Science Foundation of China [51772070, 51772069]
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The study focuses on developing intrinsic properties of Nb2CTx and directly preparing Nb2CTx with excellent lithium-ion storage capacity. The simple method used to treat Nb2AlC results in Li-Nb2CTx with superior electrochemical performance.
Nb2CTx MXene have received extensive attention due to their unique properties. However, it has always been a challenge to prepare Nb2CTx with excellent electrochemical performance in one step. In this work, we focus on developing intrinsic properties of Nb2CTx and directly preparing Nb2CTx with excellent lithium-ion storage capacity. A simple method of treating Nb2AlC with a mixed solution of HCl and LiF has prepared Nb2CTx with large interlayer spacing, good surface group configuration and pre-intercalated Li+. The Li+ ion storage capacity of Li-Nb2CTx was evaluated, and showed superior performance. At 0.05 A g(-1), the specific capacity of Li-Nb2CTx electrode is 425 mAh g(-1), and it is almost unchanged during 1000 h of charging and discharging. At 1.00 A g(-1), the specific capacity is stable at 321 mAh g(-1) during 800 cycles. Using a simple method to reasonably develop the intrinsic properties of Nb2CTx can directly obtain Li-Nb2CTx with excellent electrochemical properties. This result further enhances the application prospects of Nb2CTx in Li+ ion storage devices. (C) 2021 Elsevier B.V. All rights reserved.
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