Journal article
Li-ion uptake and increase in interlayer spacing of Nb4C3 MXene
Energy Storage Materials, v 8, pp 42-48
Jul 2017
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Two-dimensional (2D) carbides, MXenes, have shown promise for electrochemical energy storage, but most studies were conducted on titanium carbides. Herein we report on Li insertion into a 2D Nb4C3Tx MXene, formed by etching aluminum from Nb4AlC3 in HF at room temperature. The theoretical capacity of Nb4C3Tx has not been studied, but it displayed a higher capacity than as-produced titanium carbide and other MXenes, when tested as anode for lithium ion batteries. In addition, the charge/discharge capacity of the Nb4C3Tx anode increases with cycling. For instance, after 100 charge/discharge cycles, the specific capacity increased from 310mAhg−1 (194mAhcm−3) to 380mAhg−1 (238mAhcm−3), at a current density of 0.1Ag−1, and the capacity increased from 116mAhg−1 (73mAhcm−3) to 320mAhg−1 (200mAhcm−3) at 1Ag−1. Excellent rate capability and superior long-term stability at the ultrahigh rates have been demonstrated. This work is expected to inspire further exploration of MXenes for high-performance Li-ion batteries and capacitors. Since Nb4C3Tx is just one of many MXenes, there is much room for improving the accessibility of the electronically conducting layered structures of MXenes and achieving a better electrochemical performance.
Nb4C3Tx MXene, is formed by etching Al from Nb4AlC3 in HF at room temperature. As anode for lithium ion batteries, it displays a higher capacity than as-produced titanium carbide MXenes, and the charge/discharge capacity of the Nb4C3Tx anode increases with cycling. The mechanisms of its excellent rate capability and superior long-term stability at the ultrahigh rate have been studied and explained. [Display omitted]
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Details
- Title
- Li-ion uptake and increase in interlayer spacing of Nb4C3 MXene
- Creators
- Shuangshuang Zhao - Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, PR ChinaXing Meng - Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, PR ChinaKai Zhu - Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, PR ChinaFei Du - Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, PR ChinaGang Chen - Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, PR ChinaYingjin Wei - Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, PR ChinaYury Gogotsi - Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, PR ChinaYu Gao - Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, PR China
- Publication Details
- Energy Storage Materials, v 8, pp 42-48
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000406777100007
- Scopus ID
- 2-s2.0-85018506643
- Other Identifier
- 991014969887204721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology