期刊
APPLIED SURFACE SCIENCE
卷 513, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2020.145821
关键词
Ti2BN monolayer; Anode materials; First principles
类别
资金
- National Natural Science Foundation of China [11805088]
- National Basic Research Program of China [2015CB921103]
- China Postdoctoral Science Foundation [2018M641477]
- Guangdong Provincial Department of Science and Technology, China [2018A0303100013]
- Fundamental Research Funds for the Central Universities (Lanzhou University) [lzujbky-2018-19]
In this work, we theoretically design a new class of two-dimensional (2D) ternary transition-metal compound, namely, tetragonal Ti2BN monolayer sheet. The first-principles calculations proved that this system exhibits good dynamic and thermal stability, inherent metal properties and good mechanical properties. Additionally, we investigate the suitability of 2D Ti2BN as host materials in Li-ion batteries (LIBs). Our results show that the diffusion barrier of Li on surface (24 meV) and interlayer (165 meV) of Ti2BN monolayer are extremely low. At 300 K, their corresponding diffusion coefficient of Li are 6.08 x 10(-3) and 0.028 x 10(-3) cm s( -1), respectively. Besides, it also exhibits extremely high theoretical capacity (889 mA h g(-1)) and low average open circuit voltage (0.24 V). All these advanced properties indicate that Ti2BN monolayer is a promising negative electrode material for LIBs. In order to facilitate the experimental synthesis of this material, we theoretically predicted that Ag (1 0 0), Au (1 0 0) and Sn (1 0 0) may be good growth substrates for Ti2BN sheet.
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