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Are MXenes Promising Anode Materials for Li Ion Batteries? Computational Studies on Electronic Properties and Li Storage Capability of Ti3C2 and Ti3C2X2 (X = F, OH) Monolayer

Tang, Qing, Zhou, Zhen, Shen, Panwen·2012·Journal of the American Chemical Society

Abstract

Density functional theory (DFT) computations were performed to investigate the electronic properties and Li storage capability of Ti(3)C(2), one representative MXene (M represents transition metals, and X is either C or/and N) material, and its fluorinated and hydroxylated derivatives. The Ti(3)C(2) monolayer acts as a magnetic metal, while its derived Ti(3)C(2)F(2) and Ti(3)C(2)(OH)(2) in their stable conformations are semiconductors with small band gaps. Li adsorption forms a strong Coulomb interaction with Ti(3)C(2)-based hosts but well preserves its structural integrity. The bare Ti(3)C(2) monolayer exhibits a low barrier for Li diffusion and high Li storage capacity (up to Ti(3)C(2)Li(2) stoichiometry). The surface functionalization of F and OH blocks Li transport and decreases Li storage capacity, which should be avoided in experiments. The exceptional properties, including good electronic conductivity, fast Li diffusion, low operating voltage, and high theoretical Li storage capacity, make Ti(3)C(2) MXene a promising anode material for Li ion batteries.

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Metadata

Authors
Tang, Q., Zhou, Z., & Shen, P.
Venue
Journal of the American Chemical Society
Published
2012-09-28
Volume
134
Issue
40
Pages
16909-16916
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2030460019
Cited by
2,254
References
6
FWCI
19.40
Type
journal article
Language
en
Open access
closed

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