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Issue 22, 2016
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Germanium sulfide nanosheet: a universal anode material for alkali metal ion batteries

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Abstract

As the most promising energy storage system (ESS), rechargeable alkali-metal (AM) ion batteries have been attracting great attention. A suitable anode material is quite crucial for successful development of AM ion batteries. Using first-principles calculations, we propose that a two-dimensional (2D) group-IV monochalcogenide, germanium sulfide nanosheet (GSNS), can serve as high-performance anodes for the AM (AM = Li, Na, and K) ion batteries. The interaction between AM atoms and GSNS is strong enough to prevent the clustering of the intercalated AM atoms that may occur in other 2D materials. The low energy barriers for the diffusion of AM atoms on GSNS, 0.236 (Li), 0.090 (Na) and 0.050 eV (K), suggest the high charge/discharge rate of the GSNS anodes. Low average electrode potentials and a high AM storage capacity up to 512 mA h gāˆ’1 (for Na) can be achieved in the AM/GSNS systems. In view of the higher abundance of Na and K than that of Li, our work offers a promising anode material for the development of low-cost Na and K ion batteries with high performance.

Graphical abstract: Germanium sulfide nanosheet: a universal anode material for alkali metal ion batteries

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Publication details

The article was received on 18 Apr 2016, accepted on 09 May 2016 and first published on 10 May 2016


Article type: Paper
DOI: 10.1039/C6TA03210A
J. Mater. Chem. A, 2016,4, 8905-8912

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    Germanium sulfide nanosheet: a universal anode material for alkali metal ion batteries

    F. Li, Y. Qu and M. Zhao, J. Mater. Chem. A, 2016, 4, 8905
    DOI: 10.1039/C6TA03210A

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