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Issue 17, 2014
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Two dimensional silicon nanowalls for lithium ion batteries

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One-dimensional (1-D) nanostructures such as nanowires and nanotubes have been widely explored for anodes with high specific capacity in Li-ion batteries, which effectively release the mechanical stress to avoid structure pulverization. However, 1-D nanostructures typically have a high surface area, which leads to a large irreversible capacity in the first cycle due to a solid electrolyte interface (SEI) formation. Two dimensional (2-D) nanowalls can address the same challenges as 1-D nanostructures, with a much lower surface area. For the first time, we demonstrated a 2-D nanowall structure with silicon for Li-ion batteries. Excellent performance for the first Coulombic efficiency (CE) has been achieved. Such a 2-D nanowall structure can also be applied in other devices with improved performance where nanostructures are needed but a high surface area is problematic.

Graphical abstract: Two dimensional silicon nanowalls for lithium ion batteries

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Publication details

The article was received on 05 Sep 2013, accepted on 11 Oct 2013 and first published on 11 Oct 2013

Article type: Communication
DOI: 10.1039/C3TA13546B
Citation: J. Mater. Chem. A, 2014,2, 6051-6057
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    Two dimensional silicon nanowalls for lithium ion batteries

    J. Wan, A. F. Kaplan, J. Zheng, X. Han, Y. Chen, N. J. Weadock, N. Faenza, S. Lacey, T. Li, J. Guo and L. Hu, J. Mater. Chem. A, 2014, 2, 6051
    DOI: 10.1039/C3TA13546B

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