Reversible crystalline-amorphous phase transformation in Si nanosheets with lithi-/delithiation

Jeong Min Park, Jae Hyun Cho, Jung Hoon Ha, Hae Sik Kim, Sung Wook Kim, Jaejun Lee, Kyung Yoon Chung, Byung Won Cho, Heon Jin Choi

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5 Citations (Scopus)

Abstract

Silicon (Si) has a large theoretical capacity of 4200 mAhg-1 and has great potential as a high-performance anode material for Li ion batteries (LIBs). Meanwhile, nanostructures can exploit the potential of Si and, accordingly, many zero-dimensional (0D) and one-dimensional (1D) Si nanostructures have been studied. Herein, we report on two-dimensional (2D) Si nanostructures, Si nanosheets (SiNSs), as anodes for LIBs. These 2D Si nanostructures, with a thickness as low 5 nm and widths of several micrometers, show reversible crystalline-amorphous phase transformations with the lithi-/delithiation by the dimensionality of morphology and large surface area. The reversible crystalline-amorphous phase transformation provides a structural stability of Li+ insertions and makes SiNSs promising candidates for reliable high-performance LIBs anode materials.

Original languageEnglish
Article number255401
JournalNanotechnology
Volume28
Issue number25
DOIs
Publication statusPublished - 2017 May 26

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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    Park, J. M., Cho, J. H., Ha, J. H., Kim, H. S., Kim, S. W., Lee, J., Chung, K. Y., Cho, B. W., & Choi, H. J. (2017). Reversible crystalline-amorphous phase transformation in Si nanosheets with lithi-/delithiation. Nanotechnology, 28(25), [255401]. https://doi.org/10.1088/1361-6528/aa6dad