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

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 hav...

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Bibliographic Details
Published in:Nanotechnology 2017-06, Vol.28 (25), p.255401
Main Authors: Park, Jeong Min, Cho, Jae-Hyun, Ha, Jung Hoon, Kim, Hae-Sik, Kim, Sung-Wook, Lee, Jaejun, Chung, Kyung Yoon, Cho, Byung-Won, Choi, Heon-Jin
Format: Article
Language:English
Subjects:
lithium ion batteries
recrystallization
reversible phase transition
silicon nanosheets
two-dimensional nanostructures
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Summary: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.
ISSN:0957-4484
1361-6528
DOI:10.1088/1361-6528/aa6dad