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http://hdl.handle.net/10397/95599
Title: | Two-dimensional porous silicon nanosheets as anode materials for high performance lithium-ion batteries | Authors: | Tang, J Yin, Q Wang, Q Li, Q Wang, H Xu, Z Yao, H Yang, J Zhou, X Kim, JK Zhou, L |
Issue Date: | 14-Jun-2019 | Source: | Nanoscale, 14 June 2019, v. 11, no. 22, p. 10984-10991 | Abstract: | In this paper, silicon nanosheets (Si-NSs) are chemically synthesized by using graphene oxide nanosheets as the template. The obtained Si-NSs, which are aggregations of silicon nanocrystals with a size of ∼10 nm, are applied directly as the anode material for lithium ion batteries, delivering a reversible capacity of 800 mA h g-1 after 900 cycles at a rate as high as 8400 mA g-1. Ex situ measurements and in situ observations show the positive effect of the mesoporous structure on the structural stability of Si-NSs. The evolution and survivability of the porous structures during lithiation and delithiation processes are investigated by molecular dynamics simulations, demonstrating that the porous structure can enhance the amount of "active" Li atoms during the stable stage of cycling and therefore promote mass capacity. The longer the survival of the porous structure, the longer the high mass capacity can be retained. | Publisher: | Royal Society of Chemistry | Journal: | Nanoscale | ISSN: | 2040-3364 | EISSN: | 2040-3372 | DOI: | 10.1039/c9nr01440c | Rights: | This journal is © The Royal Society of Chemistry 2019 The following publication Tang, J., Yin, Q., Wang, Q., Li, Q., Wang, H., Xu, Z., ... & Zhou, L. (2019). Two-dimensional porous silicon nanosheets as anode materials for high performance lithium-ion batteries. Nanoscale, 11(22), 10984-10991 is available at https://doi.org/10.1039/c9nr01440c |
Appears in Collections: | Journal/Magazine Article |
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Tang_Two-Dimensional_Porous_Silicon.pdf | Pre-Published version | 1 MB | Adobe PDF | View/Open |
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