Silicon/Carbon Nanotube/BaTiO3 Nanocomposite Anode: Evidence for Enhanced Lithium-Ion Mobility Induced by the Local Piezoelectric Potential

Byoung Sun Lee; Jihyun Yoon; Changhoon Jung; Dong Young Kim; Seung Yeol Jeon; Ki Hong Kim; Jun Ho Park; Hosang Park; Kang Hee Lee; Yoon Sok Kang; Jin Hwan Park; Heechul Jung; Woong Ryeol Yu; Seok Gwang Doo

doi:10.1021/acsnano.5b07674

Silicon/Carbon Nanotube/BaTiO₃ Nanocomposite Anode: Evidence for Enhanced Lithium-Ion Mobility Induced by the Local Piezoelectric Potential

Byoung Sun Lee, Jihyun Yoon, Changhoon Jung, Dong Young Kim, Seung Yeol Jeon, Ki Hong Kim, Jun Ho Park, Hosang Park, Kang Hee Lee, Yoon Sok Kang, Jin Hwan Park, Heechul Jung, Woong Ryeol Yu, Seok Gwang Doo

Dept. of Future Energy Convergence

Research output: Contribution to journal › Article › peer-review

102 Scopus citations

Abstract

We report on the synergetic effects of silicon (Si) and BaTiO₃ (BTO) for applications as the anode of Li-ion batteries. The large expansion of Si during lithiation was exploited as an energy source via piezoelectric BTO nanoparticles. Si and BTO nanoparticles were dispersed in a matrix consisting of multiwalled carbon nanotubes (CNTs) using a high-energy ball-milling process. The mechanical stress resulting from the expansion of Si was transferred via the CNT matrix to the BTO, which can be poled, so that a piezoelectric potential is generated. We found that this local piezoelectric potential can improve the electrochemical performance of the Si/CNT/BTO nanocomposite anodes. Experimental measurements and simulation results support the increased mobility of Li-ions due to the local piezoelectric potential.

Original language	English
Pages (from-to)	2617-2627
Number of pages	11
Journal	ACS Nano
Volume	10
Issue number	2
DOIs	https://doi.org/10.1021/acsnano.5b07674
State	Published - 23 Feb 2016

Keywords

large volume expansion
Li-ion mobility
local electric potential
piezoelectric particle
silicon anode

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsnano.5b07674

Cite this

Lee, B. S., Yoon, J., Jung, C., Kim, D. Y., Jeon, S. Y., Kim, K. H., Park, J. H., Park, H., Lee, K. H., Kang, Y. S., Park, J. H., Jung, H., Yu, W. R., & Doo, S. G. (2016). Silicon/Carbon Nanotube/BaTiO₃ Nanocomposite Anode: Evidence for Enhanced Lithium-Ion Mobility Induced by the Local Piezoelectric Potential. ACS Nano, 10(2), 2617-2627. https://doi.org/10.1021/acsnano.5b07674

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abstract = "We report on the synergetic effects of silicon (Si) and BaTiO3 (BTO) for applications as the anode of Li-ion batteries. The large expansion of Si during lithiation was exploited as an energy source via piezoelectric BTO nanoparticles. Si and BTO nanoparticles were dispersed in a matrix consisting of multiwalled carbon nanotubes (CNTs) using a high-energy ball-milling process. The mechanical stress resulting from the expansion of Si was transferred via the CNT matrix to the BTO, which can be poled, so that a piezoelectric potential is generated. We found that this local piezoelectric potential can improve the electrochemical performance of the Si/CNT/BTO nanocomposite anodes. Experimental measurements and simulation results support the increased mobility of Li-ions due to the local piezoelectric potential.",

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