Stable anodes for lithium ion batteries made of self-organized mesoporous silicon

S.J. Wolter; M. Köntges; D. Bahnemann; R. Brendel

doi:10.1088/0268-1242/31/1/014007

Details

Original language	English
Article number	014007
Journal	Semiconductor Science and Technology
Volume	31
Issue number	1
Publication status	Published - 1 Oct 2015

Abstract

Alloy-forming compounds, such as electrodes for lithium ion batteries, stand out in terms of their theoretical specific charge capacity while still lacking in mechanical stability due to significant volume changes during operation. Herein, we examine the approach of combining low structural dimensions of the active material with built-in expansion volumes and assess their benefit for silicon anodes in lithium ion batteries. Consequently, self-organized mesoporous silicon is prepared as a suitable anode material for lithium ion batteries without any pre-structuring methods. The anodes are made by employing electrochemical etching methods in a scalable process and are characterized by ellipsometry. Thermally evaporated copper is utilized as the current collector. A sheet of freestanding silicon in contact with copper is used as an anode material with a thickness of 3 μm. After an initialization phase, electrochemical characterization reveals an anode stability of more than 160 cycles with a specific charge capacity of 730 mAh/g. The mechanical stability of the anode is examined by taking SEM measurements of the used electrode material.

Keywords

anode, cycle lifetime, lithium ion battery, mesoporous, self-organized, silicon

ASJC Scopus subject areas

Materials Science(all)
Electronic, Optical and Magnetic Materials
Physics and Astronomy(all)
Condensed Matter Physics
Engineering(all)
Electrical and Electronic Engineering
Materials Science(all)
Materials Chemistry

Sustainable Development Goals

SDG 7 - Affordable and Clean Energy

Cite this

Stable anodes for lithium ion batteries made of self-organized mesoporous silicon. / Wolter, S.J.; Köntges, M.; Bahnemann, D. et al.
In: Semiconductor Science and Technology, Vol. 31, No. 1, 014007, 01.10.2015.

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

Wolter, SJ, Köntges, M, Bahnemann, D & Brendel, R 2015, 'Stable anodes for lithium ion batteries made of self-organized mesoporous silicon', Semiconductor Science and Technology, vol. 31, no. 1, 014007. https://doi.org/10.1088/0268-1242/31/1/014007

Wolter, S. J., Köntges, M., Bahnemann, D., & Brendel, R. (2015). Stable anodes for lithium ion batteries made of self-organized mesoporous silicon. Semiconductor Science and Technology, 31(1), Article 014007. https://doi.org/10.1088/0268-1242/31/1/014007

Wolter SJ, Köntges M, Bahnemann D, Brendel R. Stable anodes for lithium ion batteries made of self-organized mesoporous silicon. Semiconductor Science and Technology. 2015 Oct 1;31(1):014007. doi: 10.1088/0268-1242/31/1/014007

Wolter, S.J. ; Köntges, M. ; Bahnemann, D. et al. / Stable anodes for lithium ion batteries made of self-organized mesoporous silicon. In: Semiconductor Science and Technology. 2015 ; Vol. 31, No. 1.

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Research@Leibniz University