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Investigation of cycling-induced microstructural degradation in silicon-based electrodes in lithium-ion batteries using X-ray nanotomography
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Taiwo, Oluwadamilola O., Loveridge, Melanie, Beattie, Shane D., Finegan, Donal P., Bhagat, Rohit, Brett, Daniel J.L. and Shearing, Paul R. (2017) Investigation of cycling-induced microstructural degradation in silicon-based electrodes in lithium-ion batteries using X-ray nanotomography. Electrochimica Acta, 253 . pp. 85-92. doi:10.1016/j.electacta.2017.08.161 ISSN 0013-4686.
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Official URL: http://dx.doi.org/10.1016/j.electacta.2017.08.161
Abstract
The microstructural degradation of a composite silicon electrode at different stages in its cycle life was investigated in 3D using X-ray nano-computed tomography. A reconstructed volume of 36 μm × 27 μm × 26 μm from the composite electrode was imaged in its pristine state and after 1, 10 and 100 cycles. Particle fracturing and phase transformation was observed within the electrode with increased cycling. In addition, a distinct, lower X-ray attenuating phase was clearly resolved, which can be associated with surface film formation resulting from electrolyte breakdown and with silicon particle phase transformation. Changes in quantified microstructural properties such as phase volume fraction and particle specific surface area were tracked. Electrode performance loss is associated with loss of active silicon. These imaging results further highlight the capability of high resolution X-ray tomography to investigate the role of electrode microstructure in battery degradation and failure.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||||
| Library of Congress Subject Headings (LCSH): | Lithium ion batteries., Lithium cells., Silicon compounds. | ||||||||||||
| Journal or Publication Title: | Electrochimica Acta | ||||||||||||
| Publisher: | Pergamon | ||||||||||||
| ISSN: | 0013-4686 | ||||||||||||
| Official Date: | 1 November 2017 | ||||||||||||
| Dates: |
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| Volume: | 253 | ||||||||||||
| Page Range: | pp. 85-92 | ||||||||||||
| DOI: | 10.1016/j.electacta.2017.08.161 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||
| Date of first compliant deposit: | 9 April 2018 | ||||||||||||
| Date of first compliant Open Access: | 9 April 2018 | ||||||||||||
| RIOXX Funder/Project Grant: |
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