Conjugation with carbon nanotubes improves the performance of mesoporous silicon as Li-ion battery anode

Abstract

Carbon nanotubes can be utilized in several ways to enhance the performance of silicon-based anodes. In the present work, thermally carbonized mesoporous silicon (TCPSi) microparticles and single-walled carbon nanotubes (CNTs) are conjugated to create a hybrid material that performs as the Li-ion battery anode better than the physical mixture of TCPSi and CNTs. It is found out that the way the conjugation is done has an essential role in the performance of the anode. The conjugation should be made between negatively charged TCPSi and positively charged CNTs. Based on the electrochemical experiments it is concluded that the positive charges, i.e., excess amine groups of the hybrid material interfere with the diffusion of the lithium cations and thus they should be removed from the anode. Through the saturation of the excess positive amine groups on the CNTs with succinic anhydride, the performance of the hybrid material is even further enhanced.

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Item Type:	Article
Authors/Creators:	Ikonen, T. Kalidas, N. Lahtinen, K. Isoniemi, T. https://orcid.org/0000-0003-0238-1006 Toppari, J.J. Vázquez, E. Herrero-Chamorro, M.A. Fierro, J.L.G. Kallio, T. Lehto, V.-P.
Copyright, Publisher and Additional Information:	© 2020 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Keywords:	Batteries; Carbon nanotubes and fullerenes; Electronic properties and materials; Energy science and technology; Energy storage
Dates:	Published: 1 December 2020 Published (online): 27 March 2020 Accepted: 14 March 2020
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)
Depositing User:	Symplectic Sheffield
Date Deposited:	14 Mar 2024 09:00
Last Modified:	14 Mar 2024 09:00
Status:	Published
Publisher:	Springer Science and Business Media LLC
Refereed:	Yes
Identification Number:	10.1038/s41598-020-62564-0
Related URLs:	PubMed URL
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:209860

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Conjugation with carbon nanotubes improves the performance of mesoporous silicon as Li-ion battery anode

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