Issue 15, 2024

Superior performance of silicon nanowires@void@carbon on a conductive substrate as a scalable binder-free anode electrode for lithium-ion batteries

Abstract

There has been great interest in silicon-based anode materials for use in lithium-ion batteries (LIBs), and they have been implemented in multiple commercialized batteries in recent years. Herein, we present the synthesis of high-performance binder-free anode electrodes from carbon-coated silicon nanowires in a yolk–shell structure, with superior specific capacity, cycle life, rate capability, and coulombic efficiency. The silicon nanowires were grown on a stainless steel current collector via a low pressure chemical vapor deposition (LPCVD) process. A consequent silica sacrificial layer was conformally coated on the nanowires, followed by the direct current-plasma enhanced chemical vapor deposition (DC-PECVD) of a carbon nanolayer. The removal of the silica layer resulted in the formation of yolk–shell nanowires, which were implemented in a half-cell configuration LIB coin cell to investigate the electrochemical performance. At a current rate of 0.2C, an initial discharge specific capacity of 2882 mA h g−1 was achieved in the first cycle, which reached 1681 mA h g−1 at the end of 543 cycles. This is the first reported LIB anode electrode composed of silicon@void@carbon nanowires grown on a conductive substrate, and it offers excellent specific capacity, which in its lowest state is approximately 4.5 times that of the theoretical specific capacity of traditional graphite electrodes. This binder-free silicon-based electrode was realized through a controllable and scalable process, and can be implemented in high-performance LIBs.

Graphical abstract: Superior performance of silicon nanowires@void@carbon on a conductive substrate as a scalable binder-free anode electrode for lithium-ion batteries

Article information

Article type
Paper
Submitted
06 Mar 2024
Accepted
11 Jun 2024
First published
12 Jun 2024

Sustainable Energy Fuels, 2024,8, 3419-3437

Superior performance of silicon nanowires@void@carbon on a conductive substrate as a scalable binder-free anode electrode for lithium-ion batteries

M. Yasoubi, A. Habibi, S. Hoornam, Z. Sanaee and S. Mohajerzadeh, Sustainable Energy Fuels, 2024, 8, 3419 DOI: 10.1039/D4SE00314D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements