Optimising hollow-structured silicon nanoparticles for lithium-ion batteries

Yue, Chenghao, Liu, Yao, Guan, Shaoliang, Fereydooni, Alireza, Zeng, Yuexi, Wei, Zhijie, Wang, Yonggang and Chao, Yimin 2023. Optimising hollow-structured silicon nanoparticles for lithium-ion batteries. Materials 16 (17) , 5884. 10.3390/ma16175884

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Abstract

Silicon has been proven to be one of the most promising anode materials for the next generation of lithium-ion batteries for application in batteries, the Si anode should have high capacity and must be industrially scalable. In this study, we designed and synthesised a hollow structure to meet these requirements. All the processes were carried out without special equipment. The Si nanoparticles that are commercially available were used as the core sealed inside a TiO2 shell, with rationally designed void space between the particles and shell. The Si@TiO2 were characterised using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The optimised hollow-structured silicon nanoparticles, when used as the anode in a lithium-ion battery, exhibited a high reversible specific capacity over 630 mAhg−1, much higher than the 370 mAhg−1 from the commercial graphite anodes. This excellent electrochemical property of the nanoparticles could be attributed to their optimised phase and unique hollow nanostructure.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Cardiff Catalysis Institute (CCI) Chemistry
Additional Information:	License information from Publisher: LICENSE 1: URL: https://creativecommons.org/licenses/by/4.0/, Type: open-access
Publisher:	MDPI
ISSN:	1996-1944
Date of First Compliant Deposit:	8 September 2023
Date of Acceptance:	24 August 2023
Last Modified:	28 Sep 2023 22:17
URI:	https://orca.cardiff.ac.uk/id/eprint/162333

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