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Partic. vol. 56 pp. 84-90 (June 2021)
doi: 10.1016/j.partic.2020.10.007

Efficient fluidization intensification process to fabricate in-situ dispersed (SiO + G)/CNTs composites for high-performance lithium-ion battery anode applications

Hebang Shia,b, He Zhangc, Chaoquan Hua,b,d, Shaofu Lia,b,d, Maoqiao Xianga, Pengpeng Lva,b,*, Qingshan Zhua,b,*

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lvpengpeng@ipe.ac.cn qszhu@ipe.ac.cn

Highlights

    • A process intensification method was used to prepare SiO anodes. • The introduction of graphite can significantly improve the fluidization of SiO. • The 3D network formed by CNTs/G enhanced the structural stability of the composite.

Abstract

An efficient fluidization process intensification method was proposed to prepare carbon nanotube (CNT)-enhanced high-performance SiO anodes for lithium-ion batteries. The introduction of graphite particles decreased bonding among SiO particles, inhibiting agglomerate growth and enhancing fluidization. The (SiO + G)/CNTs composites were synthesized by fluidized bed chemical vapor deposition with the CNTs grown in-situ, which ensured uniform dispersion and superior anchoring of the CNTs. The in-situ-grown CNTs and stacked graphite ensured excellent structural stability and conductivity. The synthesized (SiO + G)/CNTs delivered a stable reversible capacity of 466 mAh g−1 after 125 cycles and a capacity of ∼200 mAh g−1 at 2 A g−1. The charging results indicated that the 3D network structure comprising CNTs and graphite not only effectively buffered the electrode expansion but also greatly improved mechanical flexibility.

Graphical abstract

Keywords

Process intensification; Fluidized bed chemical vapor deposition; Carbon nanotubes; Silicon suboxide anode