The fabrication of silicon/dual-network carbon nanofibers/carbon nanotubes as free-standing anodes for lithium-ion batteries

Zhao, Yixin; Pan, Xingchen; Liu, Mingqi; Chen, Xiangxiang; Zhang, Rui; Zhiyong, Xie

doi:10.1039/d3ra05755k

RSC Adv.

2023

DOI: 10.1039/d3ra05755k

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The fabrication of silicon/dual-network carbon nanofibers/carbon nanotubes as free-standing anodes for lithium-ion batteries

Yixin Zhao,

Xingchen Pan,

Mingqi Liu

et al.

Abstract: A novel free-standing Si/C anode (noted as Si/CNFs/CNTs) is synthesized by combining electrospinning and in situ chemical vapor deposition, in which Si nanoparticles are composited with conducting dual-network composed of carbon nanofibers (CNFs) and in situ deposited carbon nanotubes (CNTs).

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Prelithiated Carbon Nanotube‐Embedded Silicon‐based Negative Electrodes for High‐Energy Density Lithium‐Ion Batteries

Ünal,

Maccio‐Figgemeier,

Haneke

et al. 2024

Adv Materials Inter

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Multi‐walled carbon Nanotubes (MWCNTs) are hailed as beneficial conductive agents in Silicon (Si)‐based negative electrodes due to their unique features enlisting high electronic conductivity and the ability to offer additional space for accommodating the massive volume expansion of Si during (de‐)lithiation. However, both MWCNTs and Siirreversibly consume an enormous amount of Li inventory to principally form a Solid Electrolyte Interphase (SEI) and due to other parasitic reactions, which results in lowering the Coulombic Efficiency (CE), rapid decrease in reversible capacity, and shorter battery life.To tackle these hurdles, electrochemical prelithiation is adopted as a taming strategy to mitigate the large capacity loss (nearly reducing the first irreversible capacity by ≈60%) of MWCNT‐Si/Graphite (Gr) negative electrode‐based full‐cells. In contrast, a yardstick negative electrode utilizing commercially used Super P (Super P‐Si/Gr) showed a reduction of ≈47% after in vitro pre‐doping with lithium, which is considerably smaller compared to that of MWCNTs‐based electrode design. Furthermore, the Initial CE, life cycle, and rate capability are enhanced by prelithiation. Interestingly, prelithiation brings more impact on MWCNTs ‐Si/Gr than with Super P‐Si/Gr design. An in‐depth analysis using X‐ray photoelectron spectroscopy (XPS), RAMAN Spectroscopy, Attenuated Total Reflection Fourier Transform Infrared Spectroscopy (ATR FTIR), laser microscopy, and Scanning Electron Microscopy (SEM) reveal deeper insights into the differences in SEI layer between prelithiated MWCNTs and their Super P‐based electrode counterparts.

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Prelithiated Carbon Nanotube‐Embedded Silicon‐based Negative Electrodes for High‐Energy Density Lithium‐Ion Batteries

Ünal,

Maccio‐Figgemeier,

Haneke

et al. 2024

Adv Materials Inter

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A low-cost Si@C composite for lithium-ion batteries anode materials synthesized via freeze-drying process using kerf loss Si waste

Ji,

Xu,

et al. 2024

Ionics

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Enhancing lithium storage by reticulated RGO as a buffer layer in silicon‑carbon composites

Wang,

Ding,

Yin

et al. 2024

Journal of Energy Storage

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The fabrication of silicon/dual-network carbon nanofibers/carbon nanotubes as free-standing anodes for lithium-ion batteries

Cited by 5 publications

References 53 publications

Prelithiated Carbon Nanotube‐Embedded Silicon‐based Negative Electrodes for High‐Energy Density Lithium‐Ion Batteries

Prelithiated Carbon Nanotube‐Embedded Silicon‐based Negative Electrodes for High‐Energy Density Lithium‐Ion Batteries

A low-cost Si@C composite for lithium-ion batteries anode materials synthesized via freeze-drying process using kerf loss Si waste

Enhancing lithium storage by reticulated RGO as a buffer layer in silicon‑carbon composites

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