Lithium-storage properties of SiO2 nanotubes@C using carbon nanotubes as templates

Shi, Zixu; Shi, Chaoyun; Shi, Huili; He, Binfang; Qin, Guoqiang; Li, Ao; Jing, Zhu

doi:10.1016/j.partic.2023.02.009

Cited by 8 publications

(3 citation statements)

References 52 publications

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“…SiO 2 during charge and discharge converted into Si, LiO 2 and Li 4 SiO 4 in the first cycles as shown (reaction (1), ( 2) and ( 4)), which is also related to low ICE [36,37]. After the formation of Si is completed inside the cell, Li + ions react with Si reversibly during the alloying reaction, resulting in stable and constant capacity [36]. Formation of LiO 2 or Li 4 SiO 4 alleviates also to pulverization of Si during alloying process of Si [37].…”

Section: Resultsmentioning

confidence: 92%

“…The high capacity of the pre-lithiated SiO 2 @C electrode is attributed to the pre-lithiation treatment, which creates more electrochemically active sites and diffusion channels inside the amorphous SiO 2 for Li + ions to move through. SiO 2 during charge and discharge converted into Si, LiO 2 and Li 4 SiO 4 in the first cycles as shown (reaction (1), ( 2) and ( 4)), which is also related to low ICE [36,37]. After the formation of Si is completed inside the cell, Li + ions react with Si reversibly during the alloying reaction, resulting in stable and constant capacity [36].…”

Section: Resultsmentioning

confidence: 92%

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Electrochemically pre-lithiated SiO₂@C nanocomposite anodes for improved performance in lithium-ion batteries

Ozen,

Eroglu,

Karatepe

2023

Nanotechnology

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Silica (SiO2)-based materials are a promising alternative anode material due to their high specific capacity, abundance, safety, and environmental friendliness. However, the significant volume expansion and the formation of a solid electrolyte interphase (SEI) with electrolytes cause active lithium loss and result in poor Coulombic efficiency of SiO2-based materials, which hinder their commercial applications. Therefore, pre-lithiation, a method of embedding extra lithium ions in the electrodes prior to cycling, is an effective approach to replenish the largely irreversible lithium loss during cycling and overcomes these challenges. In this study, carbon-coated silica (SiO2@C) nano composite was synthesized via a sol–gel method and the beneficial impacts of using pre-lithiated SiO2@C electrodes in coin cells were investigated. It is shown that the carbon coating onto the surface of the SiO2 particles and the pre-lithiation method led to a distinct improvement in the overall capacity and Coulombic efficiency of the cells due to the pre-formed SEI and the presence of a lithium reservoir within the anode. Furthermore, the anodes exhibited excellent cycling stability and good rate capability up to 2 A g−1.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 92%

Electrochemically pre-lithiated SiO₂@C nanocomposite anodes for improved performance in lithium-ion batteries

Ozen,

Eroglu,

Karatepe

2023

Nanotechnology

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“…The peak current (i) displayed a nonlinear relationship with the square root of the scanning rate ( v ), indicating a pseudocapacitive behavior. The contribution of pseudocapacitance between i and v can be calculated using the following equations (eqs and ) − i = a v b log nobreak0em0.25em⁡ i = b 0.25em log nobreak0em0.25em⁡ v + log nobreak0em0.25em⁡ a where a and b are the parameters related to the Li + intercalation and deintercalation processes, and the adjustable parameters a and b can be determined by the intercept and slope of the fitting line of the logarithmic current (log ( i )) and logarithmic potential (log ( v )). Li + diffusion can be used to judge the electrochemical reactions .…”

Section: Resultsmentioning

confidence: 99%

Carbon-Coated Si Nanosheets as Anode Materials for High-Performance Lithium-Ion Batteries

Qin,

Jia,

Sun

et al. 2024

ACS Appl. Nano Mater.

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Silicon (Si) and Si-based compounds have been considered by many researchers as one of the anode materials for the next-generation lithium-ion batteries (LIBs) due to their extraordinarily large theoretical capacity, moderate operating voltage, and abundant resources. However, silicon's poor conductivity and significant volume changes during charge and discharge, compared to conventional carbon materials, severely restrict its widespread use in LIBs. In this study, a two-dimensional (2D) mesoporous Si nanosheet/carbon (pSi@C) composite is designed using cetrimonium bromide−disodium edetate dihydrate (CTAB−EDTA) as a template via a sol−gel method, magnesium thermal reduction method, and thermal decomposition method. The vertical diffusion distance of Li + is significantly reduced by the 2D Si nanosheets. Additionally, the carbon coating on the Si surface provides a protective layer to limit the volume expansion of Si and form a stable solid electrolyte interface (SEI). This enhances the structural integrity and cycle stability of the pSi@C anode material during Li + insertion and extraction. At a current density of 1 A g −1 , the reversible capacity of the pSi@C composite after 150 cycles is 2236 mAh g −1 , with a capacity retention rate of 71.5%. The electrode's capacity is 467.8 mAh g −1 after 500 cycles at a current density of 5 A g −1 . Therefore, this unique template and technology can be used to design 2D anode composites with excellent properties, thereby providing an effective strategy for commercial application of LIBs.

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Targeting inerratic deposition behaviour via interface regulation toward dendrite-free zinc metal anodes

Zhu,

Ren,

Tian

et al. 2024

Chemical Engineering Journal

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Lithium-storage properties of SiO2 nanotubes@C using carbon nanotubes as templates

Cited by 8 publications

References 52 publications

Electrochemically pre-lithiated SiO₂@C nanocomposite anodes for improved performance in lithium-ion batteries

Electrochemically pre-lithiated SiO₂@C nanocomposite anodes for improved performance in lithium-ion batteries

Carbon-Coated Si Nanosheets as Anode Materials for High-Performance Lithium-Ion Batteries

Targeting inerratic deposition behaviour via interface regulation toward dendrite-free zinc metal anodes

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Lithium-storage properties of SiO2 nanotubes@C using carbon nanotubes as templates

Cited by 8 publications

References 52 publications

Electrochemically pre-lithiated SiO2@C nanocomposite anodes for improved performance in lithium-ion batteries

Electrochemically pre-lithiated SiO2@C nanocomposite anodes for improved performance in lithium-ion batteries

Carbon-Coated Si Nanosheets as Anode Materials for High-Performance Lithium-Ion Batteries

Targeting inerratic deposition behaviour via interface regulation toward dendrite-free zinc metal anodes

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Product

Resources

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Electrochemically pre-lithiated SiO₂@C nanocomposite anodes for improved performance in lithium-ion batteries

Electrochemically pre-lithiated SiO₂@C nanocomposite anodes for improved performance in lithium-ion batteries