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

Shi, Hebang; He, Zhou; Hu, Chaoquan; Li, Shaofu; Xiang, Maoqiao; Lv, Pengpeng; Zhu, Qingshan

doi:10.1016/j.partic.2020.10.007

Cited by 5 publications

(5 citation statements)

References 23 publications

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“…The XRD patterns for Gr-CNT and SiO x -Gr-CNT composite materials were demonstrated to reveal the crystalline structure (Figure S1a). The peaks for the Gr-CNT composite material at 26.38, 42.22, 44.39, 54.54, and 59.69° correspond to planes (002), (100), (101), (004), and (103) for carbon (green stars as marks), respectively . The peaks for the SiO x -Gr-CNT composite material at 28.04, 33.15, 35.60, 47.05, 56.03, 60.02, and 69.00° are assigned to SiO (PDF: 30-1127, red rhombus as marks) .…”

Section: Results and Discussionmentioning

confidence: 99%

“…Although the resistance of the SiO x -Gr-CNT composite electrode is larger than that of the Gr-CNT composite electrode, it is much smaller than that of raw SiO x electrodes . Therefore, the Gr-CNT composite material with high conductivity can remarkably enhance the conductivity of the SiO x -Gr-CNT composite material and further the impedance characteristic of the corresponding composite electrode. , For the purpose of demonstrating the interfacial behaviors of the electrodes, the EIS of the SiO x electrode and Gr-CNT and SiO x -Gr-CNT composite electrodes after 100 cycles was also performed, as shown in Figure S3. After cycling, all the R ct values of the electrodes increased.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The peaks for the Gr-CNT composite material at 26.38, 42.22, 44.39, 54.54, and 59.69°correspond to planes (002), (100), (101), (004), and (103) for carbon (green stars as marks), respectively. 25 The peaks for the SiO x -Gr-CNT composite re assigned to SiO (PDF: 30-1127, red rhombus as marks). 26 The Raman spectrum for the SiO x -Gr-CNT composite material was measured, as shown in Figure S1b.…”

Section: Resultsmentioning

confidence: 99%

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Graphene and Carbon Nanotube Dual-Decorated SiO_x Composite Anode Material for Lithium-Ion Batteries

et al. 2021

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In this study, a three-dimensional graphene- and carbon nanotube (CNT)-decorated SiO x composite material (SiO x -Gr-CNT) was synthesized. The dual carbon components were introduced by a simple one-step method of high-energy ball milling. The corresponding SiO x -Gr-CNT composite electrode exhibited superior lithium storage performance because the graphene and CNT components form a flexible network with high conductivity decorating on SiO x . The network is beneficial for the improvement of the conductivity of SiO x particles. The mechanical flexibility of the graphene and CNT components had a negligible volume effect, which could effectively suppress the volume expansion of SiO x and assist to form a durable solid electrolyte interphase film by separating SiO x particles from the electrolyte. Thus, the electrochemical properties of the corresponding SiO x -Gr-CNT composite electrode were effectively enhanced with a large reversible specific capacity of 1015.1 mA h g–1, which was maintained at 1046.6 mA h g–1 after cycling of 100 cycles with a capacity remaining exceeding 100% under a current density of 100 mA g–1. The SiO x -Gr-CNT composite electrode also exhibited outstanding cycling performance under a large current density of 1 A g–1 with more than 800 mA h g–1 reversible specific capacity even after 200 cycles. The method used for the combination of the SiO x -Gr-CNT composite anode material is simple and mass productive and thus is promising for practical application.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Graphene and Carbon Nanotube Dual-Decorated SiO_x Composite Anode Material for Lithium-Ion Batteries

et al. 2021

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“…The uniform fluidization of CNT agglomerates enables silane to achieve surface deposition of silicon, resulting in a composite material suitable for electrochemical testing as LIB anodes. Shi et al [140] also utilized fluidization as a process strengthening method, introducing graphite particles to mitigate SiO particle binding, inhibit the growth of agglomerates, and enhance fluidization, ultimately achieving in situ growth of (SiO+G)/CNT composite materials. This strategy ensures the uniformity and stability of the CNT and graphite, and the 3D network structure effectively alleviates electrode expansion and improves the mechanical flexibility of the material.…”

Section: Compound Expansion Of Nano Agglomerationsmentioning

confidence: 99%

Fluidization and Application of Carbon Nano Agglomerations

Chen,

Jiang,

Zhu

et al. 2023

Advanced Science

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Carbon nanomaterials are unique with excellent functionality and diverse structures. However, agglomerated structures are commonly formed because of small‐size effects and surface effects. Their hierarchical assembly into micro particles enables carbon nanomaterials to break the boundaries of classical Geldart particle classification before stable fluidization under gas‐solid interactions. Currently, there are few systematic reports regarding the structural evolution and fluidization mechanism of carbon nano agglomerations. Based on existing research on carbon nanomaterials, this article reviews the fluidized structure control and fluidization principles of prototypical carbon nanotubes (CNTs) as well as their nanocomposites. The controlled agglomerate fluidization technology leads to the successful mass production of agglomerated and aligned CNTs. In addition, the self‐similar agglomeration of individual ultralong CNTs and nanocomposites with silicon as model systems further exemplify the important role of surface structure and particle‐fluid interactions. These emerging nano agglomerations have endowed classical fluidization technology with more innovations in advanced applications like energy storage, biomedical, and electronics. This review aims to provide insights into the connections between fluidization and carbon nanomaterials by highlighting their hierarchical structural evolution and the principle of agglomerated fluidization, expecting to showcase the vitality and connotation of fluidization science and technology in the new era.

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“…The theoretical specific capacity of silicon can reach up to 4200 mAh g –1 , which is more than 10 times higher than graphite (372 mAh g –1 ). , After the industrialization of the silicon anode, the capacity of the battery will be greatly improved to meet the growing demand for high energy density in the market. Nevertheless, the commercial application of silicon is limited, due to its low electronic conductivity and its volume expansion (∼300%) during the lithiation/delithiation process. − It has been shown that the silicon/carbon composites have been explored, which can be used to solve the above problems by uniformly dispersing silicon nanoparticles in the conductive carbon network and keeping good contact with the conductive carbon network. − Carbon coating is usually used to enhance the conductivity of silicon–carbon anodes and reduce the contact between the active material and electrolyte. However, it has a weak charge transfer capability, which cannot meet the charge–discharge requirement at a high current density.…”

Section: Introductionmentioning

confidence: 99%

Constructing a Stable Conductive Network for High-Performance Silicon-Based Anode in Lithium-Ion Batteries

Liu,

Su,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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The application of carbon nanotubes to silicon nanoparticles has been used to improve the electrical conductivity of silicon−carbon anodes and prevent agglomeration of silicon nanoparticles during cycling. In this study, the composites are synthesized through an uncomplicated technique that involves the ultrasonication mixing of pyrene derivatives and carbon nanotubes and the formation of complexes with silicon nanoparticles in ultrasonic dispersion and magnetic stirring and then treated under vacuum. When the prepared composites are applied as lithium-ion battery anodes, the Si@(POH-AOCNTs) electrode displays a high reversible capacity of 3254.7 mAh g −1 at a current density of 0.1 A g −1 . Furthermore, it exhibits excellent cycling stability with a specific capacity of 1195.8 mAh g −1 after 500 cycles at 1.0 A g −1 . The superior electrochemical performance may be attributed to a large π-conjugated electron system of pyrene derivatives, which prompts the formation of a homogeneous CNTs conductive network and ensures the effective electron transfer, while the interaction between hydroxyl functional groups of hydroxypyrene and binder synergizes with CNTs network to further enhance the cycling stability of the composite.

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

Cited by 5 publications

References 23 publications

Graphene and Carbon Nanotube Dual-Decorated SiO_x Composite Anode Material for Lithium-Ion Batteries

Graphene and Carbon Nanotube Dual-Decorated SiO_x Composite Anode Material for Lithium-Ion Batteries

Fluidization and Application of Carbon Nano Agglomerations

Constructing a Stable Conductive Network for High-Performance Silicon-Based Anode in Lithium-Ion Batteries

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

Cited by 5 publications

References 23 publications

Graphene and Carbon Nanotube Dual-Decorated SiOx Composite Anode Material for Lithium-Ion Batteries

Graphene and Carbon Nanotube Dual-Decorated SiOx Composite Anode Material for Lithium-Ion Batteries

Fluidization and Application of Carbon Nano Agglomerations

Constructing a Stable Conductive Network for High-Performance Silicon-Based Anode in Lithium-Ion Batteries

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Product

Resources

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Graphene and Carbon Nanotube Dual-Decorated SiO_x Composite Anode Material for Lithium-Ion Batteries

Graphene and Carbon Nanotube Dual-Decorated SiO_x Composite Anode Material for Lithium-Ion Batteries