A robust hierarchical 3D Si/CNTs composite with void and carbon shell as Li-ion battery anodes

Zhang, Hui; Zhang, Xiaofeng; Jin, Huixin; Zong, Ping; Bai, Yu; Lian, Kun; Xu, Hui; Ma, Fang

doi:10.1016/j.cej.2018.07.054

Cited by 87 publications

(42 citation statements)

References 46 publications

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“…(2) the adjustment of the void space surrounding the Si particle through the optimization of the Si/CB ratio, the type of CB and the carbon yield of carbon precursor used for the SCB synthesis. It appears that the void space is very critical for long term cycling stability of Si/C composite anode, as demonstrated in many previous works [39][40][41][42][43][44]. The void space can accommodate the large volume change caused by the lithiation/de-lithiation of Si and maintain the structural integrity of Si-based anode materials, thereby inhibiting the continuous growth of the SEI film during cycling and (3) the use of electrolyte additives.…”

Section: Resultsmentioning

confidence: 95%

Preparation and Characterization of Core-Shell Structure Hard Carbon/Si-Carbon Composites with Multiple Shell Structures as Anode Materials for Lithium-Ion Batteries

Kim

Lee

2021

Energies

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Novel core-shell structure hard carbon/Si-carbon composites are prepared, and their electrochemical performances as an anode material for lithium-ion batteries are reported. Three different types of shell coating are applied using Si-carbon, Si-carbon black-carbon and Si-carbon black-carbon/graphite nanosheets. It appears that the use of n-Si/carbon black/carbon composite particles in place of n-Si for the shell coating is of great importance to achieve enhanced electrochemical performances from the core-shell composite samples, and additional wrapping with graphite nanosheets leads to a more stable cycle performance of the core-shell composites.

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Section: Resultsmentioning

confidence: 95%

Preparation and Characterization of Core-Shell Structure Hard Carbon/Si-Carbon Composites with Multiple Shell Structures as Anode Materials for Lithium-Ion Batteries

Kim

Lee

2021

Energies

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“…In an attempt to suppress the volume change and enhance rate capability, a number of strategies have been developed, such as producing silicon-nanoparticles [78], aligning silicon-nanowires [79]/nanotubes [80], and dispersing silicon into the matrix (e.g. amorphous carbon) [81]. Taking benefit of the high mechanical stability of ACMs, recent reports demonstrate that carbon-silicon composites can suppress the volume change and improve the overall electrochemical performance for LIBs [77,81].…”

Section: Serving In Non-carbon Composite Anodesmentioning

confidence: 99%

Amorphous carbon-based materials as platform for advanced high-performance anodes in lithium secondary batteries

et al. 2021

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The growing concern for the exhaustion of fossil energy and the rapid revolution of electronics have created a rising demand for electrical energy storage devices with high energy density, for example, lithium secondary batteries (LSBs). With high surface area, low cost, excellent mechanical strength, and electrochemical stability, amorphous carbon-based materials (ACMs) have been widely investigated as promising platform for anode materials in the LSBs. In this review, we firstly summarize recent advances in the synthesis of the ACMs with various morphologies, ranging from zero-to three-dimensional structures. Then, the use of ACMs in Li-ion batteries and Li metal batteries is discussed respectively with the focus on the relationship between the structural features of the as-prepared ACMs and their roles in promoting electrochemical performances. Finally, the remaining challenges and the possible prospects for the use of ACMs in the LSBs are proposed to provide some useful clews for the future developments of this attractive area.

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“…The enhanced high‐rate and cycling capacities of Si/carbon (Si/C) composites should be attributed to the fact that carbon materials in Si/C composites can act not only as buffer layer to alleviate the volume expansion of Si, but also as electronic transmission pathway. Carbon matrix used in Si/C composites mainly includes amorphous carbon obtained from various carbon precursors (e.g., resin, 14–16 pitch, 17–19 and polymer 20–22 ); graphitized carbon with high degree of graphitization (e.g., graphene, 23–25 graphite, 26–28 and carbon nanotubes (CNTs) 29–31 ); and mixed‐conducting carbon phase.…”

Section: Introductionmentioning

confidence: 99%

“…On this issue, many synthetic processes have been developed 32,33 . Zhang et al 34 constructed 3D structural Si/CNTs@C composites by four‐step method (i.e., spray drying, filling with sulfur, carbon coating, and further carbonization), the Si/CNTs@C composites show a high reversible capacity of 943 mAh·g −1 after 1,000 cycles at C/5 rate. An et al 35 has fabricated the three‐dimensional RH‐Nano Si@C/CNT composites via electrostatic self‐assembly between amine‐functionalized Si and CNT, hydrothermal treating in glucose solution, and further calcination, and the specific capacities of the composites are 989.5 mAh·g −1 at 0.5C and 345 mAh·g −1 at 3C as well as low capacity decay of 0.035% per cycles after 1,000 cycles.…”

Section: Introductionmentioning

confidence: 99%

Si/CNTs@melamine‐formaldehyde resin‐based carbon composites and its improved energy storage performances

Zhao

Zhang

Xian

2020

J of Applied Polymer Sci

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In this paper, Si/carbon nanotubes@melamine-formaldehyde resin (MFR)based carbon (Si/CNTs@C) composites have been fabricated by surface modification, electrostatic self-assembly, cross-linking of MFR under hydrothermal treatment and further carbonization. The microstructure of the Si/CNTs@C composites was characterized, and the effects of CNTs content in Si/CNTs@C composites on their electrochemical performances were also investigated in detail. The results indicate Si/CNTs@C composites as anode materials of Liion batteries exhibit better high-rate and cycling performances compared to Si and Si@MFR-based carbon composites. Notably, Si/CNTs@C composites with 10.4 wt% CNTs show specific capacities of 1900, 1879, 1,688, 1,394, 1,189 mAhÁg −1 at 0.2, 0.5, 1, 2, and 3 AÁg −1 , respectively. Even at 4 and 5 AÁg −1 , their capacities still reach 970 and 752 mAhÁg −1 , respectively. Moreover, they deliver a reversible capacity of 1,184 mAhÁg −1 at 0.5 AÁg −1 after 100 cycles. Therefore, the reasonable structure is of great significance for enhancing the electrochemical performances of Si-based composites.

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A robust hierarchical 3D Si/CNTs composite with void and carbon shell as Li-ion battery anodes

Cited by 87 publications

References 46 publications

Preparation and Characterization of Core-Shell Structure Hard Carbon/Si-Carbon Composites with Multiple Shell Structures as Anode Materials for Lithium-Ion Batteries

Preparation and Characterization of Core-Shell Structure Hard Carbon/Si-Carbon Composites with Multiple Shell Structures as Anode Materials for Lithium-Ion Batteries

Amorphous carbon-based materials as platform for advanced high-performance anodes in lithium secondary batteries

Si/CNTs@melamine‐formaldehyde resin‐based carbon composites and its improved energy storage performances

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