Silicon nanoparticles encapsulated in multifunctional crosslinked nano-silica/carbon hybrid matrix as a high-performance anode for Li-ion batteries

Dai, Xiaoqian; Liu, Huitian; Xu, Liu; Liu, Zhaolin; Liu, Yuansheng; Cao, Yuhao; Tao, Junyan; Shan, Zhongqiang

doi:10.1016/j.cej.2021.129468

Cited by 77 publications

(31 citation statements)

References 40 publications

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“…A main strategy to overcome the challenges of silica as an anode material has been to use carbon as a conductive matrix material. Carbon coating provides an effective solution to the above issue, improving the cycling stability by buffering the volume expansion of the silica particles [ 24 , 25 , 26 , 27 , 28 , 29 , 30 ]. Therefore, it is desirable to design a sustainable and eco-friendly preparation route for C/SiO 2 composites.…”

Section: Introductionmentioning

confidence: 99%

Carbon-Coated SiO2 Composites as Promising Anode Material for Li-Ion Batteries

et al. 2021

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Porous silica-based materials are a promising alternative to graphite anodes for Li-ion batteries due to their high theoretical capacity, low discharge potential similar to pure silicon, superior cycling stability compared to silicon, abundance, and environmental friendliness. However, several challenges prevent the practical application of silica anodes, such as low coulombic efficiency and irreversible capacity losses during cycling. The main strategy to tackle the challenges of silica as an anode material has been developed to prepare carbon-coated SiO2 composites by carbonization in argon atmosphere. A facile and eco-friendly method of preparing carbon-coated SiO2 composites using sucrose is reported herein. The carbon-coated SiO2 composites were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetry, transmission and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, cyclic voltammetry, and charge–discharge cycling. A C/SiO2-0.085 M calendered electrode displays the best cycling stability, capacity of 714.3 mAh·g−1, and coulombic efficiency as well as the lowest charge transfer resistance over 200 cycles without electrode degradation. The electrochemical performance improvement could be attributed to the positive effect of the carbon thin layer that can effectively diminish interfacial impedance.

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Section: Introductionmentioning

confidence: 99%

Carbon-Coated SiO2 Composites as Promising Anode Material for Li-Ion Batteries

et al. 2021

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“…ChemistrySelect 27-1402) respectively. [10] Besides, an inapparent weak peak at around 23°can also be observed, which is relevant to the amorphous carbon including NC and HC derived from AF and RF according to Figure S3a.…”

Section: Chemistryselectmentioning

confidence: 90%

“…The inapparent broad reductive peak in the first cycle at 0.5-0.8 V corresponding to the formation of SEI layers indicates that side reaction about SEI layers is little and further illustrates the moderate interfacial stability between electrode and electrolyte. [10,16] In addition, the disappearance of this peak in the subsequent cycles means that stable SEI layers have been formed during the first cycle. In the following cycles, the reductive peak at around 0.15 V is attributed to the intercalation of Li + to amorphous Si.…”

Section: Chemistryselectmentioning

confidence: 99%

Silicon Nanoparticles Embedded in Nitrogen‐doped Hard Carbon Microspheres with a Double Carbon Matrix for Enhanced Cycling Performance of Lithium‐ion Batteries

Cao

Liu

et al. 2022

ChemistrySelect

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Limited by low electrical conductivity and huge volume changes in the process of lithium intercalation/de‐intercalation, the commercial application of Si‐based anode materials for lithium‐ion batteries is hindered. Herein, silicon nanoparticles embedded in nitrogen‐doped hard carbon microspheres composites (Si/NC@HC) were prepared by two‐step polymerization of 3‐aminophenol and resorcinol between formaldehyde and further carbonization. The formed double carbon matrix, including the inter NC microsphere and outer nanometer‐thick HC layer, can not only improve the electrical conductivity and silicon load but also ensure high structural stability to alleviate the volume effect of silicon effectively. Therefore, the obtained Si/NC‐2@HC possesses a high specific capacity of 1262.6 mAh g−1 after 300 cycles at the current density of 0.5 A g−1 with high silicon contents of 78 %, exhibiting excellent cycling performance. The novel synthesis method and structural design will provide a strategy for engineering Si‐based anode materials with high specific capacity and enhanced cycling performance.

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“…Nowadays, silica sand is the most widely used raw material for several high technology applications (Santos et al, 2015;Ashrafi-Shahri et al, 2019). It is a unique material for crystalline silicon manufacturing in panel construction (Dai et al, 2021), transparent silica glass (Chen et al, 2021), cement mixtures (Ramezanianpour et al, 2021) cement mortar, foundry materials (Kumar Sinha et al, 2021), corrosion protection (Ashrafi-Shahri et al, 2019), automotive engineering (sandblasting) (Cai et al, 2016), etc. Silica sand is one of the most important additive materials and it has been considered by many researchers.…”

Section: Introductionmentioning

confidence: 99%