Tunable construction of multi-shell hollow SiO2 microspheres with hierarchically porous structure as high-performance anodes for lithium-ion batteries

Ma, Xiaoming; Wei, Zipeng; Han, Huijuan; Wang, Xiaobing; Cui, Kaiqing; Yang, Lin

doi:10.1016/j.cej.2017.04.108

Cited by 84 publications

(39 citation statements)

References 35 publications

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“…Figure a,b shows the FTIR spectra and XRD patterns of the S/C composites with different HF/TEOS ratio, respectively. Characteristic peaks around 470, 800, and 1100 cm −1 in the FTIR can be assigned to the tetrahedral bending modes of Si‐O‐Si, Si‐O‐Si symmetric stretching vibrations, and Si‐O‐Si asymmetric stretching vibrations, respectively, demonstrating the successful formation of SiO 2 phase in all samples . In the XRD patterns, the broad peak located at 22° is associated with amorphous SiO 2 and carbon, while the weak peak around 44° can be assignable to amorphous carbon .…”

Section: Resultsmentioning

confidence: 82%

“…Fortunately, the much simpler preparation procedure and structure design of synthetic SiO 2 compared with that of Si offer us the possibility to develop a well‐defined form of SiO 2 for LIBs application . The most common method is reducing the SiO 2 size to a nanoscale range and coupling it with carbon materials, which can minimize the Li + migrating path and enhance the conductivity of the electrodes, respectively. For example, An prepared carbon‐coated mesoporous hollow SiO 2 nanospheres via a two‐step method.…”

Section: Introductionmentioning

confidence: 99%

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Silica/Carbon Composites with Controllable Nanostructure from a Facile One‐Step Method for Lithium‐Ion Batteries Application

Yang

Zhang

et al. 2019

Adv Materials Inter

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capacity of 1965 mAh g −1 . [7,8] What's more, the silicate and Li 2 O produced during the lithium storage process are advantageous to buffer the volume change, thus enhancing the cycling stability of the electrodes. [5,9] However, the intrinsic drawbacks of low electrical conductivity and high ion-migrating resistivity in bulk SiO 2 restrict its application in LIBs greatly. [4,[9][10][11] Fortunately, the much simpler preparation procedure and structure design of synthetic SiO 2 compared with that of Si offer us the possibility to develop a well-defined form of SiO 2 for LIBs application. [4,10] The most common method is reducing the SiO 2 size to a nanoscale range and coupling it with carbon materials, [6][7][8][9][10][11][12][13] which can minimize the Li + migrating path and enhance the conductivity of the electrodes, respectively. For example, An [7] prepared carbon-coated mesoporous hollow SiO 2 nanospheres via a two-step method. The results showed that the carbon shell could endure the volume expansion of SiO 2 and stabilize the solid electrolyte interface (SEI) film, thus giving rise to a larger reversible capacity of 440.7 mAh g −1 and perfect cycling ability. Meng [6] designed a kind of 3D amorphous SiO 2 @graphene aerogel through a hydrothermal method, and it delivered a specific capacity of 300 mAh g −1 , excellent cycling stability, and good rate capability, which were ascribed to the 3D nanostructure and the coupling of graphene.Nevertheless, to our knowledge, these strategies can be classified into two types: two-step method by preparing nanoscale SiO 2 particles and then coupling them with carbon frameworks [4,[6][7][8][9][10] ; electrospinning method or hydrothermal method by mixing the silica source (such as TEOS and tetramethoxysilane) with carbon source in a homogeneous solution. [11,12] These strategies exhibit obvious defects: 1) tedious and time-consuming procedures in two-step methods; 2) inhomogeneous nanostructure: carbon layers may stack into carbon bulks during the dipping-carbonizing process, and the inside SiO 2 particles tend to aggregate into larger particles at a relatively high SiO 2 content; 3) limitation of the performance optimization owing to the uncontrollable nanostructure.Therefore, in this work, we develop a new class of porous silica/carbon (S/C) composites with controllable nanostructure via a mild one-step sol-gel method (Figure 1). This idea comes from a well-known mechanism that hydrofluoric acid (HF) can Nanosized silica is drawing attentions in lithium-ion batteries because of its better cycling stability and lower cost compared to silicon. However, significant challenges appear at the uncontrollable and inhomogeneous nanostructure while coupling silica with carbon. Herein, a series of silica/carbon (S/C) composites with tunable nanostructure are developed based on the mechanism that hydrofluoric acid (HF) can control the gelating process of tetraethylorthosilicate (TEOS). By changing the HF/TEOS ratio, the size of the silica skeleton, surface area and porosity of...

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Section: Resultsmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Silica/Carbon Composites with Controllable Nanostructure from a Facile One‐Step Method for Lithium‐Ion Batteries Application

Yang

Zhang

et al. 2019

Adv Materials Inter

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“…MHSM as anode material delivered high capacity 750 mA h g −1 at current 0.1 A g −1 after 500 cycles. MHSM exhibited excellent cycling stability because of a porous structure which provides the easy reaction among the lithium ion and anode material and reduced the reaction path (Ma et al, 2017b ). Further, three-dimensional (3D) macroporous silicon was synthesized by magnesiothermic reduction to enhance structure stability, capacity and cycle life of Si anode as shown in Figure 2 .…”

Section: Applications Of Silicon-based Porous Nanomaterialsmentioning

confidence: 99%

Section: Applications Of Silicon-based Porous Nanomaterialsmentioning

confidence: 99%

Big Potential From Silicon-Based Porous Nanomaterials: In Field of Energy Storage and Sensors

et al. 2018

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Silicon nanoparticles (SiNPs) are the promising materials in the various applications due to their unique properties like large surface area, biocompatibility, stability, excellent optical and electrical properties. Surface, optical and electrical properties are highly dependent on particle size, doping of different materials and so on. Porous structures in silicon nanomaterials not only improve the specific surface area, adsorption, and photoluminescence efficiency but also provide numbers of voids as well as the high surface to volume ratio and enhance the adsorption ability. In this review, we focus on the significance of porous silicon/mesoporous silicon nanoparticles (pSiNPs/mSiNPs) in the applications of energy storage, sensors and bioscience. Silicon as anode material in the lithium-ion batteries (LIBs) faces a huge change in volume during charging/discharging which leads to cracking, electrical contact loss and unstable solid electrolyte interphase. To overcome challenges of Si anode in the LIBs, mSiNPs are the promising candidates with different structures and coating of different materials to enhance electrochemical properties. On the basis of optical properties with tunable wavelength, pSiNPs are catching good results in biosensors and gas sensors. The mSiNPs with different structures and modified surfaces are playing an important role in the detection of biomarkers, drug delivery and diagnosis of cancer and tumors.

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“…In order to circumvent these intrinsic limitations, two mainstream strategies have been proposed, i.e., design of nanostructures and compositing with high conductive carbon or other materials. For the former one, various nanostructured SiO 2 such as nanofilms [16], nanocubes [17], nanospheres [18,19], nanotubes [20], and nanoparticles [21] have been successfully synthesized. This strategy greatly shortens the lithium ion and electron transport paths and increases the contact area between electrodes and electrolytes, and thus improves the electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Core-Shell Structured SiO2@Carbon Composite Nanorods for High-Performance Lithium-Ion Batteries

Pang

Zhang

et al. 2020

Nanomaterials

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Recently, SiO2 has attracted wide attention in lithium-ion batteries owing to its high theoretical capacity and low cost. However, the utilization of SiO2 is impeded by the enormous volume expansion and low electric conductivity. Although constructing SiO2/carbon composite can significantly enhance the electrochemical performance, the skillful preparation of the well-defined SiO2/carbon composite is still a remaining challenge. Here, a facile strategy of in situ coating of polydopamine is applied to synthesis of a series of core-shell structured SiO2@carbon composite nanorods with different thicknesses of carbon shells. The carbon shell uniformly coated on the surface of SiO2 nanorods significantly suppresses the volume expansion to some extent, as well as improves the electric conductivity of SiO2. Therefore, the composite nanorods exhibit a remarkable electrochemical performance as the electrode materials of lithium-ion batteries. For instance, a high and stable reversible capacity at a current density of 100 mA g−1 reaches 690 mAh g−1 and a capacity of 344.9 mAh g−1 can be achieved even at the high current density of 1000 mA g−1. In addition, excellent capacity retention reaches 95% over 100 cycles. These SiO2@carbon composite nanorods with decent electrochemical performances hold great potential for applications in lithium-ion batteries.

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Tunable construction of multi-shell hollow SiO2 microspheres with hierarchically porous structure as high-performance anodes for lithium-ion batteries

Cited by 84 publications

References 35 publications

Silica/Carbon Composites with Controllable Nanostructure from a Facile One‐Step Method for Lithium‐Ion Batteries Application

Silica/Carbon Composites with Controllable Nanostructure from a Facile One‐Step Method for Lithium‐Ion Batteries Application

Big Potential From Silicon-Based Porous Nanomaterials: In Field of Energy Storage and Sensors

Facile Synthesis of Core-Shell Structured SiO2@Carbon Composite Nanorods for High-Performance Lithium-Ion Batteries

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