Porous Si/C/reduced graphene oxide microspheres by spray drying as anode for Li-ion batteries

Tao, Huachao; Xiong, Lingyun; Zhu, Shouchao; Zhang, Lulu; Yang, Xuelin

doi:10.1016/j.jelechem.2017.05.010

Cited by 53 publications

(36 citation statements)

References 32 publications

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“…Furthermore, The D/G intensity ratio can be used to measure the degree of defects in three carbon‐containing samples (Figure S6) . The highest value of 1.05 for Si@TiO 2 @GNRs implies the high disorder degree of Si@TiO 2 @GNRs . It reveals that the most of oxygen‐containing groups for the GNRs have been eliminated during the thermal reduction process according to the XPS analysis (Figure S7) and more defects were induced in the composite ,…”

Section: Resultsmentioning

confidence: 96%

Highly Porous Si Nanoframeworks Stabilized in TiO₂ Shells and Enlaced by Graphene Nanoribbons for Superior Lithium‐Ion Storage

et al. 2018

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To enhance the rate capability and cycling stability of Si‐based materials in lithium‐ion batteries, three‐dimensional graphene nanoribbons (GNRs) enlacing Si@TiO2 nanoparticles are synthesized by magnesiothermic reduction, sol‐gel and electrostatic adsorption processes. The rigid clamping layer of TiO2 on the surface of Si prevents the whole electrode from undergoing volumetric variation. GNRs act as bridges to interconnect the adjacent Si@TiO2 nanoparticles to form a successively conductive network with decreased inner resistance. Moreover, the effect of two other kinds of carbon resources (polydopamine and resorcinol formaldehyde) on the electrochemical performance of Si@TiO2 are also discussed. The Si@TiO2@GNRs composite shows an enhanced discharge capacity of 1295 mAh g−1 at a current density of 0.5 A g−1 in the 300th cycle and achieve an outstanding rate capacity of 689.3 mAh g−1 even at 10.0 A g−1. The design of the double protecting structure provides an alternative strategy to enhance the electrochemical performance of M‐based materials (M=Si, Sn, and Ge).

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Section: Resultsmentioning

confidence: 96%

Highly Porous Si Nanoframeworks Stabilized in TiO₂ Shells and Enlaced by Graphene Nanoribbons for Superior Lithium‐Ion Storage

et al. 2018

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“…It was noted that the combination of carbon and 3D GR can effectively improve the electrical conductivity of the composites and accommodate significant volume changes of Si during cycling . Tao et al introduced aerosol‐made 3D GR/Si/C microspheres using an aerosol process with subsequent carbonization with polyvinyl alcohol (PVA) as cross‐linking agent ( Figure a) . The fabricated aerosol‐made 3D GR/Si/C structure contained a buffer space for volume changes of Si during the charge and discharge process.…”

Section: Aerosol‐made 3d Graphene‐based Composites For Lithium Ion Bamentioning

confidence: 99%

“…They noted that dual carbon layers can effectively protect the Si core and improve the cycling stability of the electrode (Figure b). The 3D GR/Si/C microspheres used as anodes in LIBs exhibit a high reversible capacity of 928 mAh g −1 after 70 cycles at a current density of 0.1 A g −1 , good rate capability, and feasible cycling stability (Figure c) …”

Section: Aerosol‐made 3d Graphene‐based Composites For Lithium Ion Bamentioning

confidence: 99%

“…Electrochemical properties of the aerosol‐made 3D GR/Fe 3 O 4 and 3D GR/FeS composite powders: a) CV curves of the 3D GR/FeS composite, b) CV curves of aerosol‐made 3D GR/Fe 3 O 4 , c) 1st and 2nd charge and discharge curves, and d) cycling performances of the aerosol‐made 3D GR/Fe 3 O 4 composite. Reproduced with permission . Copyright 2017, Elsevier.…”

Section: Aerosol‐made 3d Graphene‐based Composites For Lithium Ion Bamentioning

confidence: 99%

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High Potential of Aerosol‐Made 3D Graphene‐Based Composites for Enhanced Energy Storage

Kim

Lee

et al. 2019

Macromol. Rapid Commun.

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another very important type of advanced energy storage system, and they are highly useful and promising devices for related storage purposes. [6] Batteries that maintain high energy density levels, high operability, and long cycling lifetimes are regarded as the most promising power source for portable devices and electric vehicles. [7] Typical batteries consist of an anode, a cathode, an electrolyte, and a separator. [8] The performance of these electrochemical energy conversion or storage systems is highly dependent on the properties of the active electrode material. Graphene (GR), a flat single layer of sp 2 -bonded single carbon atoms, has recently attracted strong interest as the most promising active electrode material due to its high specific surface area, high thermal conductivity, excellent mechanical rigidity, fast electronic transport, high optical transparency, and other useful properties. [9,10] However, conventionally prepared GRs by the liquid-phase reaction are formed mostly as 2D layered GR sheets and tend randomly or easily to aggregate, repackage, and restack by means of π-π stacking and van der Waals attraction. [11,12] The random stacking of GR sheets reduces the specific surface area and thus decreases the electrochemical performance. [11,12] To overcome these drawbacks of random stacking of GR, many researchers have studied 3D GR for energy storage systems by various liquid-phase, freeze-drying methods, and so on. In previous studies, Qu et al. introduced GR-polyaniline (PANI) composites by hydrothermal for high-rate performance in supercapacitors. [13] Xu et al. produced 3D porous GR and metal-organic framework composites by freeze-drying, which showed a good rate capability with high specific capacitances. [14] Zhang et al. also showed metal-organic framework/GR composite fibers by wet-spinning and as-prepared composites indicated high electrochemical performance. [15] However, the above methods are time-consuming and disadvantageous in that the control of shape is difficult. The fabrication of 3D GR by an aerosol process is considered as a highly promising type of platform technology with many advantages to solve problems of previous methods. The aerosol process is advantageous to fabricate various composites in less than a few minutes with certain compositions of colloidal precursor solutions that contain GO and any type of dissolved metal-based compound. [16][17][18] Figure 1 shows a schematic illustration of various 3D GR-based composites formed from a graphene oxide (GO) and component colloidal mixture by an aerosol process. Various aerosol-made 3D Graphene CompositesRecently, many researchers have developed advanced energy storage and energy conversion systems to address the increased demand for energy resources. The performance of these electrochemical energy storage and conversion devices depends considerably on the properties of their unique electrode materials. Among electrode materials, graphene (GR) has attracted much attention due to its unique properties of high flexibility,...

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“…Tao's group [ 84 ] have prepared porous Si/C/reduced graphene oxide (Si/C/rGO) microspheres by the spray drying and subsequent carbonization process using polyvinyl alcohol (PVA) as cross-linking agent. The designed micrometre-size reduced graphene oxide wrapped Si/C ball structure offers a buffer space for the volume change of Si during the charge–discharge process.…”

Section: Modification Of Silicon–carbon Anode Materialsmentioning

confidence: 99%

Solutions for the problems of silicon–carbon anode materials for lithium-ion batteries

Liu¹,

Zhu²,

Pan³

2018

R. Soc. open sci.

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Lithium-ion batteries are widely used in various industries, such as portable electronic devices, mobile phones, new energy car batteries, etc., and show great potential for more demanding applications like electric vehicles. Among advanced anode materials applied to lithium-ion batteries, silicon–carbon anodes have been explored extensively due to their high capacity, good operation potential, environmental friendliness and high abundance. Silicon–carbon anodes have demonstrated great potential as an anode material for lithium-ion batteries because they have perfectly improved the problems that existed in silicon anodes, such as the particle pulverization, shedding and failures of electrochemical performance during lithiation and delithiation. However, there are still some problems, such as low first discharge efficiency, poor conductivity and poor cycling performance, which need to be improved. This paper mainly presents some methods for solving the existing problems of silicon–carbon anode materials through different perspectives.

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Porous Si/C/reduced graphene oxide microspheres by spray drying as anode for Li-ion batteries

Cited by 53 publications

References 32 publications

Highly Porous Si Nanoframeworks Stabilized in TiO₂ Shells and Enlaced by Graphene Nanoribbons for Superior Lithium‐Ion Storage

Highly Porous Si Nanoframeworks Stabilized in TiO₂ Shells and Enlaced by Graphene Nanoribbons for Superior Lithium‐Ion Storage

High Potential of Aerosol‐Made 3D Graphene‐Based Composites for Enhanced Energy Storage

Solutions for the problems of silicon–carbon anode materials for lithium-ion batteries

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Porous Si/C/reduced graphene oxide microspheres by spray drying as anode for Li-ion batteries

Cited by 53 publications

References 32 publications

Highly Porous Si Nanoframeworks Stabilized in TiO2 Shells and Enlaced by Graphene Nanoribbons for Superior Lithium‐Ion Storage

Highly Porous Si Nanoframeworks Stabilized in TiO2 Shells and Enlaced by Graphene Nanoribbons for Superior Lithium‐Ion Storage

High Potential of Aerosol‐Made 3D Graphene‐Based Composites for Enhanced Energy Storage

Solutions for the problems of silicon–carbon anode materials for lithium-ion batteries

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Product

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Highly Porous Si Nanoframeworks Stabilized in TiO₂ Shells and Enlaced by Graphene Nanoribbons for Superior Lithium‐Ion Storage

Highly Porous Si Nanoframeworks Stabilized in TiO₂ Shells and Enlaced by Graphene Nanoribbons for Superior Lithium‐Ion Storage