Facile electrostatic self-assembly of silicon/reduced graphene oxide porous composite by silica assist as high performance anode for Li-ion battery

Wang, Mingshan; Wang, Zhiqiang; Jia, Ran; Yang, Yi; Zhu, Fang-Yu; Yang, Zhenliang; Huang, Yun; Li, Xing; Xu, Wu

doi:10.1016/j.apsusc.2018.06.147

Cited by 59 publications

(28 citation statements)

References 55 publications

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“…Electrochemical There are two strategies to avoid this problem. The first is combining Si with different kinds of carbon materials such as amorphous carbon [25][26][27], conductive carbon black [28], carbon nanotubes [29,30], and graphene [31][32][33], and the second is by designing nanoscale silicon with different structures. Currently, extensive research has been carried out to develop nanostructures of silicon i.e., silicon nanoparticles [27,34,35], silicon nanowires/nanotubes [36][37][38], nanosheets [38,39], and 3D porous structures [40,41].…”

Section: Figurementioning

confidence: 99%

Nanostructured Silicon as Potential Anode Material for Li-Ion Batteries

et al. 2020

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Commercial micrometer silicon (Si) powder was investigated as a potential anode material for lithium ion (Li-ion) batteries. The characterization of this powder showed the mean particle size of approx.75.2 nm, BET surface area of 10.6 m2/g and average pore size of 0.56 nm. Its band gap was estimated to 1.35 eV as determined using UV-Vis diffuse reflectance spectra. In order to increase the surface area and porosity which is important for Li-ion batteries, the starting Si powder was ball-milled and threatened by metal-assisted chemical etching. The mechanochemical treatment resulted in decrease of the particle size from 75 nm to 29 nm, an increase of the BET surface area and average pore size to 16.7 m2/g and 1.26 nm, respectively, and broadening of the X-ray powder diffraction (XRD) lines. The XRD patterns of silver metal-assisted chemical etching (MACE) sample showed strong and narrow diffraction lines typical for powder silicon and low-intensity diffraction lines typical for silver. The metal-assisted chemical etching of starting Si material resulted in a decrease of surface area to 7.3 m2/g and an increase of the average pore size to 3.44 nm. These three materials were used as the anode material in lithium-ion cells, and their electrochemical properties were investigated by cyclic voltammetry and galvanostatic charge-discharge cycles. The enhanced electrochemical performance of the sample prepared by MACE is attributed to increase in pore size, which are large enough for easy lithiation. These are the positive aspects of the application of MACE in the development of an anode material for Li-ion batteries.

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Section: Figurementioning

confidence: 99%

Nanostructured Silicon as Potential Anode Material for Li-Ion Batteries

et al. 2020

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“…In the middle of recognition of phenomenal dispersed phase, NPs (silica -SiO 2 ) decorated graphene has been greatly recommended, inspiring from its advantageous features [5]. This nanohybrid has been successfully implemented in miscellaneous areas, like bio-medical application [6], liquid puri cation [7], anti-corrosion hydrophobic coating [8], Li-ion battery [9], biosensor [10], etc. However, from the best of our knowledge, there is no report concerning the development of nanocomposite membrane structures with the incorporation of this particular hybridized nanosheet for the separation of gases.…”

Section: Introductionmentioning

confidence: 99%

Insight on to Mechanical, Thermal, Long-Term, Hydrothermal, and Chemical Stability of PSf Based Membrane Systems for Separation of O2 /N2

Swain

Unnikrishnan²,

Mohanty³

et al. 2021

Preprint

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MMMs have been opened up a new window in gas separation and purification applications, but the actual viability can be reckoned on the basis of performance achieved in realistic feed conditions. This research highlights the selection of silica decorated graphene for the first time to prepare nanocomposite membranes. In the study, XRD, Raman, and UV validated the existence of the different fillers within the host Polysulfone (PSf), while TEM authenticated their distribution. The burst strength and thermal properties were also investigated. Besides, it covered a prudent step towards resolving the dominant ingredients, which routinely appraise the stability and durability of the membranes. These indexes are long-term gas permeation up to 120 hours coupled with sustainability against hydrothermal and chemical resistance under various conditions similar to real-life separation applications. Finally, the report demonstrated that the nanohybrid integrated membrane systems displayed optimum separation performance and stability than their parent counterparts: PSf/mSiO2, PSf/GO.

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“…In this context, silicon nanoparticles [6,7], silicon nanowires/nanotubes [8][9][10], nanosheets [11][12][13], nanofilms [14], and 3D porous structures [15,16] have been intensely studied to improve the anode performance significantly. At the same time, extensive research has been carried out to combine the silicon nanostructures with different carbon materials [17,18] such as amorphous carbon [19], conductive carbon black [20], carbon nanotubes [21], and graphene [22,23]. The insertion of metal nanoparticles has been also explored in terms of surface modification of the Si nanostructure to improve overall performance, particularly coulombic efficiency and power capability [24,25].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Characterization of Cu-Catalysed Si Nanowires as an Anode for Lithium-Ion Cells

Prosini

Rondino

Moreno

et al. 2020

Journal of Nanomaterials

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Silicon (Si) nanowires (NWs) grown on stainless-steel substrates by Cu-catalysed Chemical Vapour Deposition (CVD) have been prepared to be used as anodes in lithium-ion batteries. The use of NWs can overcome the problems related to the Si volume changes occurring during lithium alloying by reducing stress relaxation and preventing material fragmentation. Moreover, since the SiNWs are grown directly on the substrate, which also acts as a current collector, an excellent electrical contact is generated between the two materials without the necessity to use additional binders or conducting additives. The electrochemical performance of the SiNWs was tested in cells using lithium metal as the anode. A large irreversible capacity was observed during the first cycle and, to a lesser extent, during the second cycle. All the subsequent cycles showed good reversibility even if the coulombic efficiency did not exceed 95%, suggesting the formation of an unstable SEI film and a continuous decomposition of the electrolyte on the silicon surface. The absence of a stable SEI film was assumed responsible for a linear capacity fade observed upon cycling. On the other hand, the electrochemical characterization performed at different values of the charging current showed that SiNWs possess an exceptionally high rate capability.

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Facile electrostatic self-assembly of silicon/reduced graphene oxide porous composite by silica assist as high performance anode for Li-ion battery

Cited by 59 publications

References 55 publications

Nanostructured Silicon as Potential Anode Material for Li-Ion Batteries

Nanostructured Silicon as Potential Anode Material for Li-Ion Batteries

Insight on to Mechanical, Thermal, Long-Term, Hydrothermal, and Chemical Stability of PSf Based Membrane Systems for Separation of O2 /N2

Electrochemical Characterization of Cu-Catalysed Si Nanowires as an Anode for Lithium-Ion Cells

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