Highly Ordered Mesoporous Si/C Nanocomposite as High Performance Anode Material for Li-ion Batteries

Yiping, Tang; Yuan, Sha; Guo, Yuzhong; Huang, Ruian; Wang, Jianhua; Yang, Bin; Dai, Yongnian

doi:10.1016/j.electacta.2016.03.085

Cited by 33 publications

(7 citation statements)

References 30 publications

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“…The textural characteristics of the samples were evaluated through N 2 ADI measurements. As shown in Figure 5a, nc-Si and AC<nc-Si>AC exhibited a typical mesoporous characteristic with the type-IV isotherm [59]. However, AC showed a type-H4 hysteresis loop with the type-II/IV bimodal sorption isotherm characteristic, representing a coexistence of micro- (≤2 nm), meso- (2–50 nm), and macro-pores (≥50 nm) in the material [60,61].…”

Section: Resultsmentioning

confidence: 99%

“…Namely, such an encapsulation of nc-Si by AC could effectively suppress the undesired reaction (i.e., Li–Si alloying behavior) at the nc-Si surface, while the electron diffusion could be enhanced due to the existence of mesoporous nc-Si [17,73,74]. Three potential plateaus (0.3, 0.5, and 0.8 V) in the first discharge cycle were believed to result from the SEI layer formation and the lithiation of amorphous Li x Si and Si [15,16,59].…”

Section: Resultsmentioning

confidence: 99%

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Activated Carbon-Decorated Spherical Silicon Nanocrystal Composites Synchronously-Derived from Rice Husks for Anodic Source of Lithium-Ion Battery

Lee

et al. 2019

Nanomaterials

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The nanocomposites of activated-carbon-decorated silicon nanocrystals (AC<nc-Si>AC) were synchronously derived in a single step from biomass rice husks, through the simple route of the calcination method together with the magnesiothermic reduction process. The final product, AC<nc-Si>AC, exhibited an aggregated structure of activated-carbon-encapsulated nanocrystalline silicon spheres, and reveals a high specific surface area (498.5 m2/g). Owing to the mutualization of advantages from both silicon nanocrystals (i.e., low discharge potential and high specific capacity) and activated carbon (i.e., high porosity and good electrical conductivity), the AC<nc-Si>AC nanocomposites are able to play a substantial role as an anodic source material for the lithium-ion battery (LIB). Namely, a high coulombic efficiency (97.5%), a high discharge capacity (716 mAh/g), and a high reversible specific capacity (429 mAh/g after 100 cycles) were accomplished when using AC<nc-Si>AC as an LIB anode. The results advocate that the simultaneous synthesis of biomass-derived AC<nc-Si>AC is beneficial for green energy-storage device applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Activated Carbon-Decorated Spherical Silicon Nanocrystal Composites Synchronously-Derived from Rice Husks for Anodic Source of Lithium-Ion Battery

Lee

et al. 2019

Nanomaterials

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“…Besides, the etch of Si-based alloys 15 and the synthesis of porous structures from the magnesiothermic reduction procedure 16 are also effective pathways for the preparation of nanoscale Si-based anode material. Among these nanosized designs, preparing Si-based porosint is considered as an extremely effective method, 17 which avoids the common serious aggregation problem of less than 100 nm ultrafine powders. 18 Furthermore, this porosity conformation can afford abundant buffer space to assimilate the big volume changes and therefore can improve the cycle stability.…”

Section: Introductionmentioning

confidence: 99%

Cornlike Ordered Mesoporous Silicon Particles Modified by Nitrogen-Doped Carbon Layer for the Application of Li-Ion Battery

Lü

Deng

et al. 2017

ACS Appl. Mater. Interfaces

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The cornlike ordered mesoporous silicon (OM-Si) particles modified by the nitrogen-doped carbon layer (OM-Si@NC) are successfully fabricated and used as the anode of lithium-ion battery (LIBs). The influences of the N-doped carbon layer on the structure and electrochemical properties of the OM-Si@NC composite are detailedly investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectrum, X-ray photoelectron spectroscopy (XPS), and charge/discharge tests. The results reveal that the amorphous N-doped carbon layer can offer the abundant conductive pathways for fast lithium ion transportation and electron transfer, which not only leads to a high specific capacity under high ampere density but also serves as a structural barrier maintaining the whole integrity and settling the mechanical breaking due to the huge volume changes of Si host. Therefore, the as-synthesized OM-Si@NC composite exhibits a high original discharge capacity of 2548 mA h g under 0.2 A g as well as a large reversible capacity of 1336 mA h g under 1 A g after 200 circles. The OM-Si@NC composite prepared by a relatively simple and feasible synthesis method shows excellent electrochemical performances and turns out to be promising for the application of high power LIBs.

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“…OM-Si: Silicon holds a promise as a candidate material to undergo electrochemical alloying reactions with lithium due to its excellent theoretical capacity (3579 mA h g −1 ), its spontaneous abundance, and its environmental friendliness. [126][127][128] However, the development of practical silicon anodes has been restricted because the high Li-storage capacity of silicon is linked to large (>300%) volume changes, making for pulverization and cracking of the active silicon material. Cook et al [129] reported a valuable method to improve the properties of mesoporous silicon, in which the pore size was controlled.…”

Section: Other Ommsmentioning

confidence: 99%

The State of Research Regarding Ordered Mesoporous Materials in Batteries

Zheng

et al. 2019

Small

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kineticreactions. [7][8][9][10] Comparatively speaking, mesopores are more favorable for the transport of reactants or solvents. On the contrary, macropores are too large for common reactants or solvents to be very effective. But if the micropores or macropores are combined with mesopores, the shortcomings will get balanced in a sense because the micropores may enable superior cycle stability and the macropores can promise rapid ion transport when they are employed with mesopores together. Ordered mesoporous materials are generally divided into two kinds: ordered mesoporous siliconbased materials and ordered mesoporous nonsilicon materials. Some ordered mesoporous nonsilicon materials, such as ordered mesoporous metallic materials, nonmetallic materials, ordered mesoporous carbon (OMC)-based materials, and reduced graphene oxide (rGO)-based materials, have aroused widespread interest, among which OMC-based metal composites and metal oxide materials are in the spotlight. [11][12][13] Consequently, OMCbased materials and their applications in various batteries have gradually become popular topics in research (Figure 1a). The rich pore structure and high specific surface area of OMCs are not only beneficial to reactants and product diffusion but also enable the material to incorporate highly dispersed metal nanoparticles. [14][15][16][17] Due to their surface and physicochemical properties, OMCs can easily be subjected to functional group modification or heteroatom doping, thus enhancing the physical and chemical properties of the material. These two points have led to the increasing application of OMC-based materials in electrochemistry.Although the selection of materials is an extremely important aspect, the various types of batteries also have their own advantages and disadvantages. As research progresses, different types of materials have also been applied to various types of batteries to fulfill their potential. [18] Rechargeable lithium-ion batteries (LIBs) play substantial roles in electrochemical energy storage for their advantages of no memory effect, long life cycle, high energy density, and low toxicity, so they are often deemed as clean and renewable sources of energy. [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] However, because of the energy-density limitations of LIBs, such batteries cannot meet the current intensive energy demand. It may be hard for LIBs to satisfy the needs for sufficient power density, high energy density, and long service life in some fields, such as electrical vehicles (hybrid electric Ordered mesoporous materials, porous materials with a pore size of 2-50 nm which are prepared via the sol-gel process using surfactant molecular aggregates as a template to assemble channels through the interfacial action of organic and inorganic substances, have recently triggered a heated debate. In addition to applications in the catalytic cracking of heavy oils and residues, the manufacturing of graft materials, the purification of water, the conversion of automobile exhaust...

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Highly Ordered Mesoporous Si/C Nanocomposite as High Performance Anode Material for Li-ion Batteries

Cited by 33 publications

References 30 publications

Activated Carbon-Decorated Spherical Silicon Nanocrystal Composites Synchronously-Derived from Rice Husks for Anodic Source of Lithium-Ion Battery

Activated Carbon-Decorated Spherical Silicon Nanocrystal Composites Synchronously-Derived from Rice Husks for Anodic Source of Lithium-Ion Battery

Cornlike Ordered Mesoporous Silicon Particles Modified by Nitrogen-Doped Carbon Layer for the Application of Li-Ion Battery

The State of Research Regarding Ordered Mesoporous Materials in Batteries

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