Si@SiOx/graphene hydrogel composite anode for lithium-ion battery

Bai, Xuejun; Yu, Yueyang; Kung, Harold H.; Wang, Biao; Jiang, Jianming

doi:10.1016/j.jpowsour.2015.11.102

Cited by 140 publications

(56 citation statements)

References 53 publications

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“…The XPS full spectrum (Figure a) verifies that the Si/SiO 2 –OMC composite consists of Si, C, and O elements. The Si 2p spectrum (Figure b) contains two main peaks at 100.3 and 102.9 eV, corresponding to the presence of Si 0 and Si 4+ , respectively . Additionally, according to the XPS semi‐quantitative state analysis, it showed that the Si 4+ / Si molar ratio is about 0.86:1, indicating the SiO 2 / Si mass ratio is about 1.84:1.…”

Section: Resultsmentioning

confidence: 99%

“…Firstly, the carbon matrix contributes to providing good electronic conductivity of the electrode, preventing agglomeration of SiO x , and suppressing volume expansions of the active Si during cycling . Secondly, SiO 2 not only severs as a buffering layer to confine the volume change, but also plays a bonding role to enhance the interfacial adhesion between Si nanoparticles and the carbon matrix . In the case of the Si/SiC–OMC sample, SiC can be considered as a structural reinforcement backbone to couple with Si.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, Li 4 SiO 4 and LiO 2 were irreversibly formed during lithiation process, which consume much lithium and thus cause irreversible capacity loss to some extent. Fortunately, the generation of these oxides could act as buffer to accommodate the agglomeration the volume expansion caused by Si particles, in favor of the cycle ability of the electrode . The lithiation reaction of the Si/SiO 2 –OMC composite could be described by Equations .

true SiO_{2} + 4 Li^{+} + 4 normale^{-} \to Si + 2 Li_{2} normalO

true 2 SiO_{2} + 4 Li^{+} + 4 normale^{-} \to Li_{4} SiO_{4} + Si

true Si + x Li^{+} + x normale^{-} \vec{\leftarrow} Li_{x} Si

…”

Section: Resultsmentioning

confidence: 99%

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Preparation of a Si/SiO₂–Ordered‐Mesoporous‐Carbon Nanocomposite as an Anode for High‐Performance Lithium‐Ion and Sodium‐Ion Batteries

Ling

Liu

Han

et al. 2018

Chemistry A European J

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In this work, an Si/SiO -ordered-mesoporous carbon (Si/SiO -OMC) nanocomposite was initially fabricated through a magnesiothermic reduction strategy by using a two-dimensional bicontinuous mesochannel of SiO -OMC as a precursor, combined with an NaOH etching process, in which crystal Si/amorphous SiO nanoparticles were encapsulated into the OMC matrix. Not only can such unique porous crystal Si/amorphous SiO nanoparticles uniformly dispersed in the OMC matrix mitigate the volume change of active materials during the cycling process, but they can also improve electrical conductivity of Si/SiO and facilitate the Li /Na diffusion. When applied as an anode for lithium-ion batteries (LIBs), the Si/SiO -OMC composite displayed superior reversible capacity (958 mA h g at 0.2 A g after 100 cycles) and good cycling life (retaining a capacity of 459 mA h g at 2 A g after 1000 cycles). For sodium-ion batteries (SIBs), the composite maintained a high capacity of 423 mA h g after 100 cycles at 0.05 A g and an extremely stable reversible capacity of 190 mA h g was retained even after 500 cycles at 1 A g . This performance is one of the best long-term cycling properties of Si-based SIB anode materials. The Si/SiO -OMC composites exhibited great potential as an alternative material for both lithium- and sodium-ion battery anodes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

true SiO_{2} + 4 Li^{+} + 4 normale^{-} \to Si + 2 Li_{2} normalO

true 2 SiO_{2} + 4 Li^{+} + 4 normale^{-} \to Li_{4} SiO_{4} + Si

true Si + x Li^{+} + x normale^{-} \vec{\leftarrow} Li_{x} Si

…”

Section: Resultsmentioning

confidence: 99%

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Preparation of a Si/SiO₂–Ordered‐Mesoporous‐Carbon Nanocomposite as an Anode for High‐Performance Lithium‐Ion and Sodium‐Ion Batteries

Ling

Liu

Han

et al. 2018

Chemistry A European J

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“…[22][23][24][25] Furthermore, SiO x as a buffer to enhance the electrochemical performance of Si-based materials has attracted a lot of attention. [26][27][28][29] The existence of the amorphous the SiO x structure is favorable for providing good cycling stability, because the less active amorphous SiO x can effectively accommodate the large volume expansion of the Si during cycling. [27,[30][31][32] Simultaneously, a highly stable SEI can be formed on the surface of the amorphous SiO x , avoiding repeated formation of SEI film during cycles, which would lead to a decline in capacity.…”

Section: Introductionmentioning

confidence: 99%

A facile in situ synthesis of nanocrystal-FeSi-embedded Si/SiOx anode for long-cycle-life lithium ion batteries

Liang

Tian

et al. 2017

Energy Storage Materials

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A facile in situ synthesis of nanocrystal-FeSiembedded Si/SiO x anode for long-cycle-life lithium ion batteries, Energy Storage Materials, http://dx. AbstractA cost-effective, environmentally friendly and industrialized method of using low-grade sources to prepare high-performance anode material for lithium ion batteries (LIBs) with high energy density and long cycle life is both appealing and challenging. Herein, we present a low-cost, scalable and controllable approach for preparing unique sub-micrometer core-shell structure nanocrystal-FeSi-embedded Si/SiO x (FSO) anode material directly from a low-grade Fe-Si alloy. The sub-micrometer FSO anode materials are controlled by in-situ reaction of the Fe-Si-O in the Fe-Si alloy according to the phase diagram. The XRD and Rietveld refinement results indicate that when the treatment temperature increase, (i) FeSi phase appears together with Si and FeSi 2 , and then (ii)Fe 3 Si phase appears together with Si and FeSi. Most importantly, benefited from the formation of the amorphous SiO x as buffer layer and self-conductive nanocrystal-FeSi as a robust skeleton to mechanically support the large volume change of Si during cycling, the sub-micrometer core-shell structure FSO anode exhibits a high capacity (931.3 mAh g -1 ) at 50 mA g -1 and a prolonged cycle performance with 86% capacity retention over 1000 cycles at 1 A g -1 . The full cell with prelithiated FSO as the anode and commercial LiCoO 2 as the cathode delivers a high energy density of 467.5 Wh kg -1 at the 0.05 C. This work provides a promising route for commercial production of high-performance Si/SiO x -based anode materials in LIBs. Structure CharacterizationXRD measurements were performed with a Bruker D8 Advance powder diffractometer using CuKα sealed tube radiation (λ = 1.5418 Å) and Ni β-filter and equipped with LynxEye position sensitive detector. Rietveld refinement was conducted to determine the composition of the powders using Topas-5 software from Bruker. Thermogravimetric analysis (TGA) was carried out using a Perkin Elmer Diamond TG/DTA instrument at a heating rate of 10 o C min -1 under ambient conditions. X-ray photoelectron spectroscopy (XPS) measurements were carried out on an Axis Ultra DLD imaging photoelectron spectrometer. The samples were characterized by using scanning electron microscopy (FESEM and HR-SEM, Hitachi, S-4800) and transmission electron microscopy (TEM, FEI Ltd., Tecnai F20).

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“…A weak peak around 30° is related to the Si substrate. A very weak peak at 2θ=28.3° arises from the diffraction of (111) planes of Si substrate . Two broad peaks located at around 26° and 44° are observed in the XRD pattern of raw biocarbon, corresponding to the (002) and (100) planes of turbostratic carbon materials.…”

Section: Resultsmentioning

confidence: 99%

SiOx‐Modified Biocarbon Materials Derived from Shaddock Peel for Li–Ion Batteries

Deng

Xing

et al. 2019

ChemistrySelect

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SiOx‐modified porous biocarbon (C/SiOx), derived from shaddock peel through pyrolysis reaction, has been explored as an anode in rechargeable lithium batteries. The hierarchical structure endows the C/SiOx composites ultrahigh specific capacity and high electronic conductivity. After 100 cycles, a reversible capacity over 740 mAh⋅g−1 can be obtained at a current density of 0.358 A⋅g−1. An acceptable capacity of 82 mAh⋅g−1 can also be exhibited by withstanding a current density of 17.9 A⋅g−1. The study demonstrates that C/SiOx composites can be employed as a potential anode for advanced Li‐ion batteries.

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Si@SiOx/graphene hydrogel composite anode for lithium-ion battery

Cited by 140 publications

References 53 publications

Preparation of a Si/SiO₂–Ordered‐Mesoporous‐Carbon Nanocomposite as an Anode for High‐Performance Lithium‐Ion and Sodium‐Ion Batteries

Preparation of a Si/SiO₂–Ordered‐Mesoporous‐Carbon Nanocomposite as an Anode for High‐Performance Lithium‐Ion and Sodium‐Ion Batteries

A facile in situ synthesis of nanocrystal-FeSi-embedded Si/SiOx anode for long-cycle-life lithium ion batteries

SiOx‐Modified Biocarbon Materials Derived from Shaddock Peel for Li–Ion Batteries

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Si@SiOx/graphene hydrogel composite anode for lithium-ion battery

Cited by 140 publications

References 53 publications

Preparation of a Si/SiO2–Ordered‐Mesoporous‐Carbon Nanocomposite as an Anode for High‐Performance Lithium‐Ion and Sodium‐Ion Batteries

Preparation of a Si/SiO2–Ordered‐Mesoporous‐Carbon Nanocomposite as an Anode for High‐Performance Lithium‐Ion and Sodium‐Ion Batteries

A facile in situ synthesis of nanocrystal-FeSi-embedded Si/SiOx anode for long-cycle-life lithium ion batteries

SiOx‐Modified Biocarbon Materials Derived from Shaddock Peel for Li–Ion Batteries

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Preparation of a Si/SiO₂–Ordered‐Mesoporous‐Carbon Nanocomposite as an Anode for High‐Performance Lithium‐Ion and Sodium‐Ion Batteries

Preparation of a Si/SiO₂–Ordered‐Mesoporous‐Carbon Nanocomposite as an Anode for High‐Performance Lithium‐Ion and Sodium‐Ion Batteries