Effect of oxidation on Li-ion secondary battery with non-stoichiometric silicon oxide (SiO ) nanoparticles generated in cold plasma

Kim, Kwangsu; Park, Jin-Hwan; Doo, Seok‐Gwang; Kim, T.

doi:10.1016/j.tsf.2010.03.176

Cited by 39 publications

(22 citation statements)

References 17 publications

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“…The main electrochemical reactions reported in the literature for the lithiation of SiO 2 (Eqs. (1)e(3)) [4,6,34,35] are based on the formation of Li 2 O and lithium silicate compounds (Li 4 SiO 4 ) along with Si (Eqs. (1) and (2)).…”

Section: Methodsmentioning

confidence: 99%

Eco-friendly synthesis of SiO2 nanoparticles confined in hard carbon: A promising material with unexpected mechanism for Li-ion batteries

Niță

Fullenwarth

Monconduit

et al. 2019

Carbon

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A fast, simple and environmentally friendly one-pot route to obtain carbon/SiO 2 hybrid materials is reported in this work. This consists in simple mixture of carbon and silica precursors, followed by thermal annealing at different temperatures. An interpenetrating hybrid network composed of hard carbon and amorphous SiO 2 nanoparticles (2e5 nm) homogeneously distributed was achieved. Increasing the annealing temperature from 600 C up to 1200 C, the material porosity and oxygen functional groups are gradually removed, while the amorphous nature of SiO 2 is conserved. This allows to diminish the irreversible capacity during the first charge-discharge cycle and to increase the reversible capacity. An excellent cycling capability, with a reversible capacity up to 535 mA hg-1 at C/5 constant current rate was obtained for C/SiO 2 materials used as anodes for Li-ion batteries. An atypical increase of the capacity during the first 50 cycles followed by a stable plateau up to 250 cycles was observed and related to electrolyte wettability limitation through the materials, particularly for those annealed at high temperatures which are more hydrophobic, less porous and the SiO 2 nanoparticles less accessible. The SiO 2 lithiation mechanism was evaluated by XRD, TEM and XPS post-mortem analyses and revealed the formation of reversible lithium silicate phases.

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Section: Methodsmentioning

confidence: 99%

Eco-friendly synthesis of SiO2 nanoparticles confined in hard carbon: A promising material with unexpected mechanism for Li-ion batteries

Niță

Fullenwarth

Monconduit

et al. 2019

Carbon

View full text Add to dashboard Cite

show abstract

“…7,8 Kim et al used inductively coupled plasma to investigate the effect of oxidation on the silicon oxide based anode and recommended the reduction of oxygen concentration below 18 atom % in order to increase the initial capacity. 9 Abel et al designed partially oxidized (≈13 atom % O) nano-structured silicon thin films that produced a high capacity of approximately 2200 mAh/g, which was reversibly cycled for 120 rounds with practically no capacity fade and 80% of the initial reversible capacity was retained after 300 cycles. 10 Although several experimental studies were conducted in order to improve the quality of the silicon-suboxide anode material, an in-depth atomic-scale understanding of the interactions, bonding mechanism, energetic, diffusivity, mixture formations and their lithiation behavior is necessary for the rational design of silicon suboxide based anodes.…”

Section: Introductionmentioning

confidence: 99%

A first-principles study on the effect of oxygen content on the structural and electronic properties of silicon suboxide as anode material for lithium ion batteries

Rahaman

Mortazavi

Rabczuk

2016

Journal of Power Sources

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Silicon suboxide is currently considered as a unique candidate for lithium ion batteries anode materials due to its considerable capacity. However, no adequate information exist about the role of oxygen content on its performance. To this aim, we used density functional theory to create silicon suboxide matrices of various Si:O ratios and investigated the role of oxygen content on the structural, dynamic, electronic properties and lithiation behavior of the matrices. Our study demonstrates that the O atoms interact strongly with the inserted Li atoms resulting in a disintegration of the host matrix. We found that higher concentration of oxygen atoms in the mixture reduces its relative expansion upon lithiation, which is a desirable quality for anode materials. It helps in preventing crack formation and pulverization due to large fluctuations in volume. Our study also demonstrate that a higher oxygen content increases the lithium storage capacity of the anode. However, it can also cause the formation of stable complexes like lithium silicates that might result into reversible capacity loss as indicated by the voltage-composition curves. The study provides valuable insights into the role of oxygen in moderating the interaction of lithium in silicon suboxide mixture in microscopic details.

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“…Besides optoelectronic devices [ 1 , 2 ], silicon nanoparticles are envisioned for a much broader range of applications, especially if they can be processed by printing techniques. Future generations of lithium-ion batteries might rely on printable silicon nanoparticles as a part of the electrode setup, boosting the battery's capacity [ 3 , 4 ]. Furthermore, their potential in photovoltaics is shifting into the focus of interest.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of mid-sized silicon nanoparticles by functionalization with acrylic acid

et al. 2012

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We present an enhanced method to form stable dispersions of medium-sized silicon nanoparticles for solar cell applications by thermally induced grafting of acrylic acid to the nanoparticle surface. In order to confirm their covalent attachment on the silicon nanoparticles and to assess the quality of the functionalization, X-ray photoelectron spectroscopy and diffuse reflectance infrared Fourier spectroscopy measurements were carried out. The stability of the dispersion was elucidated by dynamic light scattering and Zeta-potential measurements, showing no sign of degradation for months.

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Effect of oxidation on Li-ion secondary battery with non-stoichiometric silicon oxide (SiO ) nanoparticles generated in cold plasma

Cited by 39 publications

References 17 publications

Eco-friendly synthesis of SiO2 nanoparticles confined in hard carbon: A promising material with unexpected mechanism for Li-ion batteries

Eco-friendly synthesis of SiO2 nanoparticles confined in hard carbon: A promising material with unexpected mechanism for Li-ion batteries

A first-principles study on the effect of oxygen content on the structural and electronic properties of silicon suboxide as anode material for lithium ion batteries

Stabilization of mid-sized silicon nanoparticles by functionalization with acrylic acid

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