A silicon-containing nanocomposite for a thin-film lithium-ion battery

Berdnikov, A. E.; Gerashchenko, V. N.; Gusev, V. N.; Кулова, Т. Л.; Metlitskaya, A. V.; Мироненко, А. А.; Rudyi, A. S.; Скундин, А. М.

doi:10.1134/s1063785013040032

Cited by 11 publications

(5 citation statements)

References 10 publications

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“…3) are similar to those taken in cells with liquid electrolytes [13,14]. The cathodic half cycle reflects lithium incorporation to the silicon composite; the anodic half cycle, the lithium extraction.…”

Section: Testing Of Polymer Gel Electrolytes In Electrochemical Cell supporting

confidence: 57%

New network-gel-electrolytes consisting of polyethylene glycol diacrylate, LiBF4, and 1-buthyl-3-methylimidazolium tetrafluoroborate, added with alkylene carbonates: the ion transfer mechanism and properties

et al. 2015

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Polymer gel electrolytes based on polyethylene glycol diacrylate, LiBF 4 salt, ethylene carbonate, propylene carbonate, and 1 buthyl 3 methylimidazolium tetrafluoroborate ionic liquid, are synthesized by using radical polymerization. For the optimal composition (polyethylene glycol diacrylate, 19 wt %; LiBF 4 , 10 wt %; 1 buthyl 3 methylimidazolium tetrafluoroborate, 44 wt %; ethylene carbonate, 27 wt %) the con ductivity is maximal: 2.5 × 10 -3 S/cm at 20°C; 1.1 × 10 -2 S/cm at 100°C. The system remains thermostable up to 107°C. It was shown, by using NMR with the pulsed magnetic field gradient, that the polymer matrix is solely involved in the Li + ion solvation in the electrolyte composed of polyethylene glycol diacrylate, LiBF 4 , and 1 buthyl 3 methylimidazolium tetrafluoroborate; and the Li + self diffusion coefficients do not depend on the ionic liquid content. When the electrolyte is added with alkylene carbonates, both the polymer matrix and the sol vent are involved in the Li + ion solvation. The highest conductivity of 10 -3 S/cm (at 20°C) was reached when 27 wt % of ethylene carbonate have been added; here Li + ions are entirely solvated by ethylene carbonate molecules, the diffusion coefficient being equal to 10 -11 m 2 /s.

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Section: Testing Of Polymer Gel Electrolytes In Electrochemical Cell supporting

confidence: 57%

New network-gel-electrolytes consisting of polyethylene glycol diacrylate, LiBF4, and 1-buthyl-3-methylimidazolium tetrafluoroborate, added with alkylene carbonates: the ion transfer mechanism and properties

et al. 2015

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“…The difference in the working pressure and deposition power produced silicon thin films having different densities, which was in good agreement with other studies. ,, Post deposition, the silicon thin films were removed from the chamber and “conditioned” by storing them in a dry ambient environment. Doing so resulted in the surface formation of a thin silicon oxide layer, which has been shown to produce a beneficial effect on discharge capacity and cycle performance. , The amount of pristine and oxidized silicon (%) present within the topmost layer was measured using X-ray photoelectron spectroscopy (XPS) analysis (XPS spectra for the three pairs are given in Figure S1). It was found to be essentially unaltered for all three pairs.…”

Section: Resultsmentioning

confidence: 99%

“…Doing so resulted in the surface formation of a thin silicon oxide layer, which has been shown to produce a beneficial effect on discharge capacity and cycle performance. 27,39 The amount of pristine and oxidized silicon (%) present within the topmost layer was measured using X-ray photoelectron spectroscopy (XPS) analysis (XPS spectra for the three pairs are given in Figure S1). It was found to be essentially unaltered for all three pairs.…”

Section: Resultsmentioning

confidence: 99%

Compressively Stressed Silicon Nanoclusters as an Antifracture Mechanism for High-Performance Lithium-Ion Battery Anodes

Salah

Hall

Eulate

et al. 2020

ACS Appl. Mater. Interfaces

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Silicon has been considered a good candidate for replacing the commonly used carbon anodes for lithium-ion batteries (LIBs) due to its high specific capacity, which can be up to 11 times higher than that of carbon. However, the desirable advantage that silicon brings to battery performance is currently overshadowed by its stress-induced performance loss and high electronic resistivity. The induced stress arises from two sources, namely, the deposition process (i.e., residual stress) during fabrication and the volume expansion (i.e., mechanical stress) associated with the lithiation/delithiation process. Of the two, residual stress has largely been ignored, underestimated, or considered to have a negligible effect without any rigorous evidence being put forward. In this contribution, we produced silicon thin films having a wide range of residual stress and resistivity using a physical vapor deposition technique, magnetron sputtering. Three pairs of silicon thin-film anodes were utilized to study the effect of residual stress on the electrochemical and cyclability performance as anodes for LIBs. Each set consisted of a pair of films having essentially the same resistivity, density, thickness, and oxidation amount but distinctly different residual stresses. The comparison was evaluated by conducting charge/discharge cycling and cyclic voltammetry (CV) experiments. In contrast to the fixed belief within the literature, higher compressive residual-stress films showed better electrochemical and cycle performance compared to lower residual-stress films. The results, herein, present an informed understanding of the role that residual stress plays, which will help researchers improve the development of silicon-based thin-film anodes.

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“…In addition, the specific capacity of graphite anode has been attained. Therefore, nowadays, the synthesis of anode materials having high energy density, free from poison, stable during cycling, and reliable safety comprises a topical issue of the basic science [9][10][11][12]. C 6 þ xLi þ þ xe À () Li x C 6 ; 0 6 x 6 1:…”

Section: Introductionmentioning

confidence: 99%

Structural and electrochemical investigation of nanostructured C:TiO2–TiOF2 composite synthesized in plasma by an original method of pulsed high-voltage discharge

Гнеденков

Opra

Sinebryukhov

et al. 2015

Journal of Alloys and Compounds

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A silicon-containing nanocomposite for a thin-film lithium-ion battery

Cited by 11 publications

References 10 publications

New network-gel-electrolytes consisting of polyethylene glycol diacrylate, LiBF4, and 1-buthyl-3-methylimidazolium tetrafluoroborate, added with alkylene carbonates: the ion transfer mechanism and properties

New network-gel-electrolytes consisting of polyethylene glycol diacrylate, LiBF4, and 1-buthyl-3-methylimidazolium tetrafluoroborate, added with alkylene carbonates: the ion transfer mechanism and properties

Compressively Stressed Silicon Nanoclusters as an Antifracture Mechanism for High-Performance Lithium-Ion Battery Anodes

Structural and electrochemical investigation of nanostructured C:TiO2–TiOF2 composite synthesized in plasma by an original method of pulsed high-voltage discharge

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