Electrochemical lithiation of thin silicon based layers potentiostatically deposited from ionic liquid

Vlaic, Codruta Aurelia; Ivanov, Svetlozar; Peipmann, Ralf; Eisenhardt, Anja; Himmerlich, Marcel; Krischok, S.; Bund, Andreas

doi:10.1016/j.electacta.2015.03.216

Cited by 43 publications

(44 citation statements)

References 57 publications

(95 reference statements)

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“…Therefore, ionic liquids have attracted much attention as electrolyte solvents for use in LIBs. Some researchers reported negative‐electrode performance of electrodeposited Si electrode in lithium bis(trifluoromethanesulfonyl)amide/1‐butyl‐1‐methylpyrrolidinium bis(trifluoromethanesulfonyl)amide, which was relatively high cycling stability compared to that in an organic electrolyte . We previously investigated the electrochemical performance of Si‐based electrodes in various ionic liquid electrolytes .…”

Section: Introductionmentioning

confidence: 99%

“…Some researchers reported negative-electrode performance of electrodeposited Si electrode in lithium bis(trifluoromethanesulfonyl)amide/1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)amide, which was relatively high cycling stability compared to that in an organic electrolyte. [10][11][12] We previously investigated the electrochemical performance of Si-based electrodes in various ionic liquid electrolytes. [13][14][15][16][17][18] We found that the cycling stabilities of Si-alone electrodes were significantly improved in some ionic liquid electrolytes.…”

Section: Introductionmentioning

confidence: 99%

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Elucidation of the Reaction Behavior of Silicon Negative Electrodes in a Bis(fluorosulfonyl)amide‐Based Ionic Liquid Electrolyte

et al. 2017

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Excellent cycling performance of an electrode composed of silicon alone was achieved in a bis(fluorosulfonyl)amide (FSA)‐based electrolyte, with a high discharge capacity of 950 mA h g−1 observed even at the 500th cycle. To elucidate the reaction behavior of the Si electrode in an FSA‐based ionic liquid electrolyte, we investigated the change in the cross‐sectional morphology of the Si‐active material layer, the distribution of Li in the layer, and the crystallinity of Si on the electrode surface. By cross‐sectional scanning electron microscopy, we confirmed that the electrode thickness increased with the cycle number. The increase in thickness was less noticeable in the FSA‐based electrolyte than in an organic electrolyte. An elemental analysis of the electrode material revealed that a film derived from the electrolyte was formed not only on the surface but also inside of the electrode. Soft X‐ray emission spectroscopy demonstrated that the distribution of Li in the FSA‐based electrolyte was more uniform for the cross‐section of the cycled electrode compared to that in an organic electrolyte. The results of Raman spectroscopy indicated that domains of amorphous Si were homogeneously distributed on the electrode surface in the FSA‐based electrolyte. The uniform distribution of the lithiation−delithiation reaction should help to suppress disintegration of the active material layer.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Elucidation of the Reaction Behavior of Silicon Negative Electrodes in a Bis(fluorosulfonyl)amide‐Based Ionic Liquid Electrolyte

et al. 2017

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“…X-ray photoelectron spectroscopy measurements of the zinc surface are performed in normal emission using monochromated aluminium K a radiation (hn = 1486.7 eV) and a SPECS Phoibos 150 hemispherical electron analyzer. Sequential depth profiling are utilized by a differentially pumped ion source, laterally scanning 3 keV argon ions across the sample surface (scan area 7 mm 3 7 mm) [13]. The samples were inserted into the vacuum chamber directly after the final zinc electrodeposition step and subsequent rinsing in deionized water, followed by a nitrogen dry blow.…”

Section: Analysis Methodsmentioning

confidence: 99%

“…The Zn3d spectrum includes several chemical states at 12.2 eV, 11.1 eV and 10.1 eV, respectively, which have been fitted using Gaussian-Lorentzian line shapes, Figure 2b. The latter is due to zinc electrons in a metallic state (Zn 0 ) [14], while the two features at higher binding energy indicate an oxidation of the outermost surface due to contact with the water-based swill and air before insertion into the vacuum chamber. They have been assigned to oxide and hydroxide surface species, respectively, in comparison with former studies [14,15].…”

Section: Characterization Of the Electroplated Zinc Coatingmentioning

confidence: 99%

Controlled adsorption of titanium(IV) oxide particles on electroplated zinc coatings to improve the corrosion resistance of chromium(VI)‐free conversion layers

Halbedel

Himmerlich

2019

Materialwissenschaft Werkst

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Adsorption of nano‐scaled titanium(IV) oxide particles on electroplated zinc is performed by a simple dip‐coating technique in an aqueous titanium(IV) oxide suspension prepared with a stirred media mill. X‐ray photoelectron spectroscopy, scanning electron microscopy and X‐ray fluorescence spectroscopy are carried out to investigate the composition of the zinc surface and the thickness and porosity of the adsorbed titania films. The zinc surface formed during the electrodeposition process is of oxyhydroxide nature and the thickness of the adsorbed titania particle layer is controlled by the pH value and the solid concentration of the suspension. In the range of 10 wt.%–30 wt.% titanium(IV) oxide, a linear dependence between the titania film thickness and the solid content of titania particles in the suspension is found. Highest film thicknesses are obtained in alkaline media (pH≥9). At 13.5 wt.% titania particles and pH values below pH = 2.4, the titania particle film is not closely packed and the zinc layer underneath is still visible in electron microscopy, which is a prerequisite for imbedding these particles by a thin second zinc layer for formation of a robust chromium(VI)‐free passivation layer containing the titania particles.

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“…More details about the experimental setup can be found in Ref. [43]. Core level spectra were recorded without charge neutralization at 15 eV constant pass energy for a sample area of 1 mm diameter.…”

Section: X-ray Photoelectron Spectroscopy and Scanning Electron Micromentioning

confidence: 99%

Microgravimetric and Spectroscopic Analysis of Solid−Electrolyte Interphase Formation in Presence of Additives

et al. 2019

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Electrochemical quartz crystal microbalance (EQCM) with damping monitoring is applied for real‐time analysis of solid−electrolyte interphase (SEI) formation in diphenyl octyl phosphate (DPOP) and vinylene carbonate (VC) modified electrolytes. Fast SEI formation is observed for the DPOP containing electrolyte, whereas slow growth is detected in VC‐modified and reference electrolytes. QCM measurements in a dry state show considerable reduction of the mass quantity for DPOP and reference samples and minor mass decrease for the SEI layer formed in the presence of VC. The results indicate that VC enhances SEI stability, whereas the addition of DPOP or no additive results in incorporation of loosely attached species, leadubg to SEI instability. Resonance frequency damping, Δw, and dissipation factor, D, are used for analyzing mechanical properties of the SEI layers. The apparent increase of Δw and D during SEI formation in presence of DPOP suggests a pronounced viscoelasticity of the layer. QCM results are compared with surface morphology and chemical composition, revealing excellent agreement of the applied characterization approaches.

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Electrochemical lithiation of thin silicon based layers potentiostatically deposited from ionic liquid

Cited by 43 publications

References 57 publications

Elucidation of the Reaction Behavior of Silicon Negative Electrodes in a Bis(fluorosulfonyl)amide‐Based Ionic Liquid Electrolyte

Elucidation of the Reaction Behavior of Silicon Negative Electrodes in a Bis(fluorosulfonyl)amide‐Based Ionic Liquid Electrolyte

Controlled adsorption of titanium(IV) oxide particles on electroplated zinc coatings to improve the corrosion resistance of chromium(VI)‐free conversion layers

Microgravimetric and Spectroscopic Analysis of Solid−Electrolyte Interphase Formation in Presence of Additives

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