Electrode materials for lithium-ion batteries of new generation

Кулова, Т. Л.; Skundin, A. M.

doi:10.1134/s1023193512020085

Cited by 12 publications

(8 citation statements)

References 18 publications

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“…The absence of Li insertion in this experiment is consistent with voltammetric studies carried out subsequently to the work described in this paper, using the same cell, where characteristic peaks of Li insertion and de-insertion were below 0.6 V. It also agrees with reports from the literature, where Li insertion at potentials above 0.4-0.6 V was not observed, and where also reduced Li insertion was found in the first (voltammetric) cycle. 8,45,46 These findings were in part explained with electrolyte decomposition Table 1 Parameters of the Parratt32 fits of the electrode system in the virgin state. Errors correspond to a 10% increase of w 2 of the best fit with respect to the fitted parameter only.…”

Section: Resultsmentioning

confidence: 98%

Neutron reflectometry studies on the lithiation of amorphous silicon electrodes in lithium-ion batteries

Jerliu

Dörrer

Hüger

et al. 2013

Phys. Chem. Chem. Phys.

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Neutron reflectometry is used to study in situ the intercalation of lithium into amorphous silicon electrodes. The experiments are done using a closed three-electrode electrochemical cell setup. As a working electrode, an about 40 nm thick amorphous silicon layer is used that is deposited on a 1 cm thick quartz substrate coated with palladium as a current collector. The counter electrode and the reference electrode are made of lithium metal. Propylene carbonate with 1 M LiClO4 is used as an electrolyte. The utility of the cell is demonstrated during neutron reflectometry measurements where Li is intercalated at a constant current of 100 μA (7.8 μA cm(-2)) for different time steps. The results show (a) that the change in Li content in amorphous silicon and the corresponding volume expansion can be monitored, (b) that the formation of the solid electrolyte interphase becomes visible and (c) that an irreversible capacity loss is present.

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Section: Resultsmentioning

confidence: 98%

Neutron reflectometry studies on the lithiation of amorphous silicon electrodes in lithium-ion batteries

Jerliu

Dörrer

Hüger

et al. 2013

Phys. Chem. Chem. Phys.

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“…It was established that in case of Li + ions intercalation into anatase structure the discharge curve had a practically horizontal plateau at the potential of 2 V, while intercalation into rutile is associated with smooth potential changes in the range from 2.5 to 1 V. Higher Li-intercalation voltage of TiO 2 as compared to graphite (<0.3 V) improves the safety, which is associated to the metallic lithium deposition on the electrode surface. However, total energy density of Li-ion battery decreases [16][17][18]. Titanium oxyfluoride could uptake more than 4 lithium ions per formula unit with high theoretical specific capacity equal to 1045 mA h g À1 .…”

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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“…Kulova and Skundin [117] considered studies carried out at the Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, in cooperation with a number of other Russia's research centers in the fi eld of development of novel electrode materials for lithium-ion batteries of new generation. The authors noted that the energy storage capacity of the conventional electrochemical system LiCoO 2 -C approached its limiting value W h kg -1 ) and it is required to create new electrode material.…”

Section: E MVmentioning

confidence: 99%

“…Selected studies of this set ere considered in the reviews [117,118]. We only briefl y consider studies of recent years.…”

Section: E MVmentioning

confidence: 99%

Lithium-silicon alloys: Phase diagram, electrochemical studies, thermodynamic properties, application in chemical power cells

Морачевский

Demidov

2015

Russ J Appl Chem

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Review summarizes and analyzes data on the phase diagram, electrochemical behavior in molten media, and thermodynamic properties of alloys in the lithium-silicon system in the solid and liquid states. The use of Li-Si alloys in medium-temperature chemical power cells and prospects for application of silicon and silicon-containing components as the anode material in lithium-ion batteries are discussed.Lithium is one of the most important metals presently determining the scientifi c-technological progress. The metal itself and its alloys and compounds fi nd use in various industries: light alloys, chemical power cells, nuclear technologies, and nonferrous metallurgy [1][2][3][4][5][6][7][8][9][10][11]. The world's production of lithium steadily grows, data on lithium resources, their geographical distribution, and application fi elds of lithium-containing products as of the year of 2006 can be found in [12]. Silicon is the most widely occurring semiconductor; its annual world's production constitutes thousands of tons and continues to grow. LITHIUM-SILICON ALLOYS in detail by nuclear magnetic resonance (NMR), Raman spectroscopy, and electrical measurements. Based on the results of [28,29], Okamoto included the compound LiSi into the phase diagram of the Li-Si system (Fig. 1) in an additional review [30].It should be noted that studies of the electrochemical behavior of a lithium-silicon electrode in molten media made a major contribution to analyses of the phase diagram of the Li-Si system, its modeling, and calculation of the thermodynamic properties of compounds of lithium with silicon.Lithium-silicon electrode. In [31], the discharge of an electrode of the following composition (wt %): 60Li and 40Si (86 at % Li and 14 at % Si) was studied in a molten LiCl-KCl eutectic mixture in the temperature range 360-440°C. The discharge curve at 40°C, presented in [31], demonstrates four clearly pronounced plateaus, which indicate, with the exception of the fi rst plateau corresponding to the potential of pure lithium, that there are double-phase regions and boundaries of these. According to [31], the following compounds are formed in the Li-Si system: The thermodynamic characteristics of these compounds were also evaluated (see below).Nearly simultaneously, charge and discharge curves were recorded in the above-mentioned study [19] for the lithium-silicon electrode, together with electromotive force measurements for circuit (1). In a slow discharge, the presence of double-phase regions was clearly indicated (407 and 487°C). The electrode behaves reversibly in the LiCl-KCl melt and the values obtained for the plateau potentials can be used for thermodynamic calculations. The same authors [32] carried out an extensive study of how electrodes fabricated from alloys of various compositions in the Li-Si system (Li 2 Si, Li 21 Si 8 , Li 15 Si 4 ) behave in measurements of chargedischarge curves in molten LiCl-KCl, LiF-LiCl-KCl, and LiF-LiCl-LiBr electrolytes in the temperature range 400-480°C. The current density was within the ...

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Electrode materials for lithium-ion batteries of new generation

Cited by 12 publications

References 18 publications

Neutron reflectometry studies on the lithiation of amorphous silicon electrodes in lithium-ion batteries

Neutron reflectometry studies on the lithiation of amorphous silicon electrodes in lithium-ion batteries

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

Lithium-silicon alloys: Phase diagram, electrochemical studies, thermodynamic properties, application in chemical power cells

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