Electrodes based on the silicon-carbon nanotube composite for increased-capacity lithium batteries

Galperin, V. A.; Kitsyuk, E. P.; Скундин, А. М.; Tuseeva, E. K.; Кулова, Т. Л.; Shaman, Yu. P.; Skorik, S. N.

doi:10.1134/s1063739714070063

Cited by 3 publications

(1 citation statement)

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“…The study [149] was concerned with specifi c features of the degradation of silicon electrodes in cycling. Based on their own experimental data and published evidence, the authors made an attempt to mathematically express the relationship between the initial capacity Q 0 of a silicon electrode and its capacity Q after a certain number of cycles, with two empirical coeffi cients used.…”

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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Section: E MVmentioning

confidence: 99%