Stable silicon electrodes with vinylidene fluoride polymer binder for lithium-ion batteries

Kuksenko, S. P.; Tarasenko, Yu. O.; Kaleniuk, H. O.; Кartel, M. T.

doi:10.15407/hftp11.01.058

Cited by 5 publications

(2 citation statements)

References 54 publications

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“…This results in poor electrode cycling stability. In an effort to increase the specific energy and power of LIB, the main efforts of researchers are aimed at creating silicon nanomaterials [5]. Various silicon nanostructures with a high life cycle have been demonstrated in the literature [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…In an effort to increase the specific energy and power of LIB, the main efforts of researchers are aimed at creating silicon nanomaterials [5]. Various silicon nanostructures with a high life cycle have been demonstrated in the literature [4][5][6]. It has been shown that nano-silicon structures overcome the effects of degradation from volume expansion as a result of their ability to relax stresses.…”

Section: Introductionmentioning

confidence: 99%

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Consideration of the possibility of large-scale plasma-chemical production of nanosilicon for lithium-ion batteries

Петров

Bondarenko

Sato³

2022

TAPR

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The object of research is the process of obtaining silicon nanomaterials for lithium-ion batteries of energy storage devices, and the subject of research is the technology of gas-phase plasma-chemical synthesis for the production of Si-nanoparticles. In the course of the study, numerical simulation methods were used, which made it possible to determine the parameters of temperature fields, velocities and concentrations. To study the processes of synthesis of nanopowders, a plasma reactor with an electric arc plasma torch of a linear scheme and using an argon-hydrogen mixture as a plasma-forming gas was developed. To analyze the influence of an external magnetic field on the control of the plasma jet parameters, a series of experiments was carried out using an electric arc plasma torch on plasma laboratory facilities with a power of 30 and 150 kW. The influence of a magnetic field on the process of formation and evaporation of a gas-powder flow in a plasma jet was studied by determining the configuration, geometric dimensions, and structure of the initial section of the jet. In this case, the dispersed material – silicon powder was fed to the plasma torch nozzle section according to the radial scheme. Experimental confirmation of the phenomenon of elongation of the high-temperature initial section of the plasma jet in a longitudinal magnetic field has been obtained. The experimental results indicate that the creation of a peripheral gas curtain significantly changes the characteristics of heat and mass transfer in the reactor. It should be expected that for optimization it is possible to exclude the deposition of nanosilicon particles on the walls of the reactor and provide conditions for continuous operation. The effect of two-phase flow, heat transfer, and mass flow of nanoparticles, including the surface of a plasma reactor with limited jet flow, in the processes of obtaining silicon nanopowders has been studied. This made it possible to correct a number of technological characteristics of the process of constructive design of the actions of plasma synthesis of nanopowders. The patterns obtained can be used for constructive and technological design in the creation and development of a pilot plant for high-performance production of nanosilicon powders.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Consideration of the possibility of large-scale plasma-chemical production of nanosilicon for lithium-ion batteries

Петров

Bondarenko

Sato³

2022

TAPR

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Influence of electrolyte additive of trimethylsilylisocyanate on properties of electrode with nanosilicon for lithium-ion batteries

Kuksenko¹,

Kaleniuk²,

Tarasenko³

et al. 2021

Him. Fiz. Tehnol. Poverhni

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Even partial replacement of graphite in the anode of lithium-ion batteries with silicon can significantly increase their specific energy. But the issue is the insufficient life cycle of such batteries due to the accelerated degradation of the liquid organic electrolyte with traditional lithium hexafluorophosphate, especially at elevated temperatures. The subject of discussions and further research are the processes involving a natural oxide layer on the surface of silicon in the manufacture and electrochemical litiation–delitiation of Si-containing electrodes. Among the most promising areas for solving the issues of practical application of silicon are new additives to the electrolyte and polymeric binders for electrode masses. This paper demonstrates the capability of trimethylsilylisocyanate (with aminosilane and isocyanate functional groups) as an additive to a liquid organic electrolyte (LiPF6 / fluoroethylene carbonate + ethyl methyl carbonate + vinylene carbonate + ethylene sulfite) to scavenge the reactive HF and PF5 species that alleviates the thermal decomposition of fluoroethylene carbonate at elevated temperatures. This makes it possible to increase the electrochemical parameters of half-cells with a hybrid graphite–nanosilicon working electrode when using water-based binders – carboxymethylcellulose and styrene-butadiene rubber. The addition of trimethylsilylisocyanate in the electrolyte significantly improves the reversible capacity of hybrid electrodes and reduces the accumulated irreversible capacity during prolonged cycling at normal temperature and after exposure at 50 °C, therefore to be effective for use in high-energy lithium-ion batteries.

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The triad “electrode – solid electrolyte interphase – electrolyte” as a ground for the use of conversion type reactions in lithium-ion batteries

Kuksenko¹,

Kaleniuk²,

Tarasenko³

et al. 2021

Him. Fiz. Tehnol. Poverhni

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The solution to the problem of negative impact on the ecology of fossil fuel consumption is the use of electrochemical energy sources. The special attractiveness has shown of lithium power sources is highlighted and the need to develop new cheap electrode materials and electrolytes with unique properties. The peculiarities of the behavior of lithium and the formation of a layer of reaction products on its surface upon contact with a liquid organic electrolyte have considered. The analysis of the main problems and ways of their solution at use of conversion electrodes of the II type for lithium-ion batteries has carried out. Emphasis is placed on the need to use in the development of new electrode materials of such parameters as capacity loading and accumulated irreversible capacity of the electrodes. The triad “electrode – solid electrolyte interphase – electrolyte” is considered as a basis of a systematic approach to the creation of new generations of lithium power sources. The optimal scenarios have proposed for the formation of an effective solid electrolyte interphase on the surface of the electrodes. The advantages of electrolytes based on fluoroethylene carbonate with synergistic acting additives of vinylene carbonate and ethylene sulfite are described. A new strategy for the use of “secondary” silicon nanomaterials to prevent direct contact of its surface with the electrolyte has considered. It has shown that the solid electrolyte interphase is a dynamic system that self-organizes from the unstable state into a stable one. The electrochemical behavior of electrodes with silicon nanocomposites with high capacity loading and low accumulated irreversible capacity has described.

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Stable silicon electrodes with vinylidene fluoride polymer binder for lithium-ion batteries

Cited by 5 publications

References 54 publications

Consideration of the possibility of large-scale plasma-chemical production of nanosilicon for lithium-ion batteries

Consideration of the possibility of large-scale plasma-chemical production of nanosilicon for lithium-ion batteries

Influence of electrolyte additive of trimethylsilylisocyanate on properties of electrode with nanosilicon for lithium-ion batteries

The triad “electrode – solid electrolyte interphase – electrolyte” as a ground for the use of conversion type reactions in lithium-ion batteries

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