Electrochemical Deposition of Silicon-Carbon Films: A Study on the Nucleation and Growth Mechanism

Plugotarenko, Nina K.; Myasoedova, Tatiana N.; Grigoryev, Mikhail N.; Mikhailova, T. S.

doi:10.3390/nano9121754

Cited by 12 publications

(7 citation statements)

References 26 publications

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“…The discharge curves of the SCF are non-linear, which confirms their pseudocapacitive nature. In the case of SCFs doped with manganese and nickel the presence of noticeable plateau (especially in the case of nickel) on the discharge curve indicates the occurrence of redox reactions in accordance with the CVA curves [27]. For " pure" SCF, there are no noticeable plateaus, which indicates that the primary process is the discharge of a double electric layer formed on the surface of the material during charging.…”

Section: Functional Characteristics Study and Simulationmentioning

confidence: 52%

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Study of functional characteristics of mesoporous electrodes of supercapacitors based on silicon-carbon films

2022

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The study of the supercapacitor electrodes based on silicon-carbon films obtained by electrochemical deposition from solutions with different ratios of methanol/hexamethyldisilane and addition of manganese and nickel salts was carried out using cyclic voltammetry, electrochemical impedance spectroscopy and impedance Nyquist plots simulation by equivalent circuits method. The predominance of mesopores in the electrode samples was confirmed by the functional density method. According to a scanning electron microscopy study, the surface morphology of the silicon-carbon films is highly developed due to the presence of three-dimensional agglomerates and "foliated" structures. The best retention of specific capacity after 450 charge/discharge cycles is observed for electrode samples containing manganese and nickel. Simulation of equivalent circuits showed that all types of electrodes have hierarchical pore structure. Ffter 450 charge/discharge cycles an increase in pore storage resistance and a decrease in transport pore resistance due to the activation of deeper pore levels is observed. The applicability of Peukert's law for the electrodes based on silicon-carbon films for prediction of electrode discharge time is shown. Keywords: Porous electrodes, silicon-carbon films, electrochemical impedance spectroscopy, equivalent circuit models, Peukert's law.

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Section: Functional Characteristics Study and Simulationmentioning

confidence: 52%

“…Pure" SCF and SCF doped with metal atoms were obtained by the method of electrochemical deposition described in the papers [26,27]. The deposition was carried out on copper foil substrates 28 × 12 × 0.5 mm, mounted on the negative electrode.…”

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confidence: 99%

Study of functional characteristics of mesoporous electrodes of supercapacitors based on silicon-carbon films

2022

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“…A gas-sensitive layer was formed on interdigitated electrodes using the electrochemical deposition technique [47][48][49]. In the first stage, the deposition of the pure silicon-carbon film from methanol and hexamethyldisilazane (HMDSN) (ratio 9:1) solution was carried out for 40 min at 150 V. In the second stage, copper acetate (0.14 wt.%) was added to the electrolyte, and the film deposition continued for 5 min at 50 V. Finally, a methanol/HMDSN (ratio 9:1) solution was deposited onto the silicon-carbon film layer for 40 min at 150 V. Then, the films were annealed at 200 • C for 2 h. Interdigitated electrodes were formed via the vacuum vapor deposition of Cr/Cu/Cr (h Cr = 15 nm, h Cu = 2 µm) layers on the Al 2 O 3 substrate with the following laser demetallization (MicroSET-M Granite RA, Russia): step between electrodes-50 µm; electrode width-50 µm.…”

Section: Methodsmentioning

confidence: 99%

Investigation of Adsorption Kinetics on the Surface of a Copper-Containing Silicon–Carbon Gas Sensor: Gas Identification

Plugotarenko,

Novikov,

Myasoedova

et al. 2023

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The low selectivity of materials to gases of a similar nature may limit their use as sensors. Knowledge of the adsorption kinetic characteristics of each gas on the surface of the material may enable the ability to identify them. In this work, copper-containing silicon–carbon films were formed using electrochemical deposition on the Al2O3 substrate with interdigitated Cr/Cu/Cr electrodes. These films showed good adsorption characteristics with several different gases. The adsorption kinetics of nitrogen dioxide, sulfur dioxide, and carbon monoxide on the film surface were investigated by the change in the resistivity of the material. Pseudo-first-order and pseudo-second-order kinetics, Elovich, Ritchie, and Webber intraparticle diffusion models were applied. It was found that the largest approximation factor and the lowest Root-Mean-Square Error and Mean Bias Error for all three gases were for the Elovich model. The advantages of silicon–carbon copper-containing films for gas sensor applications were shown. An algorithm for gas recognition was proposed based on the dependence of the change in the resistivity of the material under stepwise gas exposure. It was found that parameters such as the values of the extrema of the first and second derivatives of the R vs. t dependence during adsorption and the slope of R vs. t dependence in the Elovich coordinates are responsible for gas identification among several one-nature gases.

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“…The need for additional purification of electrolytic silicon by recrystallization methods in order to achieve semiconductor purity remains questionable. Recently, methods have been proposed for obtaining silicon and silicon-based materials by electrodeposition from ionic liquids and organic electrolytes [18,19]. These methods are of interest, although their industrial implementation will require large volumes of expensive reagents.…”

Section: Introductionmentioning

confidence: 99%

Silicon Electrodeposition for Microelectronics and Distributed Energy: A Mini-Review

Suzdaltsev

2022

Electrochem

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Due to its prevalence in nature and its particular properties, silicon is one of the most popular materials in various industries. Currently, metallurgical silicon is obtained by carbothermal reduction of quartz, which is then subjected to hydrochlorination and multiple chlorination in order to obtain solar silicon. This mini-review provides a brief analysis of alternative methods for obtaining silicon by electrolysis of molten salts. The review covers factors determining the choice of composition of molten salts, typical silicon precipitates obtained by electrolysis of molten salts, assessment of the possibility of using electrolytic silicon in microelectronics, representative test results for the use of electrolytic silicon in the composition of lithium-ion current sources, and representative test results for the use of electrolytic silicon for solar energy conversion. This paper concludes by noting the tasks that need to be solved for the practical implementation of methods for the electrolytic production of silicon, for the development of new devices and materials for energy distribution and microelectronic application.

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Electrochemical Deposition of Silicon-Carbon Films: A Study on the Nucleation and Growth Mechanism

Cited by 12 publications

References 26 publications

Study of functional characteristics of mesoporous electrodes of supercapacitors based on silicon-carbon films

Study of functional characteristics of mesoporous electrodes of supercapacitors based on silicon-carbon films

Investigation of Adsorption Kinetics on the Surface of a Copper-Containing Silicon–Carbon Gas Sensor: Gas Identification

Silicon Electrodeposition for Microelectronics and Distributed Energy: A Mini-Review

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