Charge–discharge performances of the Si–O–Al electrodes

Мироненко, А. А.; Fedorov, I. S.; Rudy, Alexander; Андреев, В. Н.; Gryzlov, D. Yu.; Кулова, Т. Л.; Скундин, А. М.

doi:10.1007/s00706-019-02497-1

Cited by 8 publications

(9 citation statements)

References 24 publications

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“…The elemental composition of the negative electrode is in the range of values that provide a capacity within 1000-1500 mA•h/g [17]. As Si/Al ratio in the target was 3 while in the Si-O-Al film this ratio is 3.2, the error of the estimation of this element's concentration in the Si-O-Al nanocomposite is insignificant.…”

Section: Morphology and Elemental Composition Of Functional Layersmentioning

confidence: 99%

Effect of the Etching Profile of a Si Substrate on the Capacitive Characteristics of Three-Dimensional Solid-State Lithium-Ion Batteries

et al. 2021

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Along with the soaring demands for all-solid-state thin-film lithium-ion batteries, the problem of their energy density rise becomes very acute. The solution to this problem can be found in development of 3D batteries. The present work deals with the development of a technology for a 3D solid-state lithium-ion battery (3D SSLIB) manufacturing by plasma-chemical etching and magnetron sputtering technique. The results on testing of experimental samples of 3D SSLIB are presented. It was found that submicron-scale steps appearing on the surface of a 3D structure formed on Si substrate by the Bosch process radically change the crystal structure of the upper functional layers. Such changes can lead to disruption of the layers’ continuity, especially that of the down conductors. It is shown that surface polishing by liquid etching of the SiO2 layer and silicon reoxidation leads to surface smoothing, the replacement of the dendrite structure of functional layers by a block structure, and a significant improvement in the capacitive characteristics of the battery.

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Section: Morphology and Elemental Composition Of Functional Layersmentioning

confidence: 99%

Effect of the Etching Profile of a Si Substrate on the Capacitive Characteristics of Three-Dimensional Solid-State Lithium-Ion Batteries

et al. 2021

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“…The technological parameters of Si@O@Al deposition are given in Table 1. In [15][16][17][18], this technology and Si@O@Al's properties are described in more detail. The columnar structure of Si@O@Al promotes lithium diffusion through the entire electrode while layered structure enables a greater number of lithiation-delithiation cycles in liquid electrolytes.…”

Section: Si@o@al Electrode Manufacturing and Characterizationmentioning

confidence: 99%

“…A simple way to overcome this obstacle, described in [15][16][17][18], is an artificial limitation of the capacity by the partial oxidation of silicon. This is achieved by the magnetron sputtering of silicon in an oxygen flow, resulting in the formation of the Si@O@Al nanocomposite.…”

Section: Introductionmentioning

confidence: 99%

Effect of Si-Based Anode Lithiation on Charging Characteristics of All-Solid-State Lithium-Ion Battery

Rudy

Мироненко

et al. 2022

Batteries

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The description of the design, manufacturing technology, and test results of thin-film solid-state lithium-ion batteries with a nanocomposite negative electrode Si@O@Al is given herein. This electrochemical system features the hike on the charging curve plateau, which is interpreted as the change from I–V of the Ti-Si@O@Al contact. The latter is due to the change in the type of silicon conductivity during lithiation, as a result of which the ohmic metal-semiconductor contact proves to be biased in the reverse direction, and the charging current is maintained by minority charge carriers. It is shown that the current-conducting component Si@O@Al is formed by a solid solution a-Si(Al), which has a p-type conductivity. The change in the type of conductivity occurs as a result of silicon compensation through lithiation. It was found that Si@O@Al is nonlinear conductor, which can be considered as a percolation cluster formed by amorphous silicon nanoparticles and molecular clusters of silicon dioxide. The height of the Schottky barrier of the Ti|a-Si(Al) contact and the electron affinity of the a-Si(Al) solid solution were estimated.

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“…This problem was solved by using amorphous silicon with artificially restricting its capacity by its partial oxidation and increasing its conductivity by implanting 10−15 at.% of aluminum into the silicon matrix. Finally, a magnetron sputtering technique for deposition the electrode nanocomposite material Si@O@Al was developed [1][2][3]; having a high capacity (up to 3000 mA • h/g), this material withstands within TSLIB more than 1000 charge−discharge cycles.…”

mentioning

confidence: 99%

Schottky barrier in Si-M structures of solid-state lithium-ion batteries

Rudy

Мироненко

Наумов

et al. 2022

Technical Physics Letters

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The results of measuring the charge-discharge characteristics of solid-state thin-film lithium-ion batteries with a nanocomposite anode based on the a-Si(Al) solid solution are presented. The charging characteristics of batteries have a feature in the form of a step on the gentle branch of the U(t) curve. It has been suggested and substantiated that the appearance of the step is related to the gradual compensation and change of the a-Si(Al) hole conductivity to electronic one as the lithium concentration increases. As a result, the a-Si(Al)|Ti ohmic contact becomes rectifying, and the electrons participating in the Faraday process have to overcome the Schottky barrier. The potential growth required to maintain the galvanostatic charge regime manifests itself as a step on the charge curve. Keywords: thin film solid-state lithium-ion battery, amorphous silicon, solid solution, sp3 hybridization, lithiation, Schottky barrier.

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Charge–discharge performances of the Si–O–Al electrodes

Cited by 8 publications

References 24 publications

Effect of the Etching Profile of a Si Substrate on the Capacitive Characteristics of Three-Dimensional Solid-State Lithium-Ion Batteries

Effect of the Etching Profile of a Si Substrate on the Capacitive Characteristics of Three-Dimensional Solid-State Lithium-Ion Batteries

Effect of Si-Based Anode Lithiation on Charging Characteristics of All-Solid-State Lithium-Ion Battery

Schottky barrier in Si-M structures of solid-state lithium-ion batteries

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