Maxim Yu. Maximov

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• Doctor of Engineering
• Professor at Peter the Great St.Petersburg Polytechnic University

Lithium metal anode emerges as an ideal candidate for the next generation of high‐energy‐density batteries. However, challenges persist in achieving high lithium utilization rates while maintaining the demands of high energy density and extended cycle life. In this work, a novel conversion–lithiophilicity strategy is proposed to regulate the longev...

Li1.5Al0.5Ge1.5(PO4)3 (LAGP) solid electrolytes are promising for solid-state batteries (SSBs) because of their electrochemical and air stability. However, to improve the power characteristics of SSBs, increasing the ionic conductivity of the solid electrolyte is necessary. To improve the conductive properties of a superionic glass–ceramic electrol...

Solid-state battery with lithium anode and NASICON-type electrolyte, particularly Li1+xAlxGe2-x(PO4)3 (LAGP), is promising safety rechargeable energy source. However, the Li|LAGP system exhibits a rapid decline in performance and a limited operational lifespan. One potential avenue for enhancing operational lifespan is the introduction of functiona...

This work presents for the first time the possibility of reducing and tuning the work function of field emission cathodes coated with metal oxides by changing the chemical composition of oxide coatings using an example of heat-treated CNT/NiO nanocomposite structures. These cathodes are formulated using carbon nanotube (CNT) arrays that are coated...

Solid-state batteries (SSB) development is the focus area of safe lithium energy storage devices. One of the most promising solid electrolytes for SSBs is Li1+xAlxGe2-x(PO4)3 (LAGP), which stands out for cathode interface stability, air and temperatures stability. However, LAGP ceramic’s main challenge remains the low conductivity compared to the b...

In this work binder-free hybrid materials based on carbon fibers modified with metal oxides (HMs) were successfully synthesized via a non-stationary electrolysis method as perspective anode materials for lithium-ion batteries. In attempt to improve the cycling performance and storage performance, the HMs were doped with vanadium and tungsten oxides...

Today, lithium-ion batteries (LIBs) are the most widespread technology for electric energy storage. However, the technology requires further improvement, and one of the directions is atomic layer deposition protective coating creation on LIBs electrodes. The titanium oxide thin film's influence on the NCM111 cathode electrochemical characteristics...

In recent years, antibacterial coatings have become an important approach in the global fight against bacterial pathogens. Developments in materials science, chemistry, and biochemistry have led to a plethora of materials and chemical compounds that have the potential to create antibacterial coatings. However, insufficient attention has been paid t...

In recent years, antibacterial coatings have become a significant approach in the global fight against bacterial pathogens. Developments in materials science, chemistry and biochemistry have led to a plethora of materials and chemical compounds that have potential for creating antibacterial coatings. Nonetheless, there has been insufficient conside...

Atomic layer deposition (ALD) is a useful tool for producing ultrathin films and coatings of complex composition with high thickness control for a wide range of applications. In this study, the growth of zinc–titanium oxide nanofilms was investigated. Diethyl zinc, titanium tetrachloride, and water were used as precursors. The supercycle approach w...

It is not enough to develop an ideal hydrogen evolution reaction (HER) electrocatalysts by single strategy. Here, the HER performances are significantly improved by the combined strategies of P and Se binary vacancies and heterostructure engineering, which is rarely explored and remain unclear. As a result, the overpotentials of MoP/MoSe2‐H heteros...

Titanium niobium oxide as an electrode material for lithium-ion batteries (LIBs) has relatively high working potential and theoretical capacity, which is expected to replace a graphite anode. However, it possesses low electronic conductivity, leading to the internal electrochemical polarization of the battery during high current charging, which is...

Constructing hetero-structured catalyst is promising but still challenging to achieve overall water splitting for hydrogen production with high efficiency. Herein, we developed a sulfide-based MoS2/Co1−xS@C hetero-structure for highly efficient electrochemical hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The carbon derived...

Alternate methods for deposition of electrochromic metal oxide thin films need to be explored to obtain an optimized one while designing solid state hybrid or all-inorganic electrochromic device. To continue this quest, electrochromic performance from a hybrid electrochromic device obtaining using plasma assisted atomic layer deposition (ALD) grown...

In this work, we proposed a method for creating an Ag/Si composite structure consisting of an array of vertical silicon nanowires (SiNWs) decorated with silver nanoparticles (AgNPs). A two-stage metal-assisted chemical etching of Si was used to obtain the SiNW array, and atomic layer deposition was used to fabricate the AgNPs. A uniform distributio...

This work investigated the possibility of increasing the cycle life and rate capability of silicon anodes, made of macroporous membranes, by adding fluoroethylene carbonate (FEC) to the complex commercial electrolyte. It was found that FEC leads to a decrease in the degradation rate; for a sample without FEC addition, the discharge capacity at the...

Nowadays, lithium-ion batteries (LIBs) are one of the most convenient, reliable, and promising power sources for portable electronics, power tools, hybrid and electric vehicles. The characteristics of the positive electrode (cathode active material, CAM) significantly contribute to the battery’s functional properties. Applying various functional co...

The paper presents a study of a large-area field emitter based on a composite of vertically aligned carbon nanotubes covered with a continuous and conformal layer of nickel oxide by the atomic layer deposition method. The arrays of carbon nanotubes were grown by direct current plasma-enhanced chemical vapor deposition on a pure Si substrate using a...

The formation of hybrid structures for creating sensitive sensors is a difficult task. In this study, we developed a facile technique of semiconductor technology to fabricate hybrid structures based on SiO2/embedded Ag/Si and embedded Ag/Si for a surface-enhanced Raman scattering. Herein, our hybrid structures were created in one technological cycl...

Thin-film Li-ion batteries produced by precise thickness control atomic layer deposition (ALD) method are promising, safe, and high-energy density sources for miniature devices. The paper presents a detailed analysis of the multilayer thin film cathode for microbatteries. Structures were obtained by combining several technological parameters to inc...

Transition Metal Oxides/Carbon Cloth Hybrids were synthesized by electrochemical method using non-stationary electrolysis. The morphology and surface structure of the developed hybrids were studied using scanning electron microscopy and transmission electron microscopy. According to X-ray spectral microanalysis, the main elements of hybrid oxide co...

Here, we study an effect of FEC addition to TC-E918 electrolyte on the electrochemical performance of Si/C negative electrodes. The anodes were fabricated from nanosilicon powder coated with a carbon shell by means of a standard slurry technique. The low-temperature reduction of fluorocarbon on the surface of Si nanoparticles was used to form the s...

Compositional and structural engineering of high-performance catalysts is vital for electrochemical catalysis, but challenges remain in their facile synthesis and efficient controls. Herein, a novel vaporization-nitridation synthesis strategy with simple operation is developed to prepare hierarchically porous cobalt nitride hybrid nanosheets grown...

The combination of titania nanofilms and silver nanoparticles (NPs) is a very promising material, with antibacterial and osseointegration-induced properties for titanium implant coatings. In this work, we successfully prepared TiO2 nanolayer/Ag NP structures on titanium disks using atomic layer deposition (ALD). The samples were studied by scanning...

Исследован процесс формирования тонких пленок системы Ni–Mn–O методом молекулярного наслаи- вания при эквивалентном напуске металлоорганических реагентов. В качестве исходных реагентов использовались бис(циклопентадиенил)никеля (NiCp2) и трис(2,2,6,6-тетраметил-3,5-гептандионато)- марганца(III) [Mn(thd)3], для формирования кислородсодержащих структ...

Titanium oxide nanocoatings were synthesized on the surface of monocrystalline silicon and ultra-fine-grained titanium by atomic layer deposition (ALD) using titanium tetrachloride (TiCl4) and titanium tetraisopropoxide (TTIP). The morphology of the samples was studied by scanning electron microscopy (SEM) and transmission electron microscopy (TEM)...

Titanium oxide is commonly considered as an effective catalyst for photo-electrochemical water splitting due to its low cost, high activity, and perfect stability. However, a wide bandgap of TiO2 prevents the utilization of visible and near-infrared photons in the photo-electrochemical process. Photosensitization of TiO2 with plasmon active nanostr...

Li-rich oxides are materials shows a high specific discharge capacity which is achieved through a special charging procedure called activation. Still, these materials have the following disadvantages: a short cycle life and a drop of average discharge voltage. This paper describes the synthesis of Li1.2Ni0.13Co0.13Mn0.54O2 (LMR) and its 5 at.%. K d...

Used cigarette filters, a waste material and a major source of land pollution, were used as raw material to study the nature of condensed tobacco smoke (tar) using microscopy, optical, IR, photoluminescence, and Raman spectroscopy, as well as X-ray diffraction and electron and fluorescence microscopy. The tar present in the cigarette filter bud was...

Temperature conditions are significant for the crystal structure formation of prospective cathode materials, determining their further performance and cycle life. The paper presents the results of a detailed analysis of the multilayer thin films before and after heat treatment. The investigated multilayer structures consist of a two-layer system of...

Thin-film solid-state lithium-ion batteries (SSLIBs) are promising power supplies for small-scale electronics, particularly for Internet of Things (IoT) devices, sensors, microchips, and others. Transition metal oxides have potential for application in SSLIBs due to their high theoretical capacity. In this work, films of mixed nickel and aluminum o...

Exploring highly-efficient, economical and environment friendly electrocatalysts towards hydrogen and oxygen evolution reaction (HER and OER) is necessary but challenging for water splitting. Herein, FeS2 nanoparticles were anchored on the...

One of the most promising technologies for increasing the safety and durability of solid- state batteries (SSB) is nano-coating between electrodes and electrolytes. The paper presents the results of a detailed microscopic and electrochemical analysis of multilayer thin films. The investigated multilayer structures consist of a two-layer system of a...

Temperature-dependent Raman spectromicroscopy of rutile TiO2 nanorods has been studied here to understand the effect of thermal perturbations on different Raman-active phonon modes. The TiO2 nanorods, characterized using electron microscopy, X-ray diffraction and Raman spectroscopy, were prepared using a hydrothermal method. Raman spectra, recorded...

The effect of the oxidizer present in the etching solution on the surface morphology and microstructure obtained after porosifying a p-type silicon wafer using metal-assisted chemical etching was studied. The morphologies of Si wafers porosified using two different solutions, HF/H2O2 and HF/KMnO4, were compared to establish how either of the oxidiz...

The tantalum oxide thin films are promising materials for various applications: as coatings in optical devices, as dielectric layers for micro and nanoelectronics, and for thin-films solid-state lithium-ion batteries (SSLIBs). This article is dedicated to the Ta-O thin-film system synthesis by the atomic layer deposition (ALD) which allows to depos...

Nanostructured metal oxides (MOs) demonstrate good electrochemical properties and are regarded as promising anode materials for high-performance lithium-ion batteries (LIBs). The capacity of nickel-cobalt oxides-based materials is among the highest for binary transition metals oxide (TMOs). In the present paper, we report the investigation of Ni-Co...

In this work, we study the influence of the surface properties of ultrafine grained (UFG) and coarse grained (CG) titanium on the morphology, viability, proliferation and differentiation of osteoblast-like MG-63 cells. Wet chemical etching in H2SO4/H2O2 and NH4OH/H2O2 solutions was used for producing surfaces with varying morphology, topography, co...

Energy density is one of the essential characteristics of thin-film power sources which provides the duration of the autonomous performance of sensors, energy harvesters, IoT devices, etc. The Atomic layer deposition (ALD) allows the growth of conformal coatings with a controlled composition on high aspect ratio substrates and can be used to manufa...

Thin-film solid-state lithium-ion batteries can provide autonomous operation of miniature devices (biosensors, smartwatches, medical devices, etc.). In this work, we investigated the processes of obtaining thin films of manganese oxide by atomic layer deposition (ALD), and their electrochemical activity as an anode of a lithium- ion battery (LIBs)....

In this work substrates able to efficiently perform so-called photo-electrochemical process are proposed. The hybrid substrates consist of a plasmon-active gold structure and a certain number of TiO2 layers deposited by the atomic layer deposition (ALD) method. Above the influence of LED lamp irradiation (λ=850 nm) in the water splitting process, t...

Thin-film transition metal oxides can be applied as transparent conductive coatings, photocatalysts, thermoelectric generators, and battery electrodes. In power sources application binary transition metal oxides are attractive due to high theoretical capacities. Among them nickel-cobalt oxides possess the highest (NiCoO2, 717mAh/g or 471.4 μAh cm-2...

Solid-state batteries (SSBs) are regarded as the next step in energy storage technology. One of the main problems in developing such batteries is developing and synthesizing solid-state electrolytes (SSE). The main factor that stops the introduction of SSBs into everyday life is the low ionic conductivity of Li ions in modern SSEs. Therefore, the p...

Lithium nickelate (LiNiO2) and materials based on it are attractive positive electrode materials for lithium-ion batteries, owing to their large capacity. In this paper, the results of atomic layer deposition (ALD) of lithium–nickel–silicon oxide thin films using lithium hexamethyldisilazide (LiHMDS) and bis(cyclopentadienyl) nickel (II) (NiCp2) as...

Li-rich oxides are one of the most promising cathode materials for the new generation of lithium-ion bat- teries (LIBs). This work describes the preparations of Li-rich cathode materials with composition Li1.20Ni0.13Co0.13Mn0.54O2 and the potassium – doped material Li1.15K0.05Ni0.13Co0.13Mn0.54O2. The oxides are synthesized from acetates of metals...

The development of additive manufacturing technology has allowed to begin the implementation of the concept of personalized implants in medicine. Medical implants should have not only mechanical prop- erties close to bone tissue, but also have good biocompatibility, antibacterial and osseointegrating prop- erties. These characteristics are determin...

Tin oxide is the most promising material for thin film anodes of Li-ion batteries due to its cycling performance and high theoretical capacity. It is assumed that lithium-tin oxide can demonstrate even higher performance. Lithium-silicon-tin oxide nanofilms were prepared by atomic layer deposition (ALD), using the lithium bis (trimethylsilyl) amide...

The observed downsizing tendency of microelectronic devices leads to a higher demand in new types of miniaturized energy sources. Thin‐film Li‐ion batteries (LiBs) are promising candidates to fulfil this function. New materials and technologies should be investigated for customized production of miniaturized, high‐efficient solid‐state batteries. I...

The present study is devoted to the development of perspective cathode (LiNiO2) and anode (lithiated SnO2) of solid-state lithium-ion batteries with the use of atomic layer deposition. The program of synthesis included a different number (ratio, 1/1–1/3) of lithium and metal oxide (Ni, Sn) deposition cycles in one supercycle. Lithium hexamethyldisi...

The development of micro-and nanoscale power sources for micro size electronic devices such as wireless sensors, biomedical implants, and smart cards is an important task. In this work, the processes of synthesis uniform lithium oxide, cobalt oxide, and lithium cobalt oxide thin films using atomic layer deposition (ALD) method were studied. Lithium...

Present work is dedicated to the development of lithium-nickel oxide film-positive electrode for solid-state lithium-ion batteries. The formation of electrochemical phase was performed by а two-step process. At first lithium-nickel oxide film was deposited by Atomic Layer Deposition on stainless steel 316SS and silicon wafer at 300 °C. One "supercy...

Lithium-oxygen thin films were deposited by atomic layer deposition (ALD) on the surface of silicon and stainless-steel using lithium bis (trimethylsilyl) amide (LiHMDS) and different counter-reagents (water, ozone, oxygen plasma). The deposited films were non-stable at storage in the air atmosphere. Results of scanning electron microscopy showed t...

Currently, individual implantation is one of the leading and actively developed direction in modern medicine (endoprosthetics, intervertebral cages, carnioimplants, etc.). However, most of the full-metal rigid implants fulfil in the body only a structural function. Such full-metal implants have significant disadvantages, such as lack of living bone...

Structural changes in a promising cathode material LiNi0.8Co0.1Mn0.1O2 for lithium-ion batteries were in situ studied by X-ray diffraction analysis in the course of electrochemical reactions. The Rietveld method and TOPAS 5 software package were used to examine changes in the unit cell parameters of LiNi0.8Co0.1Mn0.1O2 and the reasons for these cha...

Atomic layer deposition (ALD) provides a promising route for depositing uniform thin-film electrodes for Li-ion batteries. In this work, bis(methylcyclopentadienyl) nickel(II) (Ni(MeCp) 2) and bis(cyclopentadienyl) nickel(II) (NiCp 2) were used as precursors for NiO ALD. Oxygen plasma was used as a counter-reactant. The films were studied by spectr...

In recent years atomic layer deposition has proved to be a successful method of fabrication and modification of electrodes for lithium-ion batteries and thin film power sources. Tin oxide demonstrated considerable excellence over currently used materials for thin film batteries anodes, however, lithiated tin oxides are expected to show even better...

The development of nanoscale power sources with a long battery life is now required for novel nanoelectronic devices, such as wireless sensors, biomedical implants, and smart cards. Lithiated metal oxides (Li–Me–O) are widely used in lithium-ion batteries (LIBs). Depending on the type of metal, Li–Me–O can be applied as cathode, anode, or electroly...

Due to the demand for wearable and implantable microelectronic devices (MED), there is growing interest in the development of thin-film lithium-ion microbatteries (LiBs) with high-energy density. The high cost of production is an issue restraining thin-film LiBs’ wide application. Inkjet printing is a method of applying materials to the substrate s...

In this work, we consider influence of synthesis procedures, applying coatings, and formation of core-shell structures on the electrochemical performance of Ni-rich and Li-rich oxides. Li-rich Li1.2Mn0.54Ni0.13Co0.13O2 cathode materials synthesized by different synthesis procedures exhibit different electrochemical behavior, especially those obtain...

Energy accumulators are one of the key directions of research and applied development in the spheres of power generation, saving and efficiency. Lithium-ion batteries (LIB) are widely used in portable power sources for modern electronics. However, currently the most perspective sphere of their use is transport industry. In this article we discuss t...

The parameters of synthesis by the spray method of cathode materials Li1.2Ni0.13Co0.13Mn0.54O2 and Li1.25Ni0.12Co0.12Mn0.51O2, differing in lithium content were studied. The phase and granulometric composition, the morphology of the powder particles obtained, as well as an influence of temperature, total metal concentration, and pH of the solution...

Carbon-coated silica nanoparticles anchored on multi-walled carbon nanotubes (SiO2@C/MWNT composite) were synthesized via a simple and facile sol-gel method followed by heat treatment. Scanning and transmission electron microscopy (SEM and TEM) studies confirmed densely anchoring the carbon-coated SiO2 nanoparticles onto a flexible MWNT conductive...

In this work, a facile strategy to synthesize oxygen and nitrogen co-doped porous carbon (ONPC) is reported by one-step pyrolysis of waste coffee grounds. As-prepared ONPC possesses highly rich micro/mesopores as well as abundant oxygen and nitrogen co-doping, which is applied to sulfur hosts as lithium/sulfur batteries’ appropriate cathodes. In ba...

A novel hierarchically porous silicon film on Cu foil was fabricated by employing the combination of magnetron sputtering deposition and metal-assisted chemical etching technology. The as-prepared porous Si film were directly used as working electrodes without adding of binder or electron conductive agent, which exhibited high specific capacities a...

In this study, thin films of tin dioxide have been synthesized on substrates of silicon and stainless steel by atomic layer deposition (ALD) with tetraethyl tin and by inductively coupled remote oxygen plasma as precursors. Studies of the surface morphology by scanning electron microscopy show a strong dependence on synthesis temperature. According...

Grain size reduction in cemented carbides leads to higher mechanical properties. Therefore, preventing the grain growth during sintering is a crucial task. This study proposes the application of Al2O3 coatings obtained by atomic layer deposition (ALD) on WC-8Co powder, where Al2O3 is added as a grain growth inhibitor. After deposition, the films we...

The authors deposited thin films of tin oxide on substrates of silicon and stainless steel by using atomic layer deposition (ALD) with tetraethyltin precursors. In this process, the authors used various coreactants such as water, oxygen, remote oxygen plasma, hydrogen peroxide, and ozone. The growth rates of films were studied as functions of the d...

Li-ion batteries (LIBs) are widely used as portable power sources. The development of new electrode materials for LIBs is an important challenge for material science. The application of modern methods and approaches can facilitate the implementation of this task. One of the new methods which can be used for improvement of Li-ion batteries is an ato...

Due to variety of applications of tin oxide thin films such as solid state gas sensors, solar cells, transparent conductive oxide coatings, catalysts, and anodes for Li-ion batteries, it is desirable to develop convenient and high effective technique of atomic layer deposition for this material. In this paper we consider in details the prospects of...

Lithium-riched cathode material for lithium-ion batteries, Li1.17Ni0.12Co0.13Mn0.58O2, was synthesized via crystallization from a solution of metal acetates, followed by a thermal treatment of the material obtained as a powder. The phase, elemental, and granulometric compositions of the material were examined, as well as the morphology of the powde...