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Item Open Access 3D PRINTING OF HIGH-PERFORMANCE ELECTRODES FOR ALL-SOLID-STATE RECHARGEABLE LITHIUM-ION BATTERIES(National Laboratory Astana, 2022-08) Nnwaogu, Emmanuel Chisom; Nurpeissova, Arailym; Kalimuldina, Gulnur; Bakenov, ZhumabayThree-Dimensional (3D) electrode architecture of lithium-ion batteries (LIBs) is a new generation energy storage system with high energy and high-power capacity to satisfy high consumer demands, especially for its application in biomedical, electrical vehicles, and portable electronics.Item Open Access ADSORPTION AND DISPLACEMENT OF METHANE IN GRAPHENE-BASED MICROSTRUCTURES: INSIGHT FROM MOLECULAR SIMULATIONS(National Laboratory Astana, 2022-08) Bekeshov, Dias; Ashimov, Sultan; Wang, Yanwei; Wang, LeiShale gas and coalbed methane are alternative energy sources that partly or even mainly consist of methane stored in an adsorbed state in pores of organic-rich rock and coal seams. This study employed a combination of Grand Canonical Monte Carlo (GCMC) and Molecular Dynamics (MD) simulations to investigate the mechanisms of gas adsorption and displacement of methane in coal microstructures, which were modeled as slit pores with the slit walls modelled by graphene layers.Item Open Access ADSORPTION OF POLYETHENE GLYCOL AND PROPYLENE GLYCOL ONTO THE MODIFIED GLASS MICROSPHERES(National Laboratory Astana, 2022-08) Amerkhanova Shamshiya;Since polyethene glycol (PEG) and other derivatives of ethylene oxides are contained in the composition of medicinal and detergents, their large volumes enter water bodies. However, the issue of removing PEG and other polyatomic alcohols from the environment has not been solved yet. This research presents the adsorption of polyethene glycol (PEG) and propylene glycol (PG) on the surface of glass microspheres of the SVJ, SPJ and SMJ brands.Item Open Access ANALYSIS OF RIM-DRIVEN TURBINES: A LITERATURE REVIEW(National Laboratory Astana, 2022-08) Jyeniskhan, Nursultan; Zholdybayev, Akezhan; Arystanbekov, Chingiz; Gouda, SherifOne of the common and convenient methods for generating electricity from the marine environment is extracting energy from the water containing kinetic energy. Due to environmental concerns, rim-driven turbines are proposed, with several advantages such as efficiency due to compact design and reduced failure rates. This review paper aims to evaluate the various aspects of turbines to denote the necessity of applying Rim-driven turbinesItem Open Access APPLICATION OF BIOGENIC ZINC OXIDE NANOPARTICLES IN THE DEGRADATION OF ORGANIC DYES(National Laboratory Astana, 2022-08) Alimkhanova, Assel; Aimanova, Nurgulim; Kitzhan, Azamat; Mashentseva, AnastassiyaHeterogeneous photocatalysis is one of the most popular methods among the variety of different technologies to purify environmental pollutant. The dye Rhodamine B and Alizarin Yellow R are used in many industrial applications and have side effect, when significant amount of the dye is washed off with the wastewater of production during the process, falling into surface reservoirs and destroying the ecosystem.Item Open Access BINDING, REACTION, AND ACTIVATION ENERGIES OF OH- IONS INTERACTING AND REACTING TO SOME HEAD GROUPS OF ANION EXCHANGE MEMBRANE EXPLORED VIA THE DFT METHOD(National Laboratory Astana, 2022-08) Karibayev, Mirat; Myrzakhmetov, Bauyrzhan; Kalybekkyzy, Sandugash; Mentbayeva, Almagul; Wang, YanweiThe main drawback of Anion Exchange Membranes is related to the chemical instability of cationic head groups and the transportation of hydroxide ions at alkaline conditions and elevated temperatures. At this stage, our research was devoted to understanding the stability and transportation mechanism of hydroxide ions in detail and aiming to reach and keep the performance of AEM for a long time. In this regard, the quantum chemical properties for binding of various hydroxide ion-quaternary ammonium (QA) head group systems were investigated by the DFT method in implicit water to get binding energy. Then, the nucleophilic subsition degradation reaction of various hydroxide ion-QA head group systems were studied by the DFT method at the different hydration levels. Finally, the results of the DFT methods were in line with experimental results on chemical stability and ion exchange capacity.Item Open Access BIOMASS GRAPHENE DERIVED FROM DATE SEEDS AS AN ANODE MATERIAL FOR LITHIUM-ION BATTERY(National Laboratory Astana, 2022-08) Tassybay, Kazna; Issatayev, Nurbolat; Kalimuldina, Gulnur; Nurpeissova, Arailym; Bakenov, ZhumabayLithium-ion batteries (LIBs) are in great demand as energy storage systems applied in wide range of electronic devices. However, currently used commercial anodes have a limited capacity of 372 mAh g -1. Therefore, development of novel carbon materials for high performance electrodes is of high interest. Recently, biomasses have attracted much attention as electrode materials for LIBs due to their low cost and environmental sustainability. In this research, a nitrogen-doped porous biomass graphene material was prepared from date seeds as an organic matter through carbonization and chemical activation.Item Open Access BIOMASS-BASED BIOCHAR OBTAINED BY LOW-TEMPERATURE PYROLYSIS IN THE PRESENCE OF METAL OXIDES: PREPARATION, CHARACTERIZATION AND FUTURE APPLICATIONS(National Laboratory Astana, 2022-08) Aitbayeva, Aigerim; Uali, Aitolkyn; Shlyapov, Rustam; Vishnyakov, Alexey; Amerkhanova, ShamshiyaBiochar, which is material obtained from biomass by thermochemical decomposition, is an environmentally friendly replacement for carbon materials. Its applications range from heat and energy production, agriculture and livestock farming to analytical chemistry and analysis. This carbon-enriched material can be obtained by using microwave-assisted pyrolysis, hydrothermal carbonization, pyrolysis, and gasification, thus changing the product's structure and propertiesItem Open Access BIOMASS-DERIVED GRAPHITE AS AN ANODE MATERIAL FOR HIGH-PERFORMANCE LI-ION BATTERIES AT LOW TEMPERATURE(National Laboratory Astana, 2022-08) Issatayev, Nurbolat; Tassybay, Kazna; Kalimuldina, Gulnur; Nurpeissova, Arailym; Bakenov, ZhumabayIn this study, we purpose alternative biomass-derived porous graphitic carbon from date seeds as anode material for a low-temperature lithium-ion battery. The as-obtained graphite was characterized by X-ray diffractometry, scanning electron microscope, Raman scattering and X-ray photoelectron spectroscopy. The honeycombed structure of graphite shortens the diffusion path and provides excellent anode properties, showing high specific capacity at low temperatures.Item Open Access BOOSTING MXENE CAPACITY BY SELF-OXIDATION IN AIR ATMOSPHERE FOR WATER-IN-SALT ELECTROLYTE BASED SUPERCAPACITOR(National Laboratory Astana, 2022-08) Malchik, Fyodor; Maldybayev, Kairgali; Kan, Tatyana; Kokhmetova, Saule; Kurbatov, Andrey; Galeyeva, Alina; Kaupbay, Olzhas; Kiyatova, Marzhan; Shpigel, NetanelThe use of Ti3C2Tx (MXene) electrodes for energy storage applications is gaining momentum in recent years. The ability of the MXene to host a large variety of mono and multivalent ions regardless of their charge or ionic radius makes it an attractive anode for aqueous and non-aqueous batteries and supercapacitor devices.Item Open Access CATALYTIC EFFECTS OF DIFFERENT LOADINGS OF NI NANOPARTICLES ENCAPSULATED IN FEW LAYERS N-DOPED GRAPHENE AND SUPPORTED BY NDOPED GRAPHITIC CARBON IN LI-S BATTERIES(National Laboratory Astana, 2022-08) Baikalov, Nurzhan; Mentbayeva, Almagul; Konarov, Aishuak; Zhang, Yongguang; Bakenov, ZhumabayLithium-ion batteries (LIB), despite the fact that they have opened up new opportunities for the rapid development of modern portable devices, mainly use intercalation cathodes represented by transition metal oxides and phosphates as cathodes, which are unable to meet the requirements of electric vehicles and high energy storage systems and have several disadvantages associated with the high cost of materials and safety problems. In this regard, Lithium-Sulfur batteries (Li-S) have been considered as promising next generation energy storage systems due to high theoretical energy density (2600 Wh kg-1 ) with sufficient operating voltage potential of ~2.1 V (vs Li/Li+ ) alongside its low cost and non-toxicityItem Open Access CELLULOSE MICROFIBERS AS A VERSATILE SUPPORT FOR SHAPE-STABLE PHASE-CHANGE COMPOSITES FOR THERMAL ENERGY STORAGE(National Laboratory Astana, 2022-08) Voronin, Denis; Pirtsul, Alexandra; Mendgaziev, Rais; Rubtsova, Maria; Cherednichenko, Kirill; Shchukin, Dmitry; Vinokurov, VladimirPhase change materials (PCMs) offer an exciting way to facilitate the consumption of renewable and develop responsive energy management by storing and releasing thermal energy as latent heat of reversible phase transitions. Organic PCMs are attractive due to their high latent heat storage capacity and reliability of thermal properties, however, they lack shape stability. In our study, we propose a facile approach for the preparation of that shape-stable phase-change composites by simple adsorption of organic PCMs (as exampled by fatty acids) onto the surface of the supporting cellulose microfibrils (MFC)Item Open Access CHARGE-TRANSPORT MATERIALS IMPACT ON THE PEROVSKITE SOLAR CELLS STABILITY(National Laboratory Astana, 2022-08) Novikov, Artyom; Tepliakova, Marina; Yamilova, Olga; Frolova, Lyubov; Shilov, Gennady; Dremova, Nadezhda; Zhidkov, Ivan; Kurmaev, Ernst; Troshin, Pavel; Stevenson, KeithPerovskite solar cells (PSCs) represent one of the most promising photovoltaic technologies now reaching power conversion efficiency (PCE) values more than 25%. However, their commercialization is still hindered by the poor stability of complex lead halides comprising their active layer. It was shown repeatedly in previous works that charge-transport materials (CTMs) employed in PSCs can affect their operational stability significantly by reacting with the perovskite materials or, in contrast, protecting the perovskite. Yet, to date, there have been no systematic investigation of this issueItem Open Access COMBINATORIAL DEVELOPMENT OF ACTIVE MATERIALS FOR ENERGY STORAGE AND CONVERSION(National Laboratory Astana, 2022-08) Öztürk, Tayfur; Darıcıoğlu, N. Özgür; Akbaş, YiğitActive material development in energy storage and conversion as in similar development other fields of materials research have largely followed Edisonian approach of focusing on one material composition at a time. The approach requires a careful pre-consideration in selecting the material composition and the success depends largely on the suitability of the initial choice made for the material. Combinatorial approach is an alternative method whereby a large number of samples each with different compositions are produced simultaneously...Item Open Access COMPOSITE-TRACK ETCHED MEMBRANES FOR ENVIRONMENTAL APPLICATIONS(National Laboratory Astana, 2022-08) Mashentseva, AnastassiyaThe photocatalytic removal of various classes of organic and inorganic pollutants is one of the most widely used methods due to its high efficiency, low cost and simplicity. The current research in this area is aimed at developing new technologies for producing high-performance and low-cost catalysts. Various types of composite materials have attracted much research attention in the field of photocatalysis owing to their advantages, such as their design flexibility, improved physical and chemical properties and stability.Item Open Access DESIGN OF LOW-SILICA ZEOLITES BASED ON NATURAL HALLOYSITE NANOTUBES(National Laboratory Astana, 2022-08) Rubtsova, Maria; Glotov, Aleksandr; Vinokurov, VladimirIn this work, application of a natural halloysite nanoclay as a source of silicon and aluminum atoms for the synthesis of various low-silica zeolites has been proposed.Item Open Access DETERMINATION OF OPTIMAL SYNTHESIS CONDITIONS OF THE CU@PET COMPOSITES USING TAGUCHI ROBUST EXPERIMENT DESIGN(National Laboratory Astana, 2022-08) Mashentseva, Anastassiya; Zdorovets, MaximIn this task the Taguchi robust design was applied to optimize experimental parameters as well as to determine the optimal conditions for the electroless copper plating. Taguchi robust planning is widely used in the production and study of various technological processes and scientific research, including synthesis of nanomaterials and the study of their properties...Item Open Access DEVELOPMENT OF CORE-SHELL STRUCTURED HCNF/SI ANODE MATERIAL VIA COAXIAL ELECTROSPINNING TECHNIQUE FOR NEW GENERATION OF LITHIUM ION BATTERIES(National Laboratory Astana, 2022-08) Sapar, Nursultan; Yerkinbekova, Yerkezhan; Kalybekkyzy, SandugashSilicon hollow carbon nanofiber (HCNF) anode materials can be considered as a promising alternative for the conventional graphite electrode due to its 10 times higher theoretical capacity (4200 mAh g-1 vs 372 mAh g-1). However, it suffers from the fast capacity loss and limited cycle life because of volume expansion of Si at the lithiation process, therefore a considerable amount of Li ions is irreversibly trapped in the Si active sides. Generally, HCNF with its unique structure could withstand large volume change of Si.Item Open Access EFFECT OF ACID ETCHING OF STAINLESS-STEEL FOILS IN RECHARGEABLE LITHIUM-ION BATTERIES(National Laboratory Astana, 2022-08) Maratova, Kamila; Konarov, Aishuak; Umirov, Nurzhan; Bakenov, ZhumabayResearch into rechargeable aqueous batteries is driven by the need for low-cost, high-safety batteries for large-scale energy storage applications. The effect of current collectors on battery performance is frequently disregarded, despite the fact that the majority of research efforts concentrate on creating electrolyte formulations and electrode materials.Item Open Access EFFECT OF DOPING WITH CATIONS AND ANIONIC GROUPS ON THE IONIC CONDUCTIVITY PROPERTIES OF LATP SOLID ELECTROLYTES FOR LI-ION BATTERIES(National Laboratory Astana, 2022-08) Baltash, Yelnury; Mashekova, A.; Yegamkulov, M.; Trussov, I.; Mukanova, A.The good energy capacity of lithium-ion batteries (LIBs) makes them promising electrochemical energy storage devices. Existing commercial batteries use flammable liquid electrolytes, which are unsafe, toxic and environmentally unsound, and have poor chemical stability. Recently, solid Li-ion conducting ceramic electrolytes have received considerable attention, since they combine high ionic conductivity with low electrical conductivity, chemical stability and potentially sufficient mechanical properties.