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Information × Registration Number 0221U105798, 0121U110982 , R & D reports Title Asymmetric aqueous electrolyte supercapacitors based on iron-nickel oxides / reduced graphene oxide nanocomposites and microporous carbon popup.stage_title Head Kotsiubynskyi Volodymyr O., Registration Date 02-09-2021 Organization Vasyl Stefanyk Precarpathian National University, State Higher Educational Institution popup.description2  Research object: the processes of structure formation in the synthesis of porous carbon materials based on raw materials with various lignin content, as well as in the synthesis of composites based on the ultrafine nickel and iron oxides and reduced graphene oxide or porous carbon material by the hydrothermal method and the sol-gel self-combustion method. Research Subject: the establishment of relationships between the synthesis conditions (temperature modes of carbonization and activation, concentration of the activation agent, additional acid treatment or annealing) and the structural, morpho-logical and electrophysical characteristics of carbon materials obtained from raw materials with different lignin contents and composites based on ultrafine complex oxides of nickel and iron and reduced graphene oxide or porous carbon materials. Research methods: small-angle X-ray scattering, Raman spectroscopy, adsorption porosimetry, XRD, impedance spectroscopy, Mössbauer spectroscopy. Results and novelty: The main result is the development of methods for obtaining nitrogen-doped porous carbon nanomaterials in order to establish the effect of synthesis conditions (temperature modes of carbonization and activation, concentration of the activation agent, conditions for the formation of surface nitrogen-containing functional groups) on the morphological characteristics of carbon materials, obtained on the basis of plant raw materials. A comparative analysis of the influence of the characteristics of the composition of raw materials (lignin content) on porosity, structural ordering, electrophysical properties and surface condition of carbon nanomaterials has been carried out with the establishment of a set of conditions necessary for obtaining materials with a controlled specific surface area and a predictable ratio of micro- and mesopores. The synthesis of ultrafine complex oxides of nickel and iron, as well as their composites with reduced graphene oxide and carbon has been Product Description popup.authors Ivanichok Nataliia Ya. Boychuk Volodymyra Budzulyak Ivan Myhajlovych Hod¬levska Myroslava Kolkovskyi Pavlo Igorovych Malachov Andrii Popovich Olga Mikhaylovna Rachii Bohdan Ivanovych popup.nrat_date 2021-09-02 Close