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Information × Registration Number 0225U000239, (0124U002182) , R & D reports Title Development of ion-conducting systems and solid polymer electrolytes for electrochemical devices popup.stage_title Синтез олігомерних йонних рідин і йоноактивних полімерів та отримання мембран на їх основі Head Tkachenko Ihor M., Доктор хімічних наук Registration Date 07-01-2025 Organization Institute of Chemistry of Macromolecular Compounds of the National Academy of Sciences of Ukraine popup.description1 Development of methods for creating ion-exchange media and polymer membranes as key elements of electrochemical devices for various purposes (fuel cells, electrolyzers, supercapacitors), as well as to determine ways of directional regulation of the structure and properties of the obtained ion-exchange systems. popup.description2  During the first stage of the work, mixtures of oligomeric silsesquioxanes with an inorganic component in the form of fully and partially condensed polyhedral structures and their open-chain analogs, as well as an organic component containing sulfonic acid (OSS-SO3H) or carboxylic groups (OSS-COOH), were designed and synthesized. By neutralizing the synthesized silsesquioxane oligomeric acids with equivalent amounts of N-methylimidazole and triethanolamine, anionic proton-conducting oligomeric silsesquioxanes were synthesized with counterions of heterocyclic and aliphatic nature. Phenolic-type monomers were synthesized having a central tetrafluorobenzene core and side fragments with methylenemorpholine or methylenepiperidine groups. A method for synthesizing copolymeric poly(arylene ether)s with tertiary nitrogen atoms based on these monomers was developed. Through the reaction of methyl iodide with these polymers, cationic polyethers with quaternary ammonium groups were synthesized, and subsequent treatment with alkali produced the corresponding highmolecular- weight ammonium bases. Additionally, a novel branched poly(arylpiperidinium) polymer (B-PAP) was synthesized, and its cationic form was produced via the quaternization of the neutral B-PAP with iodomethane in a dimethyl sulfoxide solution. Thin-film electrodes for supercapacitors were fabricated based on hydroxyl-containing aprotic silsesquioxane oligomeric ionic liquids and two-dimensional titanium carbide (MXene, Ti3C2Tx) nanosheets. Their use in two-electrode solid-state supercapacitors led to a 400% enhancement in specific capacitance compared to electrodes made of unmodified MXene. Furthermore, the MXene/silsesquioxane oligomeric ionic liquid electrodes demonstrated excellent stability under prolonged cyclic loading, retaining 91% of their capacitance after 10 000 cycles. Product Description popup.authors Humenna Mariana A. Samoilenko Tetiana F. popup.nrat_date 2025-01-07 Close