Registration Number
0225U000239,
(0124U002182)
, R & D reports
Title
Development of ion-conducting systems and solid polymer electrolytes for electrochemical devices
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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
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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.
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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
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Humenna Mariana A.
Samoilenko Tetiana F.
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2025-01-07
