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Ярославцев Андрей Борисович

Базовая кафедра неорганической химии и материаловедения Института общей и неорганической химии им. Н.С. Курнакова РАН

Профиль на hse.ru ↗ тел.: 23530
Публикаций
90
Языков
1
Наград
8
Конференций
1
Профиль Публикации (90) Курсы (6)

Профессиональные интересы

мембраныИонная проводимость

Должности

  • Заведующий кафедрой — Базовая кафедра неорганической химии и материаловедения Института общей и неорганической химии им. Н.С. Курнакова РАН
  • Профессор — Базовая кафедра неорганической химии и материаловедения Института общей и неорганической химии им. Н.С. Курнакова РАН
  • Академический директор — Аспирантская школа по химии

Био

  • · Начал работать в НИУ ВШЭ в 2009 году.
  • · Научно-педагогический стаж: 33 года.

Образование

  • 2006 · Член-корреспондент РАН
  • 1995 · Ученое звание: Профессор
  • 1995 · Доктор наук
  • 1978 · Специалитет: Московский государственный университет им. М.В. Ломоносова, специальность «Химия», квалификация «Химик»

Опыт работы

  • · 1994-2018: Институт общей и неорганической химии РАН им. Н.С. Курнакова:
  • · Ведущий научный сотрудник, Заведующий сектором, Заведующий лабораторией, Главный научный сотрудник
  • · 2010-2018: Институт нефтехимического синтеза РАН им. А.В. Топчиева:
  • · Заведующий лабораторией
  • · 1997-2009: Российский фонд фундаментальных исследований:
  • · Начальник отдела, Ответственный секретарь
  • · 1994-2018: Российский химико-технологический университет им. Д.И.Менделеева:
  • · Профессор
  • · 2009-2018: Московский государственный университет им. М.В.Ломоносова:
  • · Младший научный сотрудник, ассистент, доцент, профессор

Награды и поощрения

  • · Почетная грамота НИУ ВШЭ (март 2026)
  • · Благодарность НИУ ВШЭ (март 2024)
  • · Медаль Ордена "За заслуги перед Отечеством" II степени (февраль 2024)
  • · Благодарность Факультета химии НИУ ВШЭ (февраль 2023)
  • · Благодарственное письмо проректора НИУ ВШЭ (ноябрь 2021)
  • · Надбавка за публикацию в журнале из Списка А (и приравненном к нему научном издании) (2025–2026, 2024–2025, 2023–2024)
  • · Надбавка за публикацию в международном рецензируемом научном издании (2022–2023, 2021–2022, 2019–2020)
  • · Лучший преподаватель — 2025

Гранты и проекты

  • — · на соискание учёной степени кандидата наук

Конференции (1)

Показать все
  • · 2018: 14th International Conference “Fundamental problems of solid state ionics” (Черноголовка). Доклад: Ion transport in composite membranes based on polybenzimidazoles and silica with modified surface

Идентификаторы исследователя

  • ORCID: 0000-0001-8446-6198
  • ResearcherID: C-2070-2013
  • SPIN РИНЦ: 8429-8844
  • Scopus AuthorID: 7005239278

Публикации (90)

СИНТЕЗ И ИОННАЯ ПРОВОДИМОСТЬ ТВЕРДЫХ ЭЛЕКТРОЛИТОВ НА ОСНОВЕ ФОСФАТА ЛИТИЯ-ТИТАНА

2021 · ARTICLE · ru

Изучены процессы, протекающие в ходе твердофазного синтеза фосфата лития-титана, допирован- ного германием. Установлено, что формирование LiTi2 – xGex(PO4)3 протекает через промежуточ- ное образование пирофосфата титана с последующим его превращением в материалы со структурой NASICON, которое завершается при 1073 К. Для получения керамики с оптимальной проводимо- стью необходим отжиг при 1173 К. На основании полученных результатов разработана методика двухстадийного синтеза. Максимальными величинами ионной проводимости (3.9 × 10–5 См/см при 433 К) и минимальной энергией ее активации (46 ± 1 кДж/моль) характеризуются образцы LiTi2 –xGex(PO4)3 со степенью замещения титана 20–25% (х = 0.4–0.5). Можно полагать, что это яв- ляется следствием достижения оптимального размера каналов, по которым осуществляется пере- нос лития.

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Ion exchange membranes based on radiation-induced grafted functionalized polystyrene for high-performance reverse electrodialysis

2021 · ARTICLE · en

Radiation-induced grafted ion exchange membranes based on functionalized polystyrene were tested for the first time in reverse electrodialysis (RED). Сation and anion exchange membranes based on sulfonated and quaternized/chloromethylated poly(styrene-co-divinylbenzene) grafted on UV-oxidized polymethylpentene films with different conductivity and selectivity relationships were compared with each other and with different commercial ion-exchange membranes (IEMs), FujiFim® Type 1 and Type 2 and RALEX®. The synthesized grafted membranes provided the highest power density of lab-scale stacks with a total active membrane area of 72 cm² with the use of 0.1 М/1 М NaCl (0.67 W m⁻²) and 0.1 М/5 М NaCl (2.1 W m⁻²) solutions. The use of grafted membranes with a low resistance ~0.5 Ω cm² (0.5 М NaCl, 25 °C) did not benefit the stack resistance; the low selectivity of such membranes resulted in a lower voltage and a high non-selective diffusion current of the RED stack. Higher power densities and current efficiencies in some model systems are observed for stacks with grafted membranes with lower conductivity and higher selectivity.

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Nafion/Surface Modified Ceria Hybrid Membranes for Fuel Cell Application

2021 · ARTICLE · en

Low chemical durability of proton exchange membranes is one the main factors limiting their lifetime in fuel cells. Ceria nanoparticles are the most common free radical scavengers. In this work, hybrid membranes based on Nafion-117 membrane and sulfonic or phosphoric acid functionalized ceria synthesized from various precursors were prepared by the in situ method for the first time. Ceria introduction led to a slight decrease in conductivity of hybrid membranes in contact with water. At the same time, conductivity of membranes containing sulfonic acid modified ceria exceeded that of the pristine Nafion-117 membrane at 30% relative humidity (RH). Hydrogen permeability decreased for composite membranes with ceria synthesized from cerium (III) nitrate, which correlates with their water uptake. In hydrogen-air fuel cells, membrane electrode assembly fabricated with the hybrid membrane containing ceria synthesized from cerium (IV) sulfate exhibited a peak power density of 433 mW/cm2 at a current density of 1080 mA/cm2, while operating at 60 °C and 70% RH. It was 1.5 times higher than for the pristine Nafion-117 membrane (287 mW/cm2 at a current density of 714 mA/cm2).

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Мембраны МФ-4СК, модифицированные полианилином, для потенциометрического определения ионов сахарина и натрия в водных растворах

2021 · ARTICLE · ru

Методом окислительной полимеризации выполнена модификация мембран МФ-4СК полианилином (PANI). Изучено влияние способа получения композиционных мембран и содержания в них PANI на величину ионообменной емкости, влагосодержание и транспортные свойства. Исследованы характеристики ПД-сенсоров (ПД – потенциал Доннана) на основе полученных мембран в водных растворах, содержащих ионы сахарина и натрия, при рН

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The effect of ultrasonication of polymer solutions on the performance of hybrid perfluorinated sulfonic acid membranes with SiO2 nanoparticles

2021 · ARTICLE · en

Perfluorinated sulfonic acid (PFSA) polymer membranes are widely used as ion-conducting electrolytes in energy-conversion devices. The development of novel hybrid materials containing inorganic dopants offers the route towards optimization of the performance of the PFSA membranes. In this work, the effect of ultrasonic (US) treatment of the PFSA solutions in the presence of SiO2 nanoparticles on the characteristics of the cast hybrid Nafion+SiO2 membranes was studied for the first time. Upon ultrasonication of polymer solutions, the length of macromolecules is reduced, and the number of sulfo groups decreases. When polymer solutions are ultrasonicated in the presence of SiO2, they experience additional crosslinking due to the interaction of SiO2 with sulfo groups of the PFSA polymer. As a result, up to 20% of -SO3H groups appears to be excluded from the ionexchange process, and the temperature corresponding to destabilization of ionic clusters is reduced. When a hydrophilic dopant is incorporated within pores, the overall water uptake of the hybrid membranes increases, and their proton conductivity is improved. Maximum conductivity (78.6 mS/cm) at 40◦С in the contact with water is observed for the Nafion+1 wt% SiO2 membrane cast from polymer solutions upon the ultrasonication for 10 min. The membranes preserve their high conductivity at low relative humidity (4.1 mS/cm at 30◦С, 30% RH), and this value is 1.7 times higher than that of the pristine Nafion membrane. Hydrogen permeability of the hybrid Nafion+SiO2 membranes appears to be lower than that of the Nafion membranes by 15%. Hence, USassisted dispersion of dopant nanoparticles in the PFSA solutions allows preparation of hybrid membranes with improved transport characteristics.

Novel anion exchange membrane with low ionic resistance based on chloromethylated/quaternized‐grafted polystyrene for energy efficient electromembrane processes

2020 · ARTICLE · en

A novel anion-exchange membrane has been manufactured by chloromethylation and subsequent quaternization of polystyrene within a graft copolymer films based on UV-oxidized polymethylpentene. Particular attention is given to the kinetics of chloromethylation and the influence of the reaction conditions on the properties of the anion-exchange membranes. By means of variation of the polystyrene content and its crosslinking degree we have obtained membranes that have an ion-exchange capacity from 1.1 to 2.9 mmole g−1, anion transport numbers between 91.0 and 95.5% and specific ionic conductivities (σ25 Cl− Þ ranging from 2 to 25 mS cm−1. The developed membranes due to their low thickness and high conductivities have a remarkably low surface ionic resistance of around 0.6 Ωcm2. It was calculated that the use of the developed materials will increase the efficiency of reverse electrodialysis energy production by 8–10% compared to the state of the art membranes.

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Membranes with novel highly-delocalized sulfonylimide anions for lithium-ion batteries

2020 · ARTICLE · en

Cation-exchange membranes containing sulfo R–SO3M and sulfonylimide functional groups [R–SO2NSO2–X]M, where X¼CCl3, CF3, Ph, p-NO2Ph, p-CF3Ph and Mþ¼Li/Na/H, have been synthesized by the Hinsberg reaction from the polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene block copolymer. The obtained membranes have been characterized using ATR IR spectroscopy, CHNS elemental analysis, TGA, DSC, SEM and X-ray diffraction analysis, as well as mechanical properties were determined. Ionic conductivity of plasticized polymer electrolytes, containing mixtures of ethylene carbonate, propylene carbonate and ethylene carbonate, dimethylacetamide were investigated by impedance spectroscopy. It was demonstrated that membranes containing trifluorosulfonylimide functional groups have the highest ionic conductivity. The maximum ionic conductivity at 25C was observed for the membrane in contact with an ethylene carbonate – dimethylacetamide mixture.

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Hybrid membranes based on polybenzimidazoles and silica with imidazoline-functionalized surface, candidates for fuel cells applications

2020 · ARTICLE · en

Hybrid membranes were prepared by incorporating silica with propyl-imidazoline groups in polybenzimidazoles (phthalide-containing PBI or PBI based on 2,6- or 2,5-pyridinedicarboxylic acids). The influence effects of the silica precursor hydrolysis conditions on the conductivity of the hybrid membranes are studied. Ionic conductivity, water uptake, phosphoric acid doping, and gas permeability of the obtained materials were found to depend on the preparation method and the silica loading. The materials with 10 wt% of functionalized silica present the highest conductivity. A decrease of hydrogen permeability is observed for low silica loadings.

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Membrane materials for energy production and storage

2020 · ARTICLE · en

Ion exchange membranes are widely used in chemical power sources, including fuel cells, redox batteries, reverse electrodialysis devices and lithium-ion batteries. The general requirements for them are high ionic conductivity and selectivity of transport processes. Heterogeneous membranes are much cheaper but less selective due to the secondary porosity with large pore size. The composition of grafted membranes is almost identical to heterogeneous ones. But they are more selective due to the lack of secondary porosity. The conductivity of ion exchange membranes can be improved by their modification via nanoparticle incorporation. Hybrid membranes exhibit suppressed transport of co-ions and fuel gases. Highly selective composite membranes can be synthesized by incorporating nanoparticles with modified surface. Furthermore, the increase in the conductivity of hybrid membranes at low humidity is a significant advantage for fuel cell application. Proton-conducting membranes in the lithium form intercalated with aprotic solvents can be used in lithium-ion batteries and make them more safe. In this review, we summarize recent progress in the synthesis, and modification and transport properties of ion exchange membranes, their transport properties, methods of preparation and modification. Their application in fuel cells, reverse electrodialysis devices and lithium-ion batteries is also reviewed.

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Development of surface-sulfonated graft anion-exchange membranes with monovalent ion selectivity and antifouling properties for electromembrane processes

2020 · ARTICLE · en

This communication describes the development of anion-exchange membrane (AEM) with a modified surface possessing monovalent ion selectivity and antifouling properties. Modified AEMs series was obtained by the formation of an oppositely-charged thin layer utilizing the surface sulfonation of the grafted AEMs. The creation of the interface layer leads to a significant increase in the Cl/SO4 selectivity and the appearance of humic acid sorption resistance. The surface-sulfonated anion-exchange membrane (s-AEM) has a high ionic conductivity of 11.2 mS cm−1 and high Cl/SO4 selectivity up to 6.4 in electrodialysis. The sulfonated layer was characterized by IR spectroscopy and electron microscopy. The relationship between the structure and thickness of the cation-exchange surface layer and the observed changes in membrane transport properties such as diffusion permeability, ionic conductivity, potentiometric transport numbers, and current-voltage characteristics are discussed. It was shown that the Cl/SO4 selectivity of s-AEM in the desalination process depends on the current density. The obtained data were successfully interpreted using a mathematical model based on the concept of the bipolar structure of the s-AEM surface layer and diffusion control of anion transport through it.

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Курсы (6)