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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)

Nafion-212 Membrane Solvated by Ethylene and Propylene Carbonates as Electrolyte for Lithium Metal Batteries

2023 · ARTICLE · en

The use of cation-exchange membranes as electrolytes for lithium metal batteries can prevent the formation of lithium dendrites during extended cycling and guarantee safe battery operation. In our study, the Nafion-212 membrane in lithium form solvated by a mixture of ethylene carbonate and propylene carbonate (EC-PC) was used as an electrolyte in a lithium metal battery with the LiFePO4 cathode. The Nafion-212-EC-PC electrolyte is electrochemically stable up to 6 V, indicating its suitability for high-energy density batteries. It has an ionic conductivity of 1.9 × 10−4 S/cm at 25 °C and a high lithium transference number. The symmetric Li|Nafion-212-EC-PC|Li cell shows a very low overvoltage of ~0.3 V at a current density of ±0.1 mA/cm2. At 25 °C, the LiFePO4|Nafion-212-EC-PC|Li battery exhibits a capacity of 141, 136, 125, and 100 mAh/g at 0.1, 0.2, 0.5, and 1C rates, respectively. It maintains a capacity of 120 mAh/g at 0 °C and 0.1C with stable performance for 50 charge/discharge cycles. The mechanism of conductivity and capacity retention at low temperatures is discussed.

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The time to learn. To Oleg Matveevich Nefedov: scientist, organizer, and teacher

2022 · ARTICLE · en

Probably, humans are called Homo sapiens because they learn something throughout the whole life. As soon as we are born, we begin to be aware of the surrounding world bit by bit, then we go to school, to the institute, and to post-graduate courses. However, it is important that, having reached a certain level, a person begins to help others and, hence, actively teaches them. The main thing is that we have something to share. There is certainly a lot to learn from such remarkable scientists as Oleg Matveevich Nefedov (Fig. 1). He has a plethora of disciples whom he trained for science and brought up for life.

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Multisensory Systems Based on Perfluorosulfonic Acid Membranes Modified with Polyaniline and PEDOT for Multicomponent Analysis of Sulfacetamide Pharmaceuticals

2022 · ARTICLE · en

The degradation of sulfacetamide with the formation of sulfanilamide leads to a deterioration in the quality of pharmaceuticals. In this work, potentiometric sensors for the simultaneous determination of sulfanilamide, sulfacetamide and inorganic ions, and for assessing the degradation of pharmaceuticals were developed. A multisensory approach was used for this purpose. The sensor cross-sensitivity to related analytes was achieved using perfluorosulfonic acid membranes with poly(3,4-ethylenedioxythiophene) or polyaniline as dopants. The composite membranes were prepared by oxidative polymerization and characterized using FTIR and UV-Vis spectroscopy, and SEM. The influence of the preparation procedure and the dopant concentration on the membrane hydrophilicity, ion-exchange capacity, water uptake, and transport properties was investigated. The characteristics of the potentiometric sensors in aqueous solutions containing sulfanilamide, sulfacetamide and alkali metals ions in a wide pH range were established. The introduction of proton-acceptor groups and π-conjugated moieties into the perfluorosulfonic acid membranes increased the sensor sensitivity to organic analytes. The relative errors of sulfacetamide and sulfanilamide determination in the UV-degraded eye drops were 1.2 to 1.4 and 1.7 to 4%, respectively, at relative standard deviation of 6 to 9%.

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Perfluorosulfonic Acid Membrane for Lithium–Sulfur Batteries with S/C Cathodes

2022 · ARTICLE · en

Polymer electrolyte based on Nafion-117 membranes in the Li+ form with intercalated 1,3-dioxolane-dimethoxyethane solvent mixtures (DOL-DME) has been obtained. The obtained electrolyte Nafion-Li+-DOL-DME has been characterized by DSC analysis, IR- and impedance spectroscopy. The solvent uptake of membrane in the DOL-DME mixture amounts to 1.9. Nafion-Li+-DOL-DME is characterized by an ionic conductivity ~10􀀀7 S cm􀀀1 at room temperature. The comparative study of the electrochemical properties of Li–S batteries with liquid electrolyte (1M Li(CF3SO2)2N in DOL-DME) with polypropylene film (PP) or Nafion-Li+-DOL-DME and S/C composites with mesoporous carbon as cathode materials has shown that the use of membrane can improve cyclability of the cell. The first-cycle discharge capacities of S/C electrodes in the Li–S battery cells with PP and Nafion-Li+-DOL-DME were 730 and 450 mAh g􀀀1, respectively (0.1 mV s􀀀1). However, the discharge capacity of S/C in the cell with PP reduced significantly after 10 cycles. The Li–S battery with the use of membrane exhibits significantly enhanced cyclability. The discharge capacity of S/C in the cell with Nafion-Li+-DOL-DME amounts to 365 mAh g􀀀1 after 10 cycles and to up to 290 mAh g􀀀1 after 40 cycles.

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Катодные материалы состава LiFePO4/C/Ag, полученные методом Печини

2022 · ARTICLE · ru

С помощью метода Печини синтезированы композиты на основе LiFePO4 со структурой оливина с уг- леродным покрытием. Полученные материалы аттестованы с помощью рентгенофазового анализа, ска- нирующей электронной микроскопии, термогравиметрического анализа и спектроскопии комбинаци- онного рассеяния. Оптимизирован процесс термической обработки прекурсора LiFePO4. В результате получен LiFePO4 со структурой оливина с размером первичных частиц ~30 нм. Добавление к композиту 0.2 мас. % серебра приводит к получению катодного материала с улучшенными электрохимическими характеристиками. Полученный материал характеризуется значениями разрядной емкости 165, 85 и 53 мАч/г при плотности тока циклирования 20 (С/8), 1600 (10С) и 3200 (20С) мА/г.

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Recent progress in lithium-ion and lithium metal batteries

2022 · ARTICLE · en

Moving towards carbon-free energy and global commercialization of electric vehicles stimulated extensive development in the field of lithium-ion batteries (LIBs), and to date, many scientific and technological advances have been achieved. The number of research works devoted to developing high-capacity and stable materials for lithiumion and lithium metal batteries (LMBs) is constantly rising. This review covers the main progress in the development of LIBs and LMBs based on research works published in 2021. One of the main goals in the recent publications is to solve the problem of instability of layered nickel-rich lithium–nickel–cobalt–manganese oxides (Ni-rich NMC) cathodes, as well as silicon anodes. Improving the stability of NMC cathodes can be achieved by doping them with cations as well as by coating the oxides’ surfaces with protective layers (organic polymers and inorganic materials). The most effective strategies for dampening volumetric changes in silicon anodes include using porous silicon structures, obtaining composites with carbon, coating silicon-containing particles with inorganic or polymeric materials, and replacing standard binder materials. Much work has been devoted to suppressing dendrite formation in LMBs by forming stable coating layers on the surface of lithium metal, preparing composite anodes and alloys, and changing the composition of electrolytes. At the same time, in the field of electrolyte development, many research works have been devoted to the search for new hybrid polymer electrolytes containing lithium-conducting inorganic materials.

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О влиянии растворителя и предварительной ультразвуковой обработки на свойства мембран Nafion®, полученных методом отливки

2022 · ARTICLE · ru

В статье описано влияние природы растворителя на примере полярных протонных (вода) и апро- тонных (N,N-диметилформамид (ДМФА) и N,N-диметилацетамид (ДМА)) жидкостей на свойства мембран Nafion, полученных из них методом отливки. Влагосодержание и протонная проводимость мембран Nafion, полученных из водной дисперсии, существенно выше, чем из дисперсий в ДМФА и ДМА, однако их механические свойства и стабильность обычно оказываются невысокими. Не- продолжительная ультразвуковая (УЗ) обработка дисперсий Nafion в ДМФА и ДМА позволяет по- высить проводимость мембран и снизить энергию ее активации. Это происходит из-за улучшения микроструктуры мембран за счет деагломерации макромолекул. Присутствие воды при УЗ обработ- ке дисперсий Nafion приводит к увеличению их вязкости и потере большого количества функцио- нальных сульфогрупп. В результате этого снижается проводимость мембран. Для нивелирования этих процессов целесообразно использовать апротонные жидкости или смеси с небольшим содер- жанием воды. Предложено объяснение влияния природы диспергирующей жидкости и УЗ обработ- ки на свойства мембран Nafion с точки зрения морфологии полимера в дисперсии и в пленке.

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Polystyrene-Based Single-Ion Conducting Polymer Electrolyte for Lithium Metal Batteries

2022 · ARTICLE · en

Lithium metal batteries are one of the more promising replacements for lithium-ion batteries owing to their ability to reach high energy densities. The main problem limiting their commercial application is the formation of dendrites, which significantly reduces their durability and renders the batteries unsafe. In the present work, we used a single-ion conducting gel polymer electrolyte based on a poly(ethylene-ran-butylene)-block-polystyrene (SEBS) block copolymer, which was functionalized with benzenesulfonylimide anions and plasticized by a mixture of ethylene carbonate and dimethylacetamide (SSEBS-Ph-EC-DMA), with a solvent uptake of 160% (~12 solvent molecules per one functional group of the membrane). The SSEBS-Ph-EC-DMA electrolyte exhibits an ionic conductivity of 0.6 mSmcm􀀀1 at 25 C and appears to be a cationic conductor (TLi+ = 0.72). SSEBSPh- EC-DMA is electrochemically stable up to 4.1 V. Symmetrical Li|Li cells; further, with regard to SSEBS-Ph-EC-DMA membrane electrolytes, it showed a good performance (~0.10 V at first cycles and EC-DMA|Li battery showed discharge capacity values of 100 mAhg􀀀1 and a 100% Coulomb efficiency, at a cycling rate of 0.1C.

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Composite Cathodes Based on Lithium-Iron Phosphate and N-Doped Carbon Materials

2022 · ARTICLE · en

The effect of different nitrogen-doped carbon additives (carbon coating from polyaniline, N-doped carbon nanotubes, and N-doped carbon nanoparticles) on electrochemical performance of nanocomposites based on the olivine-type LiFePO4 was investigated. Prepared materials were characterized by XRD, SEM, TGA-MS, CHNS-analysis, IR-, Raman, and impedance spectroscopies. Polyaniline deposition on the LiFePO4 precursor with following annealing lead to the formation of a LiFePO4/C nanocomposite with a carbon coating doped with nitrogen. Due to nitrogen atoms presence in carbon coating, the LiFePO4/N-doped carbon nanocomposites showed enhanced conductivity and C-rate capability. The discharge capacities of the synthesized materials in LIBs were close to the theoretical value at 0.1 C and retained high values with increasing current density. At high C-rates, the best results were obtained for a more dispersed LiFePO4/C composite with carbon coating prepared from polyaniline previously in situ deposited on LiFePO4 precursor particles. Its discharge capacity reached 96, 84, 73, and 47 mAh g􀀀1 at 5, 10, 20, and 60 C-rates, respectively.

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The way to increase the monovalent ion selectivity of FujiFilm® anion-exchange membranes by cerium phosphate modification for electrodialysis desalination

2022 · ARTICLE · en

Recently, the selectivity of ion-exchange membranes and its control have been the subject of numerous fundamental and applied studies. This paper reports an enhanced monovalent anion selectivity of hybrid membrane based on the FujiFilm® Type I anion-exchange membrane and in situ synthesized cerium phosphate (CeP) with a gradient distribution over the membrane thickness. The Cl/SO4-selectivity coefficient (P(Cl/SO4)) of hybrid membranes reached 6.2. The effect of modification on the Cl/SO4 selectivity passed through a minimum as the total concentration of the external solution increased from 0.04 M to 1 M. For low concentration electrolytes, Cl/SO4-selectivity improving was attributed to partial neutralization of positive fixed charges by negative fixed charges of cerium phosphate, which causes an effective decrease of ion-exchange capacity and reduction of electrostatic selectivity factor favouring sulfate transport; for high concentration electrolytes, to the formation of narrow transport channel between the surface of the inorganic nanoparticle and the pore wall, which causes a decrease of sulfate transport due to the size sieving effect. The hybrid membranes and cerium phosphate were characterized using ATR FTIR and 31P MAS NMR spectroscopy, XRD analysis and scanning electron microscopy with EDX microanalysis.

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Курсы (6)