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Conductivity of Nafion-117 membranes intercalated by polar aprotonic solvents
Ionics. 2018. Vol. 24. No. 6. P. 1685–1692.
The Nafion-117 membranes in the Li+ form with pore-intercalated aprotonic organic solvents were prepared. The prepared materials were characterized by IR, impedance, and 7Li NMR spectroscopy. The solvent uptake of the membranes is shown to be controlled by the composition of organic solvents and their mixtures as well as by the conditions of the preliminary treatment of the initial membranes. For the Nafion-117 membrane, the degree of solvation can be improved by the preliminary treatment with alcohols, especially by the thermal treatment in methanol. Conductivity of the membranes is shown to increase with increasing content of the sorbed solvents. The best conductivity at 25 °C (2.5 × 10−3 and 1.6 × 10−3 S cm−1) was attained for the electrolytes based on the Nafion-117 membrane in lithium form with sorbed ethylene carbonate-propylene carbonate and ethylene carbonate-dimethoxyethane mixtures, respectively.
Makarov D. M., Kalikin N., Fashchevsky K. A. et al., Electrochimica Acta 2026 Vol. 579 Article 150159
Machine learning (ML) has become a powerful tool for accelerating the development of carbon-based supercapacitors;
however, most published models assume that a single predictive framework can describe both conventional
porous carbons and hybrid carbon electrodes. Here, we test this assumption using a comprehensive
benchmark dataset and an extended literature-curated dataset enriched with synthesis- and electrolyte-related
descriptors. Three ML algorithms ...
Added: October 13, 2026
Shi R., Yu Y., Chibisov A., International Journal of Hydrogen Energy 2025 Vol. 107 P. 52–62
Cyanide containing wastewater can cause livestock death and reduce agricultural production and electrochemical reduction of cyanide (CNRR) is a promising way to eliminate its harm and turn waste into valuable products. However, the reaction mechanism and function of electrocatalysts for CNRR have not been fully understood yet. Herein we identify a two-dimensional (2D) conductive copper-organic ...
Added: October 11, 2026
Zhukov A., Chen F., Zeng Y. et al., Nanoscale 2026 Vol. 18 No. 36 P. 19223–19253
Colloidal semiconductor nanocrystals have emerged as promising materials for next-generation light-emitting diodes (LEDs) owing to their solution processability, tunable emission wavelengths, narrow emission linewidths, and high photoluminescence quantum yields. Among them, anisotropic nanocrystals, including one-dimensional nanorods (NRs) and two-dimensional nanoplatelets (NPLs), offer additional opportunities for controlling transition dipole moment orientation and light out-coupling efficiency. These ...
Added: October 2, 2026
Мальцева В. Е., Ananyev I., Milevskii N. et al., Molecular Systems Design and Engineering 2026 Vol. 11 No. 7 P. 691–704
The use of hydrophobic deep eutectic solvents (DESs) as extractants for metal ion separation is largely due to the ease of their preparation and the possibility of modifying them depending on the composition of the metal mixture to be separated. However, the most common approach to DES modification involves the replacement of the extractant, while ...
Added: October 2, 2026
Мальцева В. Е., Ananyev I., Golubev A. V. et al., Russian Journal of Inorganic Chemistry 2026 Vol. 71 P. 724–736
Two voluminous polymer silver(I) salts of perchlorinated dodecoborate clusters, {[(Me2CO)Ag(μ-Me2CO)2Ag(Me2CO)][μ-B12Cl12]}n (1) and {[DMFAg(μ-DMF)2AgDMF][μ-B12Cl12]}n (2) were synthesized. The 35Cl nuclear quadrupole resonance (NQR) spectroscopy supplemented with the X-ray diffraction data was applied for identifying and analyzing noncovalent interactions Cl···X in these salts. Whereas in X-ray diffraction, noncovalent interactions are associated with the presence of the shortened ...
Added: October 2, 2026
Мальцева В. Е., Rozhkov A., Ananyev I. et al., Inorganic Chemistry 2026 Vol. 65 No. 22 P. 12484–12496
Despite the well-established importance of chalcogen bonding in crystal engineering and supramolecular chemistry, experimental charge density data for TeII-centered chalcogen bonds have remained entirely absent, leaving the electronic nature of these interactions uncharacterized at the level of directly measured electron density. Here, we report the first high-resolution X-ray diffraction (HRXRD) study of TeII-centered chalcogen bonds, ...
Added: October 2, 2026
Ostovari Moghaddam A., Mehrabi-Kalajahi S., Solizoda I. A. et al., Metals and Materials International 2026 P. 1–9
Off-stoichiometric boron-doped chemically complex intermetallic alloys (CCIMAs) have recently emerged as a new avenue for overcoming the low temperature brittleness of ordered superlattices. However, their behavior at high temperatures remains unexplored. In this study, a novel (Ni39.6Co29.3Cr10Al15.8Ta3.3Nb2)98.5B1.5 CCIMA was prepared and its oxidation resistance over a wide temperature range (500 °C–950 °C) was studied. The ...
Added: October 1, 2026
Kashpurovich I., Oleynichenko A., Stegailov V., Supercomputing Frontiers and Innovations 2026 Vol. 13 No. 1 P. 52–73
We report a high-performance implementation of the resolution-of-the-identity Hartree–Fock method that fully exploits the permutational symmetry of three-center electron repulsion integrals (ERI). The present implementation adopts a hybrid MPI+OpenMP parallelization strategy. Two different algorithmic approaches (with and without the pre-transformation of ERIs) are compared. A custom data layout introduced previously is employed. Designed to efficiently ...
Added: September 28, 2026
Li Y., Han J., Zaman N. et al., ACS Applied Materials & Interfaces 2026 Vol. 18 No. 39 P. 54241–54251
The development of lead sulfide (PbS) quantum dot (QD) photodetectors for short-wave infrared (SWIR) applications has been fundamentally limited by the thermodynamic instability of large PbS QD facets, which leads to aggregation and epitaxial fusion. In this work, robust thermodynamic stabilization was achieved by introducing methylammonium chloride (MACl) in PbS QD surface passivation, as validated ...
Added: September 26, 2026
Voropaeva D., S. Novikova, I. Stenina et al., Solid State Ionics 2026 Vol. 445 Article 117288
Composite gel polymer electrolytes based on a perfluorinated sulfonic acid cation-exchange MF-4SC membrane
containing surface-sulfonated nanoparticles of aluminum oxide, cerium (IV) oxide, and titanium oxide (sAl2O3,
sCeO2, and sTiO2, respectively) were prepared by casting from a dispersion in N,N-dimethylformamide and
plasticized with a 1,3-dioxolane/1,2-dimethoxyethane mixture. The influence of the filler nature on ionic conductivity,
solvent uptake, activation energy, lithium ...
Added: July 30, 2026
S. A. Novikova, Karpov M. S., A. B. Yaroslavtsev, Russian Journal of Electrochemistry 2025 Vol. 61 No. 12 P. 817–843
The state-of-the-art in investigations in the field of cathode materials based on lithium–cobalt double phosphate for lithium-ion rechargeable batteries is surveyed. The specific features of the LiCoPO4 crystal structure, the transfer rate of charge carriers, the main synthetic methods of preparation, and the electrochemical characteristics of LiCoPO4-based cathodes such as discharge capacity, charge–discharge rate, and cyclability ...
Added: February 17, 2026
Voropaeva D., Trofimenko N. A., S. A. Novikova et al., Membranes and Membrane Technologies 2025 Vol. 7 No. 2 P. 112–124
Modern studies in the field of lithium metal batteries focus on the development of safe and stable electrolytes with high ionic conductivity and electrochemical stability. In this context, promising materials are gel polymer electrolytes based on perfluorosulfonic acid cation-exchange membranes modified with inorganic fillers and solvated with aprotic solvents. This study addresses Nafion® composite membranes ...
Added: February 17, 2026
Perfluorosulfonic acid polymer membrane with increased chemical stability for hydrogen-air fuel cell
Safronova E. Y., A. O. Bedarkova, Novikova S. et al., Polymer Degradation and Stability 2025 Vol. 240 Article 111477
One of the key tasks of hydrogen energy development is to obtain chemically stable proton exchange polymer membranes with high proton conductivity. This article presents the results on the investigation of the stabilization of proton-conducting membranes with a Nafion®-type structure using modification by fluorine. The membranes examined in this study exhibited high thermal stability and ...
Added: August 26, 2025
Voropaeva D., Novikova S., Stenina I. et al., Polymers 2023 Vol. 15 No. 22 Article 4340
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 ...
Added: January 25, 2024
Parshina A., Safronova E., Novikova S. et al., membranes 2023 Vol. 13 No. 8 Article 701
The development of accessible express methods to determine markers of viral diseases in saliva is currently an actual problem. Novel cross-sensitive sensors based on Donnan potential with bio-comparable perfluorosulfonic acid membranes for the determination of salivary viral markers (N-acetyl-L-methionine, L-carnitine, and L-lysine) were proposed. Membranes were formed by casting from dispersions of Nafion or Aquivion in N-methyl-2-pyrollidone or ...
Added: January 23, 2024
Ulyana M. Zavorotnaya, Ponomarev I., Volkova Y. et al., Membranes 2023 Vol. 13 No. 5 Article 485
This paper presents research on the technology development of the hydrogen-air fuel cells with high output power characteristics using fluorine-free co-polynaphtoyleneimide (co-PNIS) membranes. It is found that the optimal operating temperature of a fuel cell based on a co-PNIS membrane with the hydrophilic/hydrophobic blocks = 70/30 composition is in the range of 60-65 °C. The ...
Added: October 5, 2023
Irina Stenina, Polina Minakova, Tatiana Kulova et al., Batteries 2022 Vol. 8 No. 9 Article 111
The influence of different conductive additives (carbon nanofibers (CNFs), carbonnanoplatelets, and pyrolytic carbon from sucrose (Sucr) or polyvinylidene fluoride) on the morphology, electron conductivity, and electrochemical performance of LiFePO4-based cathodes wasinvestigated to develop the most efficient strategy for the fabrication of high-rate cathodes. Pyrolyticcarbon effectively prevents the growth of LiFePO4 grains and provides contact between ...
Added: January 26, 2023
Lebedev E., Gavrilin I., Kudryashova Y. et al., Batteries 2022 Vol. 8 No. 9 Article 109
Layers of germanium (Ge) microrods with a core–shell structure on titanium foils weregrown by a metal-assisted electrochemical reduction of germanium oxide in aqueous electrolytes.The structural properties and composition of the germanium microrods were studied by means ofscanning and transmission electron microscopy. Electrochemical studies of germanium nanowireswere carried out by impedance spectroscopy and cyclic voltammetry. The ...
Added: January 21, 2023
Tatiana L. Kulova, Skundin A., Gavrilin I. et al., Batteries 2022 Vol. 8 No. 8 Article 98
Nanostructure composites Ge-Co-P with brutto-composition CoGe2P0.1, or CoGe2@GePwere manufactured via electrolysis of aqueous electrolyte. Such composites are able to reversibleinsertion of lithium and sodium with specific capacities up to 855 and 425 mAh/g, respectively. Themain advantage of the composites consists in their excellent cycleability. ...
Added: January 21, 2023
Voropaeva D., Svetlana Novikova, Trofimenko N. et al., Processes 2022 Vol. 10 No. 12 Article 2509
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 ...
Added: November 28, 2022
Voropaeva D., Ekaterina Yu. Safronova, Svetlana A. Novikova et al., Mendeleev Communications 2022 Vol. 32 No. 3 P. 287–297
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 ...
Added: November 25, 2022
Yurova P., Малахова В. Р., Gerasimova E. V. et al., Polymers 2021 Vol. 13 No. 15 P. 2513
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 ...
Added: February 3, 2022
Сафронова Е., Pourcelly G., Yaroslavtsev A. B., Polymer Degradation and Stability 2020 Vol. 178 P. 109229
This work addresses the study of the effect of ultrasonic (US) treatment on the properties of alcohol solutions of perfluorinated sulfonic acid polymer Nafion® and cast membranes. The effect of the duration of US treatment on the physico-chemical properties (water uptake, transport and mechanical properties) of the resulted membranes is described for the first time. ...
Added: August 31, 2020
Golubenko D. V., Воропаева Д., Yaroslavtsev A. B., Materials Letters 2020 Vol. 277 P. 128247
Cation-exchange membranes based on polystyrene block-copolymer with phenylsulfonylimide ionogenic groups in the Na+-form show conductivities up to 0.2 mS cm−1 in organic amides such as N-methylpyrrolidone and N,N-dimemylacetamide. These values are 2-2.5 orders of magnitude higher compared to those of conventional sulfonated cation-exchange membranes. A strong dependence of solvation degree and ionic conductivity on dielectric ...
Added: August 30, 2020