Vol 25, No 3 (2025)
Articles
Hydrolytic and oxidative stability of precursors for the synthesis of sulfide solid electrolytes
Abstract
The oxidative and hydrolytic stability of the precursors Li2S and P2S5 for the synthesis of sulfide solid electrolytes was studied using gravimetric analysis. The study was conducted in air with different water content and dry argon. It was established that the water content in air significantly affects the stability of materials. Li2S and P2S5 are unstable even in air with the water content of 5 ppm. Moreover, it was found that the oxidative-hydrolytic stability of Li2S depends on the presence of impurities.
Electrochemical Energetics. 2025;25(3):115-123
115-123
Study of the influence of electrolyte on the properties of lithium iron phosphate batteries with carbon-modified electrodes
Abstract
It was studied that the quality of the electrolyte of lithium-iron-phosphate batteries has a significant effect on their service life and operational characteristics. It was shown that TS-EDM01 and DGZh018 electrolytes can be used in the production of lithium iron phosphate batteries. It was found that the use of carbon in modifying the surface of LiFePO4 and electrode manufacturing increases the stability, service life and specific characteristics of batteries.
Electrochemical Energetics. 2025;25(3):124-135
124-135
Lithiation of electrodeposited silicon films
Abstract
Lithium-ion batteries with improved performance are increasingly in demand in various fields. Silicon-based materials are one of the most actively studied materials, because they allow increasing the discharge capacity of the anode. In this work, we continue studying the behavior of the thin-film silicon anodes inside the anode half-cell of a lithium-ion battery in the conditions of limited charge capacity to 1000 and 4000 mA·h/g. Samples of silicon films, electrodeposited from the molten KI-KF-KCl-K2SiF6 electrolyte with the temperature of 700°C on glassy carbon in the potentiostatic mode, were used as the objects of the research. It was noted that limiting the charge capacity makes it possible to increase the number of cycles maintaining a relatively high discharge capacity and to increase the operational life of the electrodeposited silicon films. Applying the C/10 cycling current and limiting the charge capacity to 4000 mA·h/g, the discharge capacity of the samples was 3850–3930 mA·h/g, and using the 2C cycling current it was up to 3000 mA·h/g.
Electrochemical Energetics. 2025;25(3):136-147
136-147
Catalysts for oxygen electroreduction in alkaline medium based on carbon nanotubes modified with urea and phthalocyanines of iron, cobalt and palladium
Abstract
Catalysts for oxygen reduction in the alkaline electrolyte based on multi-walled carbon nanotubes modified with urea and phthalocyanines of iron, cobalt and palladium were synthesized and studied. Physicochemical studies of the surface of the synthesized materials were carried out using porosimetry, Raman spectroscopy, X-ray phase analysis and X-ray photoelectron spectroscopy. The catalyst doped with metal phthalocyanines (MWCNT(Urea)_CoPc_FePc_Pd) has the largest surface area. It can be assumed that the high specific surface area of this catalyst is obtained due to the formation of new layers of hierarchical carbon on the surface of the nanotubes during high-temperature pyrolysis. It was established that metal phthalocyanines are nitrogen dopants in the structure of carbon nanotubes. The electrocatalytic properties of the synthesized catalysts in the oxygen reduction reaction were studied using the voltammetric method.
Electrochemical Energetics. 2025;25(3):148-160
148-160
VII International Scientific and Practical Conference "Theory and Practice of Modern Electrochemical Production"
Abstract
В 2025 г. кафедра технологии электрохимических производств отмечает юбилей – 105 лет со дня создания П. П. Федотьевым в 1920 г. первой в России и мире кафедры технологии электрохимических производств на базе Санкт-Петербургского технологического института. За годы существования кафедры выпущено большое количество инженеров-электрохимиков, бакалавров и магистров, кандидатов наук, 26 выпускников кафедры стали докторами наук. В настоящее время кафедра готовит бакалавров (направленность «Технология электрохимических производств») и магистров (направленность «Современные электрохимические производства») по направлению «Химическая технология».
Electrochemical Energetics. 2025;25(3):161-162
161-162