ISSN 1608-4039 (Print)
ISSN 1680-9505 (Online)

углеродная добавка

Electrode composites based on lithium-vanadium(III) phosphate and pyrolysis product of carbon black and starch

In this paper, we compare electrode composites based on Li3V2(PO4)3 and carbon according to their initial characteristics in the galvanostatic cycling mode and structural features. The composites were synthesized using carbon black or starch as carbon sources. The electrode material obtained using starch demonstrates a higher specific capacity, the stability of which is lower during cycling, while characterized by a smaller unit cell volume and a larger crystallite size.

Электродные композиты на основе фосфата ванадия(III)-лития и продукта пиролиза сажи и крахмала

В работе сравниваем электродные композиты на основе Li3V2(PO4)3 и пиролитического углерода, синтезированные с использованием сажи или крахмала в качестве углеродных источников, по начальных характеристикам в режиме гальваностатического циклирования и по структурным особенностям. Электродный материал, полученный с применением крахмала, демонстрирует более высокую удельную ёмкость, но её меньшую стабильность при циклировании, при этом характеризуется меньшим объёмом элементарной ячейки и бо́льшим размером кристаллитов.

Influence of additives of carbon nanotubes and graphene to the active mass of the negative electrode of the lead-acid battery on its electrochemical characteristics

The electrochemical characteristics of the negative electrodes of the lead-acid battery with additives of carbon nanotubes and graphene were studied. It was shown that the highest values of the capacitive characteristics of the electrodes were obtained by adding carbon nanotubes to the negative active mass. The processes occurring on the negative electrode were studied by the method of impedance spectroscopy. Applying simulation, an equivalent electrical circuit was obtained, which adequately approximated the obtained frequency dependences.

Structural and Electrochemical Characteristics of Porous Lead Electrodes with Additive Nanostructured Carbon

The effect of carbon materials of two types was studied: multi-walled carbon nanotubes (“Art-nano” of the NSU “S” brand (TU BU 690654933.001.-2011)) and multilayer graphene (“Art-nano GT” (TU BU 691460594.004–2017), and modifications by treatment with ozone and dimethylformamide (manufacturer LLC Advanced Research and Technology, Belarus) on the structural characteristics, capacity and utilization of the active mass of the negative electrode of a lead-acid battery.