Malozyomov Boris V, Kukartsev Vladislav V, Martyushev Nikita V, Kondratiev Viktor V, Klyuev Roman V, Karlina Antonina I
Department of Electrotechnical Complexes, Novosibirsk State Technical University, 630073 Novosibirsk, Russia.
Department of Informatics, Institute of Space and Information Technologies, Siberian Federal University, 660041 Krasnoyarsk, Russia.
Micromachines (Basel). 2023 Jun 23;14(7):1288. doi: 10.3390/mi14071288.
Carbon materials are promising for use as electrodes for supercapacitors and lithium-ion batteries due to a number of properties, such as non-toxicity, high specific surface area, good electronic conductivity, chemical inertness, and a wide operating temperature range. Carbon-based electrodes, with their characteristic high specific power and good cyclic stability, can be used for a new generation of consumer electronics, biomedical devices and hybrid electric vehicles. However, most carbon materials, due to their low electrical conductivity and insufficient diffusion of electrolyte ions in complex micropores, have energy density limitations in these devices due to insufficient number of pores for electrolyte diffusion. This work focuses on the optimization of a hybrid material based on porous carbon and carbon nanotubes by mechanical mixing. The purpose of this work is to gain new knowledge about the effect of hybrid material composition on its specific capacitance. The material for the study is taken on the basis of porous carbon and carbon nanotubes. Electrodes made of this hybrid material were taken as an object of research. Porous carbon or nitrogen-containing porous carbon (combined with single-, double-, or multi-layer carbon nanotubes (single-layer carbon nanotubes, bilayer carbon nanotubes or multilayer carbon nanotubes) were used to create the hybrid material. The effect of catalytic chemical vapor deposition synthesis parameters, such as flow rate and methane-to-hydrogen ratio, as well as the type of catalytic system on the multilayer carbon nanotubes structure was investigated. Two types of catalysts based on MoO (μ-OH){Co(HO)} were prepared for the synthesis of multilayer carbon nanotubes by precipitation and combustion. The resulting carbon materials were tested as electrodes for supercapacitors and lithium ion intercalation. Electrodes based on nitrogen-containing porous carbon/carbon nanotubes 95:5% were found to be the most efficient compared to nitrogen-doped porous carbon by 10%. Carbon nanotubes, bilayer carbon nanotubes and multilayer carbon nanotubes synthesized using the catalyst obtained by deposition were selected as additives for the hybrid material. The hybrid materials were obtained by mechanical mixing and dispersion in an aqueous solution followed by lyophilization to remove water. When optimizing the ratio of the hybrid material components, the most effective porous carbon:carbon nanotubes component ratio was determined.
由于具有许多特性，如无毒、高比表面积、良好的电子导电性、化学惰性以及较宽的工作温度范围，碳材料有望用作超级电容器和锂离子电池的电极。具有高比功率和良好循环稳定性这一特性的碳基电极可用于新一代消费电子产品、生物医学设备和混合动力电动汽车。然而，大多数碳材料由于其低电导率以及电解质离子在复杂微孔中扩散不足，在这些设备中存在能量密度限制，原因是用于电解质扩散的孔隙数量不足。这项工作专注于通过机械混合来优化基于多孔碳和碳纳米管的混合材料。这项工作的目的是获取关于混合材料组成对其比电容影响的新知识。研究材料基于多孔碳和碳纳米管选取。由这种混合材料制成的电极被作为研究对象。使用多孔碳或含氮多孔碳（与单层、双层或多层碳纳米管（单层碳纳米管、双层碳纳米管或多层碳纳米管）结合）来制备混合材料。研究了催化化学气相沉积合成参数，如流速和甲烷与氢气的比例，以及催化体系类型对多层碳纳米管结构的影响。通过沉淀和燃烧制备了两种基于MoO(μ-OH){Co(HO)}的催化剂用于多层碳纳米管的合成。将所得碳材料作为超级电容器和锂离子嵌入电极进行测试。发现基于95:5%含氮多孔碳/碳纳米管的电极比掺氮多孔碳效率高10%，最为有效。使用通过沉积获得的催化剂合成的碳纳米管、双层碳纳米管和多层碳纳米管被选作混合材料的添加剂。通过在水溶液中机械混合和分散，随后冻干以除去水分来获得混合材料。在优化混合材料组分比例时，确定了最有效的多孔碳与碳纳米管的组分比例。
