The effect of thermoexfoliated graphite particles dispersion on electrical conduction of compositions with nanoporous carbon
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REVO, Serghei, RACHIY, B., OLESHCHUK, A., ZHANMIN, Dong, IVANENKO, K., NEDILKO, S.. The effect of thermoexfoliated graphite particles dispersion on electrical conduction of compositions with nanoporous carbon. In: Materials Science and Condensed Matter Physics, Ed. 7, 16-19 septembrie 2014, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2014, Editia 7, p. 234.
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Materials Science and Condensed Matter Physics
Editia 7, 2014
Conferința "Materials Science and Condensed Matter Physics"
7, Chișinău, Moldova, 16-19 septembrie 2014

The effect of thermoexfoliated graphite particles dispersion on electrical conduction of compositions with nanoporous carbon


Pag. 234-234

Revo Serghei1, Rachiy B.2, Oleshchuk A.1, Zhanmin Dong3, Ivanenko K.1, Nedilko S.1
 
1 Taras Shevchenko National University of Kyiv,
2 Vasyl Stefanyk Precarpathian National University,
3 Tsinghua University, Beijing
 
Disponibil în IBN: 11 martie 2019


Rezumat

Nanocomposite materials (NCM), whose components include nanoporous carbon (NPC) with a high specific surface area (of the order of 1,500 m2/g) and various fillers with a higher than NPC's electrical conduction, are promising from the standpoint of their practical application. This allows making, for example, high capacity supercapacitors (SC) from such materials. Thus, in particular, NCM made from a mixture of NPC (the paiiicles' cross-section is 200 µm) and the1moexfoliated graphine (TEG) used as SC's active electrode allows creating SC with a higher capacity than in counte1paiis. Utilization of TEG, which is cheaper, chemically ine1i, has a relatively high specific conductivity (cr~105 n-1 -m-1) and is easy to press without binders, in place of conventional metal filling materials [1] opens up prospects for creation of a CM with high perfo1mance. In this work we have used NPC made from phytogenous raw material. The procedure of its production is described in work [2]. The NPC material was mixed with TEG to increase its electrical conduction. The point of research here was to find out the degree to which dispersion of TEG pa1iicles, whose cross-section ( f TEa) was varied over 60 to 316 µm, will affect the electrical conduction of NCM. The optimlllll relationship between concentrations of the above-mentioned powders was chosen at 85:15, i. e. the same as for high characteristics [3]. The below table presents the study results of electrical conduction in relation to NPC-TEG CM's density ( d) and disperson of TEG paiiicles for two degrees of compaction (P). We have established that electrical conduction of NCM, whose TEG's nonequilibnun pai-ticles size is greater than the sizes of NPC pa.iii cl es, decreases shaiply with the increase of compaction dregree. In samples, whose TEG particles' sizes was compai·able with NPC paiiicles' sizes and their mo1phology approximating equiexed values, their electrical conduction increased with the increase of the compaction degree.