Study on the Carbon Black Stability During Cycling in Galvanostatic Mode

Nowadays interest in supercapacitors as energy storage devices for microelectronics is growing. The development of energy storage systems is related to the development of technologies for producing new materials, in particular the new porous carbon materials. The attraction of these materials is due to the unique combination of chemical and physical properties of carbon, namely: high electrical conductivity; developed specific surface area; corrosion resistance; thermal stability; controlled porous structure; operational decisions and a possibility of use as a part of composite materials; high purity; relatively low cost of the final product.

In this work, we have obtained an experimental sample of superconducting carbon black with the necessary physical and chemical properties by thermal-gas-chemical processing of carbon black. One of the most common activated carbons used in the supercapacitors production – Norit DLC Supra 30 was chosen as the object for comparison.

The paper presents the results of experimental studies of the porous structure parameters as well as the electrochemical properties of the experimental superconducting highly porous carbon black during cycling in the galvanostatic mode in a solution of sulfuric acid (3.55 M H2SO4). Moreover, it provides a comparative assessment of the porous structure parameters and distribution of the pores according to the size of the research objects – VPU TK-7 and Norit DLC Supra 30. We have found that the experimental sample of the highly porous superconducting carbon black VPU TK-7 has higher stability and specific capacity indicators compared with the existing commercial Norit DLC Supra 30 carbon material sample which has a narrower pore size distribution. Apparently, this might be related to its chemical purity and synthesis conditions, due to which the optimal structural and textural properties are formed. Further studies will determine the conditions for the targeted synthesis of special domestic carbon materials for various electrochemical systems.

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