Specific Capacitance Characteristics of Carbons, Activated by Potassium Hydroxide
Journal Title: Фізика і хімія твердого тіла - Year 2015, Vol 16, Issue 1
Abstract
This work is devoted to the study of the charge accumulation in the electric double layer on polarized electrode of the electrochemical systems. A series of samples of the nanoporous carbon material obtained from natural raw materials. In order to improve the its performance it has been made the modification of porous structure of the samples by thermal and chemical treatment. As an activator potassium hydroxide was used. Determination of the specific characteristics of ultracapacitors was conducted in two-electrode cell by potentiodynamic and galvanostatic methods. The pore formation process was studied by simultaneous thermoanalyzer STA 449 F3 Jupiter. It is shown that the resulting materials have high values of capacitance, which is realized by charge accumulation in the electric double layer, the pseudo capacitance contribution is absent. The optimal modes of carbonization and chemical activation were defined. The dependence of specific characteristics on the modification mode has explained. It is shown that almost all the samples are highly resistant in a wide range of current densities.
Authors and Affiliations
I. M. Budzulyak, B. I. Rachiy, V. M. Vashchynsky, M. V. Berkeschuk
Keywords
Related Articles
- EP ID EP310470
- DOI 10.15330/pcss.16.1.98-103
- Views 85
- Downloads 0
Polymorphic Transition of PbO, Initiated by Curing Conditions of Mesocomposites Under Action of Constant Physical Fields
Influence of physical-chemical factors at forming three-dimension network of thermosetting plastic in simulations action of constant physical field upon capable to polymorphic transition crystalline ((form of PbO first s...
Calculations of Segmented Modules Based on Bi2Te3 / PbTe Materials for Thermoelectric Generators
The results of segmented thermoelectric generator modules calculations by computer simulation methods are presented. Found that use of Bi2Te3-based materials as cold sections and PbTe-based materials as hot sections for...
Effect of Point Defect in Carbon Nanotube (8.0) on the Molecular Electrostatic Potential distribution Near it Edge
The influence of point defect on the electronic and spatial structure of carbon nanotubes (8.0) have been studied depending on the placement vacancies in the structure of nanotubes. On the basis of quantum-chemical calcu...
Quantum Size Effects in Thin Film Based on Lead Telluride
Based on the model of quantum flat rectangular and with infinitely high walls pit, the correspondences were calculated and received value of the Fermi energy and kinetic coefficients (conductivity σ, Seebeck coefficient...
Kinetics of Fragmentation During Annealing in Vacuum of Titanium Nanofilms Deposited Onto Non-Metallic Materials
The results are presented of the study of kinetics of fragmentation of titanium nanofilms 100 nm thick deposited onto the surface of samples made from single crystals of Al2O3(leucosapphire), ZrO2, SiC, and AlN ceramics...