Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   JANUARY 2017 , Volume 16 , Number 10 ; Page(s) 384 To 392.
 
Paper: 

EFFECT OF ELECTRODE THICKNESS AND POROSITY ON THE PERFORMANCE OF DOUBLE-LAYER SUPERCAPACITOR

 
 
Author(s):  GHORBANI KASHKOOLI ALI, AKBARI GHASEM*
 
* MECHANICAL ENGINEERING DEPARTMENT, QAZVIN BRANCH ISLAMIC AZAD UNIVERSITY, QAZVIN, IRAN
 
Abstract: 

Electrochemical supercapacitors store energy in the electric field formed at the interface of electrode/electrolyte in the electrochemical double layer. Compared to conventional capacitors, using high surface area electrodes results in the extremely large capacitance in supercapacitors. A mathematical model has been developed to investigate the effect of electrode thickness and porosity on the performance of double-layer supercapacitor. The model is based on the conservation of species and charge governing equations. This model drops the common simplifying assumptions of concentrations uniformity and capacitance independence of voltage in supercapacitors models. The model can predict the experimental data of cell voltage with high accuracy and is used to examine the effect of utilizing different electrode thicknesses and porosities on the performance. In the design and operation condition of supercapacitor considered here, specific capacitance increases as electrode thickness increases for electrode thicknesses from 70 to 90 micrometer and decreases as electrode thickness exceeds 90 micrometer. Employing more porous electrodes enhances specific capacitance. The amount of increment is such that if the electrode porosity is doubled, specific capacitance increases byapproximately 5%.

 
Keyword(s): DOUBLE-LAYER SUPERCAPACITOR MODELING, SPECIFIC CAPACITANCE, SPECIFIC ENERGY, SPECIFIC POWER, POROSITY
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 66
 
Latest on Blog
Enter SID Blog