Voltage dependence of supercapacitor capacitance

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F16%3APU119953" target="_blank" >RIV/00216305:26220/16:PU119953 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1515/mms-2016-0031" target="_blank" >http://dx.doi.org/10.1515/mms-2016-0031</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/mms-2016-0031" target="_blank" >10.1515/mms-2016-0031</a>

Result language

angličtina

Original language name

Voltage dependence of supercapacitor capacitance

Original language description

Electronic Double-Layer Capacitors (EDLC), called Supercapacitors (SC), are electronic devices that are capable to store a relatively high amount of energy in a small volume comparing to other types of capacitors. They are composed of an activated carbon layer and electrolyte solution. The charge is stored on electrodes, forming the Helmholtz layer, and in electrolyte. The capacitance of supercapacitor is voltage- dependent. We propose an experimental method, based on monitoring of charging and discharging a supercapacitor, which enables to evaluate the charge in an SC structure as well as the Capacitance-Voltage (C-V) dependence. The measurement setup, method and experimental results of charging/discharging commercially available supercapacitors in various voltage and current conditions are presented. The total charge stored in an SC structure is proportional to the square of voltage at SC electrodes while the charge on electrodes increases linearly with the voltage on SC electrodes. The Helmholtz capacitance increases linearly with the voltage bias while a sublinear increase of total capacitance was found. The voltage on SC increases after the discharge of electrodes due to diffusion of charges from the electrolyte to the electrodes. We have found that the recovery voltage value is linearly proportional to the initial bias voltage value.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20201 - Electrical and electronic engineering

Project

<a href="/en/project/LO1401" target="_blank" >LO1401: Interdisciplinary Research of Wireless Technologies</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

METROL MEAS SYST

ISSN

0860-8229

e-ISSN

2300-1941

Volume of the periodical

23

Issue of the periodical within the volume

3

Country of publishing house

PL - POLAND

Number of pages

9

Pages from-to

403-411

UT code for WoS article

000382041400008

EID of the result in the Scopus database

2-s2.0-84979294564