Back to Search
Start Over
Multi-rail transmission-line model as an equivalent circuit for electrochemical impedance of a porous electrode
- Source :
- Journal of Electroanalytical Chemistry. 878:114622
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- A new type of transmission-line model (TLM) as an equivalent circuit for the electrochemical impedance is developed to describe a porous electrode impregnated with an electrolyte solution. Two kinds of TLMs, i.e., one for diffusion-migration and the other for a porous electrode, are combined. To describe the double-layer capacitance strictly, the interfacial impedance is explicitly divided into the faradaic impedance and double-layer capacitance, and the latter is distributed into contributions of each ionic species. The obtained model describes diffusion, migration, and concentration changes of all ionic species within a porous electrode. In combination with a TLM for a bulk electrolyte solution, an equivalent circuit for a whole cell is also made. This should be a powerful tool for analyzing the impedances of devices with porous electrodes, such as batteries and electric double-layer capacitors, especially in the low-frequency region.
- Subjects :
- business.industry
Chemistry
General Chemical Engineering
Faradaic impedance
02 engineering and technology
Electrolyte
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
Capacitance
0104 chemical sciences
Analytical Chemistry
law.invention
Capacitor
Transmission line
law
Optoelectronics
Equivalent circuit
0210 nano-technology
business
Electrical impedance
Subjects
Details
- ISSN :
- 15726657
- Volume :
- 878
- Database :
- OpenAIRE
- Journal :
- Journal of Electroanalytical Chemistry
- Accession number :
- edsair.doi...........0ab6f3167b7ff6bf3f03870d27fa9fd6