| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Czajka, R.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2016XPS valence band studies of nanocrystalline Zr[sbnd]Pd alloy thin filmscitations
- 2015Chemical etching of stainless steel 301 for improving performance of electrochemical capacitors in aqueous electrolytecitations
- 2015Ba termination of Ge(001) studied with STM
- 2015Initial growth of Ba on Ge(001): An STM and DFT study
- 2008STM study of titanium silicide nanostructure growth on Si(1 1 1)-(sqrt(19) × sqrt(19)) substratecitations
Places of action
| Organizations | Location | People |
|---|
article
Chemical etching of stainless steel 301 for improving performance of electrochemical capacitors in aqueous electrolyte
Abstract
<p>The main purpose of the study was to increase the surface roughness of stainless steel 301 current collectors by etching, in order to improve the electrochemical performance of electrical double-layer capacitors (EDLC) in 1 mol L<sup>-1</sup>lithium sulphate electrolyte. Etching was realized in 1:3:30 (HNO<sub>3</sub>:HCl:H<sub>2</sub>O) solution with times varying up to 10 min. For the considered 15 μm thick foil and a mass loss around 0.4 wt.%, pitting was uniform, with diameter of pits ranging from 100 to 300 nm. Atomic force microscopy (AFM) showed an increase of average surface roughness (Ra) from 5 nm for the as-received stainless steel foil to 24 nm for the pitted material. Electrochemical impedance spectroscopy realized on EDLCs with coated electrodes either on as-received or pitted foil in 1 mol L<sup>-1</sup>Li<sub>2</sub>SO<sub>4</sub>gave equivalent distributed resistance (EDR) of 8 Ω and 2 Ω, respectively, demonstrating a substantial improvement of collector/electrode interface after pitting. Correlatively, the EDLCs with pitted collector displayed a better charge propagation and low ohmic losses even at relatively high current of 20 A g<sup>-1</sup>. Hence, chemical pitting of stainless steel current collectors is an appropriate method for optimising the performance of EDLCs in neutral aqueous electrolyte.</p>