Details
| Original language | English |
|---|---|
| Pages (from-to) | 3688-3694 |
| Number of pages | 7 |
| Journal | ChemElectroChem |
| Volume | 5 |
| Issue number | 23 |
| Early online date | 24 Sept 2018 |
| Publication status | Published - 3 Dec 2018 |
Abstract
A focused femtosecond laser beam was scanned across a nickel electrode in a line pattern with different line distances to generate a large electrochemical surface area for charge storage. During the laser structuring process, small metal particles were generated and sintered to a porous foam-like structure, the so-called laser-induced nano-foam (LINF), which strongly adheres to the substrate surface. The structuring was carried out in argon atmosphere, in order to prevent oxidation of the LINF structure during the structuring process. The topography of the LINF was investigated by scanning electron microscopy and laser scanning microscopy. The electrochemical surface area of the electrodes was determined by cyclic voltammetry based on the charging of the double-layer. The total capacity of the nickel LINF electrodes was measured by galvanostatic charge-discharge to test their capability for supercapacitor applications. The surface area enlargement and therefore the total capacity increases with decreasing line distance. The LINF structure provides a surface area enlargement up to a factor of 1600 and a total capacity up to 2 C cm−2.
Keywords
- laser structuring, materials science, nickel foam, nickel oxide electrode, ultracapacitor
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- Electrochemistry
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In: ChemElectroChem, Vol. 5, No. 23, 03.12.2018, p. 3688-3694.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Porous Nickel Nano-Foam by Femtosecond Laser Structuring for Supercapacitor Application
AU - Lange, Karsten
AU - Hördemann, Christian
AU - Schulz-Ruhtenberg, Malte
AU - Caro, Jürgen
N1 - © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/12/3
Y1 - 2018/12/3
N2 - A focused femtosecond laser beam was scanned across a nickel electrode in a line pattern with different line distances to generate a large electrochemical surface area for charge storage. During the laser structuring process, small metal particles were generated and sintered to a porous foam-like structure, the so-called laser-induced nano-foam (LINF), which strongly adheres to the substrate surface. The structuring was carried out in argon atmosphere, in order to prevent oxidation of the LINF structure during the structuring process. The topography of the LINF was investigated by scanning electron microscopy and laser scanning microscopy. The electrochemical surface area of the electrodes was determined by cyclic voltammetry based on the charging of the double-layer. The total capacity of the nickel LINF electrodes was measured by galvanostatic charge-discharge to test their capability for supercapacitor applications. The surface area enlargement and therefore the total capacity increases with decreasing line distance. The LINF structure provides a surface area enlargement up to a factor of 1600 and a total capacity up to 2 C cm−2.
AB - A focused femtosecond laser beam was scanned across a nickel electrode in a line pattern with different line distances to generate a large electrochemical surface area for charge storage. During the laser structuring process, small metal particles were generated and sintered to a porous foam-like structure, the so-called laser-induced nano-foam (LINF), which strongly adheres to the substrate surface. The structuring was carried out in argon atmosphere, in order to prevent oxidation of the LINF structure during the structuring process. The topography of the LINF was investigated by scanning electron microscopy and laser scanning microscopy. The electrochemical surface area of the electrodes was determined by cyclic voltammetry based on the charging of the double-layer. The total capacity of the nickel LINF electrodes was measured by galvanostatic charge-discharge to test their capability for supercapacitor applications. The surface area enlargement and therefore the total capacity increases with decreasing line distance. The LINF structure provides a surface area enlargement up to a factor of 1600 and a total capacity up to 2 C cm−2.
KW - laser structuring
KW - materials science
KW - nickel foam
KW - nickel oxide electrode
KW - ultracapacitor
UR - http://www.scopus.com/inward/record.url?scp=85055056506&partnerID=8YFLogxK
U2 - 10.1002/celc.201801152
DO - 10.1002/celc.201801152
M3 - Article
AN - SCOPUS:85055056506
VL - 5
SP - 3688
EP - 3694
JO - ChemElectroChem
JF - ChemElectroChem
SN - 2196-0216
IS - 23
ER -