Limper, Alexander ; Weber, Nils ; Brodersen, Anselm ; Keller, Robert ; Wessling, Matthias ; Linkhorst, John (2022)
Additive manufacturing of composite porosity mixer electrodes.
In: Electrochemistry Communications, 134
doi: 10.1016/j.elecom.2021.107176
Article, Bibliographie
Abstract
Electrochemical reactors present a viable means to unleash the full potential of renewable energies. With maximized surface areas, and thus increased reaction rates, the elimination of diffusion boundary layers on the electrode surface becomes increasingly important, calling for 3D structured electrodes that provide mass transport control inside the reactor. We produce 3D structured stainless steel mixer electrodes with high surface areas from selective laser sintering. By global control of the laser power, electrodes are rendered intrinsically porous without the need to define micro-features. The result is a composite porosity electrode (CPE) with a highly porous skin, a rigid porous support and a dense current collector core. The CPE shows increasing reaction rate of the porous surface with intensifying passive mixing at rising Reynolds numbers. This is explained by a large electrochemical surface area of the porous electrode that is made accessible through the mixer electrode's mass transport enhancement. With its excellent scalability, this method promises great potential for the process intensification of a wide range of electrochemical applications.
| Item Type: | Article |
|---|---|
| Erschienen: | 2022 |
| Creators: | Limper, Alexander ; Weber, Nils ; Brodersen, Anselm ; Keller, Robert ; Wessling, Matthias ; Linkhorst, John |
| Type of entry: | Bibliographie |
| Title: | Additive manufacturing of composite porosity mixer electrodes |
| Language: | English |
| Date: | 2022 |
| Publisher: | Elsevier |
| Journal or Publication Title: | Electrochemistry Communications |
| Volume of the journal: | 134 |
| DOI: | 10.1016/j.elecom.2021.107176 |
| Abstract: | Electrochemical reactors present a viable means to unleash the full potential of renewable energies. With maximized surface areas, and thus increased reaction rates, the elimination of diffusion boundary layers on the electrode surface becomes increasingly important, calling for 3D structured electrodes that provide mass transport control inside the reactor. We produce 3D structured stainless steel mixer electrodes with high surface areas from selective laser sintering. By global control of the laser power, electrodes are rendered intrinsically porous without the need to define micro-features. The result is a composite porosity electrode (CPE) with a highly porous skin, a rigid porous support and a dense current collector core. The CPE shows increasing reaction rate of the porous surface with intensifying passive mixing at rising Reynolds numbers. This is explained by a large electrochemical surface area of the porous electrode that is made accessible through the mixer electrode's mass transport enhancement. With its excellent scalability, this method promises great potential for the process intensification of a wide range of electrochemical applications. |
| Uncontrolled Keywords: | 3D mixer electrode, Additive manufacturing, Composite porosity, Electrosynthesis, Selective laser sintering, Tubular reactor |
| Divisions: | 16 Department of Mechanical Engineering 16 Department of Mechanical Engineering > Chair for Process Engineering of Electrochemical Systems |
| Date Deposited: | 13 Sep 2023 11:13 |
| Last Modified: | 24 Jul 2024 08:25 |
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