3D-printed porous electrodes for advanced electrochemical flow reactors: A Ni/stainless steel electrode and its mass transport characteristics |
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| Affiliation: | 1. Joint Center for Energy Storage Research, Albuquerque, NM 87185, United States;2. Power Sources Technology Group, Sandia National Laboratories, Albuquerque, NM 87185, United States;3. Laboratory for Surface Science and Technology and the Department of Physics and Astronomy, University of Maine, Orono, ME 04469, United States;1. Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208, USA;2. Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA;1. Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, Via Fossato di Mortara 17, 44121 Ferrara, Italy;2. Renewable Energy and Environmental R&D Center, ENI, Novara, Italy;1. CAS Key Laboratory of Soft Matter Chemistry, iCHEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Chemistry, School of Chemistry and Materials, University of Science and Technology of China, Hefei 230026, Anhui, China;2. Dalian National Laboratory for Clean Energy, Dalian 116023, Liaoning, China |
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| Abstract: | Porous electrodes have shown high performance in industrial electrochemical processes and redox flow batteries for energy storage. These materials offer great advantages over planar electrodes in terms of larger surface area, superior space time yield and enhanced mass transport. In this work, a highly ordered porous stainless steel structure was manufactured by 3D-printing and coated with nickel from an acidic bath by electrodeposition in a divided rectangular channel flow cell. Following the electrodeposition, the volumetric mass transport coefficient of this electrode was determined by the electrochemical reduction of 1.0×10−3 mol dm−3 of ferricyanide ions by linear sweep voltammetry and chronoamperometry. The convection diffusion characteristics are compared with other geometries to demonstrate the novelty and the advantages of 3D-printed porous electrodes in electrochemical flow reactors. Robust porous electrodes with tailored surface area, composition, volumetric porosity and flow properties are possible. |
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