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145 results on '"Hereijgers, Jonas"'

19. Crystalline Tin Disulfide by Low-Temperature Plasma-Enhanced Atomic Layer Deposition as an Electrode Material for Li-Ion Batteries and CO2 Electroreduction

Author

Mathew, Femi, primary, Van den Hoek, Järi, additional, Poonkottil, Nithin, additional, Zhao, Bo, additional, Rampelberg, Geert, additional, Choukroun, Daniel, additional, Hereijgers, Jonas, additional, Hens, Zeger, additional, Poelman, Dirk, additional, Breugelmans, Tom, additional, Detavernier, Christophe, additional, and Dendooven, Jolien, additional

Published
2023
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24. Improved Vanadium Flow Battery Performance through a Pulsating Electrolyte Flow Regime.

Author

De Wolf, Renée, Rossen, Alana, De Rop, Michiel, Arenas, Luis Fernando, Breugelmans, Tom, and Hereijgers, Jonas

Subjects
VANADIUM redox battery, FLOW batteries, MASS transfer, RENEWABLE energy sources, ENERGY storage, ELECTROLYTES
Abstract

The interest in flow batteries as energy storage devices is growing due to the rising share of intermittent renewable energy sources. In this work, the performance of a vanadium flow battery is improved, without altering the electrochemical cell, by applying a pulsating flow. This novel flow battery flow regime aims to enhance performance by improving its mass transfer properties. Both the pulse volume and frequency have an influence on the battery performance, and lead to a 38.7 % increase in accessible discharge capacity compared to the conventional steady flow regime at values of 0.40 cm3 and 2.4 Hz in this cell, respectively. Furthermore, at these parameter settings a reduction of the mass transfer resistance by 71.4 % is achieved at 0.2 cm3/min ⋅ cm2. These results show that a pulsating flow can be beneficial in certain conditions, opening new possibilities for boosting performance in flow batteries. [ABSTRACT FROM AUTHOR]

Published
2024
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31. Titanium-Based Static Mixer Electrodes to Improve the Current Density of Slurry Electrodes

Author

Percin, Korcan, Hereijgers, Jonas, Mulandi, Nicolas, Breugelmans, Tom, and Wessling, Matthias

Subjects
slurry electrode, electrochemistry, redox flow battery, static mixer, conducting materials
Abstract

Complex geometries for electrodes are a great challenge in electrochemical applications. Slurry electrodes have been one example, which use complex flow distributors to improve the charge transfer between the current collector and the slurry particles. Here we use titanium-based flow distributors produced by indirect 3D-printing to improve further the electron transfer from highly conductive flow distributors to the slurry particles for a vanadium redox flow application. The titanium static mixers are directly coated with graphite to increase the activity for vanadium redox reactions. Increasing layers of graphite have shown an optimum for the positive and negative electrolytes. The application of heat treatment on the electrodes improves the anodic and cathodic current peaks drastically. Testing the highly conductive static mixers in a self-made redox flow cell results in 110 mA cm−2 discharge polarization.

Published
2023
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36. Corrigendum to: A Versatile In-Situ Electron Paramagnetic Resonance Spectro-electrochemical Approach for Electrocatalyst Research (vol 7, pg 4578, 2020)

Author

Neukermans, Sander, Samanipour, Mohammad, Vincent Ching, H. Y., Hereijgers, Jonas, Van Doorslaer, Sabine, Hubin, Annick, Breugelmans, Tom, Faculty of Engineering, Earth System Sciences, Materials and Chemistry, and Electrochemical and Surface Engineering

Subjects
electrocatalyst screening, transparent conductive oxide electrode, detection of intermediates, Cyclic Voltammetry, EPR spectroscopy
Published
2022

43. Nickel-containing N-doped carbon as effective electrocatalysts for the reduction of CO₂ to CO in a continuous-flow electrolyzer

Author

Daems, Nick, De Mot, Bert, Choukroun, Daniel, Van Daele, Kevin, Li, Chen, Hubin, Annick, Bals, Sara, Hereijgers, Jonas, and Breugelmans, Tom

Subjects
Chemistry, Physics, Engineering sciences. Technology
Abstract

Nickel-containing N-doped carbons were synthesized for the electrochemical reduction of CO2 to CO, which is a promising approach to reduce the atmospheric CO2 levels and its negative impact on the environment. Unfortunately, poor performance (activity, selectivity and/or stability) is still a major hurdle for the economical implementation of this type of materials. The electrocatalysts were prepared through an easily up-scalable and easily tunable method based on the pyrolysis of Ni-containing N-doped carbons. Ni–N–AC–B1 synthesized with a high relative amount of nitrogen and nickel with respect to carbon, was identified as the most promising candidate for this reaction based on its partial CO current density (4.2 mA cm−2), its overpotential (0.57 V) and its faradaic efficiency to CO (>99%). This results in unprecedented values for the current density per g active sites (690 A g−1 active sites). Combined with its decent stability and its high performance in an actual electrolyzer setup, this makes it a promising candidate for the electrochemical reduction of CO2 to CO on a larger scale. Finally, the evaluation of this kind of material in a flow-cell setup has been limited and to the best of our knowledge never included an evaluation of several crucial parameters (e.g. electrolyte type, anode composition and membrane type) and is an essential investigation in the move towards up-scaling and ultimately industrial application of this technique. This study resulted in an optimal cell configuration, consisting of Pt as an anode, Fumatech® as the membrane and 1 M KHCO3 and 2 M KOH as catholyte and anolyte, respectively. In conclusion, this research offers a unique combination of electrocatalyst development and reactor optimization.

Published
2020

44. Direct Water Injection in Catholyte-Free Zero-Gap Carbon Dioxide Electrolyzers

Author

De Mot, Bert (author), Ramdin, M. (author), Hereijgers, Jonas (author), Vlugt, T.J.H. (author), Breugelmans, Tom (author), De Mot, Bert (author), Ramdin, M. (author), Hereijgers, Jonas (author), Vlugt, T.J.H. (author), and Breugelmans, Tom (author)

Abstract

A zero-gap flow electrolyzer with a tin-coated gas diffusion electrode as the cathode was used to convert humidified gaseous CO2 to formate. The influence of humidification, flow pattern and the type of membrane on the faradaic efficiency (FE), product concentration, and salt precipitation were investigated. We demonstrated that water management in the gas diffusion electrode was crucial to avoid flooding and (bi)carbonate precipitation, to uphold a high FE and formate concentration. Direct water injection was validated as a novel approach for water management. At 100 mA/cm2, direct water injection in combination with an interdigitated flow channel resulted in a FE of 80 % and a formate concentration of 65.4+/−0.3 g/l without salt precipitation for a prolonged CO2 electrolysis of 1 h. The use of bipolar membranes in the zero-gap configuration mainly produced hydrogen. These results are important for the design of commercial scale CO2 electrolyzers., Accepted Author Manuscript, Engineering Thermodynamics

Published
2020
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