| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mugele, Frieder
University of Twente
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2023Elastometry of Complex Fluid Pendant Capsulescitations
- 2022Formation and stability of heterogeneous organo-ionic surface layers on geological carbonatescitations
- 2020Electrochemically Induced Changes in TiO2 and Carbon Films Studied with QCM-Dcitations
- 2019A method for reversible control over nano-roughness of colloidal particlescitations
- 2017Mechanical History Dependence in Carbon Black Suspensions for Flow Batteriescitations
- 2017Influence of electrochemical cycling on the rheo-impedance of anolytes for Li-based Semi Solid Flow Batteriescitations
- 2014Charge Control And Wettability Alteration At Solid-liquid Interfacescitations
- 2007Volume phase transition of "smart" microgels in bulk solution and adsorbed at an interface: A combined AFM, dynamic light, and small angle neutron scattering studycitations
Places of action
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article
Influence of electrochemical cycling on the rheo-impedance of anolytes for Li-based Semi Solid Flow Batteries
Abstract
The recently launched concept of Semi-Solid Flow Batteries (SSFBs) shows a strong potential for flexible energy storage, but the liquid-dispersed state of the electrode materials introduces several aspects of which a scientific understanding is lacking. We studied the effect of electrochemical cycling on the rheological and electrical properties of a SSFB anolyte containing Li4Ti5O12 (LTO) and Ketjen Black (KB) particles in EC:DMC solvent with 1 M LiPF6, using an adapted rheometer that allows in situ electrochemical cycling and electrical impedance spectroscopy. Charging (lithiation) caused a reduction in the electronic conductivity, yield stress and high shear viscosity of the fluid electrode. For mildly reducing voltages (1.4 V), these changes were partially reversed on discharging. For more reducing voltages these changes were stronger and persistent. The finding of comparable trends for a fluid electrode without the LTO, lends support to a simplistic interpretation, in which all trends are ascribed to the formation of a surface layer around the conductive KB nanoparticles. This Solid Electrolyte Interphase (SEI) insulates particles and reduces the van der Waals attractions between them. SEI layers formed at less reducing voltages, partially dissolve during the subsequent discharge. Those formed at more reducing voltages, are thicker and permanent. As these layers increase the electronic resistance of the fluid electrode by (more than) an order of magnitude, our findings highlight significant challenges due to SEI formation that still need to be overcome to realize SSFBs.