Investigating the interactions between Carbopol® and zinc particles within the context of a zinc-air redox flow batteries application

This research investigates the interactions between Carbopol® and zinc microparticles and their role in the stabilization of zinc within the framework of zinc slurry–air redox flow batteries (Zn-air RFBs). The study explores the potential of yield stress fluids, particularly PAA (Carbopol®) microgel...

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Bibliographic Details
Published in:Rheologica acta 2024-08, Vol.63 (8), p.645-656
Main Authors: Milian, Diego, Rharbi, Yahya, Kissi, Nadia El
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Complex Fluids and Microfluidics
Fluid flow
Food Science
Materials Science
Mechanical Engineering
Microgels
Microparticles
Original Contribution
Physical chemistry
Polymer Sciences
Rechargeable batteries
Slurries
Soft and Granular Matter
Stabilization
Surface chemistry
Yield strength
Yield stress
Zinc
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Summary:This research investigates the interactions between Carbopol® and zinc microparticles and their role in the stabilization of zinc within the framework of zinc slurry–air redox flow batteries (Zn-air RFBs). The study explores the potential of yield stress fluids, particularly PAA (Carbopol®) microgels, as stabilizers for zinc particles during battery operation, and regarding sedimentation in particular. Two effects that can limit the effectiveness of PAA yield stress in stabilizing the suspension are examined in this study. First is the ionic strength and pH that can evolve during the slurry formulation. The second effect is associated to zinc polymer interactions that can develop during the suspension preparation. Using methodologies based on rheometry and UV–Vis spectroscopy, the research identifies that the primary stabilization challenge is the adsorption of Carbopol ® microgels onto zinc surfaces, which significantly influences the gel’s yield stress. These insights contribute to an enhanced understanding of the physical chemistry of the suspending fluid, facilitating the development of more efficient and stable Zn-Air RFBs.
ISSN:0035-4511
1435-1528
DOI:10.1007/s00397-024-01464-w