Promising aqueous dispersions of carbon black for semisolid flow battery application

Meslam, Mentallah; Elzatahry, Ahmed A.; Youssry, Mohamed

doi:10.1016/j.colsurfa.2022.129376

Cited by 11 publications

(3 citation statements)

References 113 publications

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“…Applications include pigments for ink, , reinforcing fillers in tires and other rubber products, , electrically conductive admixture in cement, conductive materials for supercapacitors, biosensors, − and electrodes for semisolid flow batteries. − Being much cheaper than carbon nanotubes or graphene, CB particles appear promising for applications in energy storage, including flow electrodes for which the ultimate goal is to maximize the conductivity, while minimizing the shear viscosity of the material. In that framework, flow batteries based on aqueous dispersion of carbon black nanoparticles have recently received an upsurge of interest. ,− …”

Section: Introductionmentioning

confidence: 99%

Dual Origin of Viscoelasticity in Polymer-Carbon Black Hydrogels: A Rheometry and Electrical Spectroscopy Study

Legrand

Manneville

McKinley³

et al. 2023

Macromolecules

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Nanocomposite gels formed by mixing nanoparticles and polymers offer a limitless creative space for the design of functional advanced materials with a broad range of applications in materials and biological sciences. Here, we focus on aqueous dispersions of hydrophobic colloidal soot particles, namely, carbon black (CB) dispersed with a sodium salt of carboxymethylcellulose (CMC), a food additive known as cellulose gum that bears hydrophobic groups, which are liable to bind physically to CB particles. Varying the relative content of CB particles and cellulose gum allows us to explore a rich phase diagram that includes a gel phase observed for a large enough CB content. We investigate this hydrogel using rheometry and electrochemical impedance spectroscopy. CB−CMC hydrogels display two radically different types of mechanical behaviors that are separated by a critical CMC-to-CB mass ratio r c . For r < r c , i.e., for low CMC concentration, the gel is electrically conductive and shows a glassy-like viscoelastic spectrum, pointing to a microstructure composed of a percolated network of CB particles decorated by CMC. In contrast, gels with a CMC concentration larger than r c are nonconductive, indicating that the CB particles are dispersed in the cellulose gum matrix as isolated clusters, and act as physical cross-linkers of the CMC network, hence providing mechanical rigidity but limited conductivity enhancement to the composite. Moreover, in the r > r c concentration range, CB−CMC gels display a power-law viscoelastic spectrum that depends strongly on the CMC concentration. These relaxation spectra can be rescaled onto a master curve, which exhibits a power-law scaling in the high-frequency limit, with an exponent that follows Zimm theory, showing that CMC plays a key role in the gel viscoelastic properties for r > r c . Our results offer an extensive experimental characterization of CB−CMC dispersions that will be useful for designing soft nanocomposite gels based on hydrophobic interactions.

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Section: Introductionmentioning

confidence: 99%

Dual Origin of Viscoelasticity in Polymer-Carbon Black Hydrogels: A Rheometry and Electrical Spectroscopy Study

Legrand

Manneville

McKinley³

et al. 2023

Macromolecules

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“…For instance, mineral mining may be carried out in underdeveloped nations with subpar social and environmental regulations (such as zinc mining in China) or the electrolytes used may pose serious risks. [44,45] The control mechanisms and continuously running pumps that move electrolytes between the electrochemical cell and storage tanks further reduce the overall efficiency of flow batteries. The overall efficiency may also be affected by the active temperature control required by VRFBs.…”

Section: Hicham Meskher Completed His Ms Inmentioning

confidence: 99%

“…The prevalent flow battery systems (VRFB, iron‐chromium, and zinc‐bromine) exhibit plainly expressed concerns regarding the environmental or social impact during the manufacture of primary materials, damage, or disposal. For instance, mineral mining may be carried out in underdeveloped nations with subpar social and environmental regulations (such as zinc mining in China) or the electrolytes used may pose serious risks [44,45] . The control mechanisms and continuously running pumps that move electrolytes between the electrochemical cell and storage tanks further reduce the overall efficiency of flow batteries.…”

Section: Introductionmentioning

confidence: 99%

Lithium‐Free Redox Flow Batteries: Challenges and Future Prospective for Safe and Efficient Energy Storage

Kanti Hazra,

Kim,

Meskher

et al. 2024

Batteries & Supercaps

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Considering the costs, waste, and impact on the environment of current energy consumption, accurate, cost‐effective, and safely deployed energy storage systems are required. Lithium‐free redox flow batteries (RFBs) are a feasible solution. RFBs can store enormous amounts of energy effectively and are increasingly used for large‐scale applications. The use of RFBs has significantly enhanced the performance of energy storage systems and effectively reduced the costs and wastage of energy storage operations. Vanadium‐based RFBs are an emerging energy‐storage technology being explored for large‐scale deployment owing to their numerous benefits, including zero cross‐contamination, scalability, flexibility, extended life cycle, and nontoxic working state. This study describes the fundamental operating principles of redox flow battery‐based systems as well as the design considerations and constraints placed on each component. It discusses recent progress in the design and deployment of RFBs for energy‐related applications and the remaining obstacles and prospects. Finally, this study highlights the enormous potential of RFBs and suggests some solutions to scale up the use of RFBs in the near future.

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A Rheo-Impedance investigation on the interparticle interactions in the catalyst ink and its impact on electrode network formation in a proton exchange membrane fuel cell

Mehrazi,

Homayouni,

Kakati

et al. 2024

Applied Energy

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Promising aqueous dispersions of carbon black for semisolid flow battery application

Cited by 11 publications

References 113 publications

Dual Origin of Viscoelasticity in Polymer-Carbon Black Hydrogels: A Rheometry and Electrical Spectroscopy Study

Dual Origin of Viscoelasticity in Polymer-Carbon Black Hydrogels: A Rheometry and Electrical Spectroscopy Study

Lithium‐Free Redox Flow Batteries: Challenges and Future Prospective for Safe and Efficient Energy Storage

A Rheo-Impedance investigation on the interparticle interactions in the catalyst ink and its impact on electrode network formation in a proton exchange membrane fuel cell

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