Rheological characterization of Poly(ethylene oxide) and carboxymethyl cellulose suspensions with added solids

Skurtys, Olivier; Andrade, Ricardo; Osorio, Fernando

doi:10.1016/j.lwt.2015.05.047

Cited by 3 publications

(3 citation statements)

References 19 publications

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“…In addition, the critical shear rate (1/λ) can be calculated from the Cross model and indicates the point where a change in the flow behavior of the polymer toward a shear-thinning behavior occurs. As can be clearly seen, the 1/λ value at which the disentanglement of the polymer coils in solution occurs [14] progressively decreases for BM (11.11 s À1 ), KN (1.31 s À1 ), and MS (1.06 s À1 ), showing a clear effect of the shear of the mixing technique on the catholyte solutions.…”

Section: Rheological Characterization Of Catholyte Solutions and Cathode Slurriesmentioning

confidence: 87%

Relevance of the Catholyte Mixing Method for Solid‐State Composite Cathodes

et al. 2021

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The significant impact of the process steps on the electrode performance is one of the least developed aspects in the field of solid‐state batteries despite being a key issue for the transference of lab‐scale developments to production scale. To demonstrate that the knowledge of production parameters is essential, a set of high active material loading solid‐state batteries with a lithium metal anode and a polymer electrolyte is fabricated using different mixing methods for the catholyte preparation. Depending on the shear rate of the mixer, the polymer molecular weight and consequently, the viscosity of the catholyte is affected and these differences are preserved during the slurry preparation and electrode coating. The electrochemical performance of each cathode is studied in full‐cell configuration obtaining high areal capacities (≈1 mAh cm−2) and high specific capacities (92%, 82%, and 95% of the theoretical capacity of LiFePO4). After 50 cycles, composite cathodes mixed with high‐shear‐rate techniques experience a capacity fade related with the larger degree of deagglomeration of the C65 occurring when less viscous catholytes are used. Low‐shear‐rate cathodes keep the starting capacity, revealing a protective role of the catholyte during the wet‐mixing process.

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Section: Rheological Characterization Of Catholyte Solutions and Cathode Slurriesmentioning

confidence: 87%

Relevance of the Catholyte Mixing Method for Solid‐State Composite Cathodes

et al. 2021

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“…Experimental studies with the use of PEO solutions are described, e.g. in [19][20][21]. In [19] various mixtures of polycarbonate and poly(ethylene oxide) were tested, with a PEO content in a relatively wide range (5 to 30% by weight).…”

Section: Introductionmentioning

confidence: 99%

“…It was confirmed that the addition of PEO was an effective and efficient emulsifier that stabilizes emulsions. In paper [21] results of studies on rheological properties of suspensions of PEO and carboxymethyl cellulose (CMC) with high molecular weight were presented. The authors analyzed the influence of solid particles with various particle volume fractions on properties of mixtures.…”

Section: Introductionmentioning

confidence: 99%

Identification of Rheological Properties of Poly(ethylene Oxide) – Water Solutions

Wójtowicz

Kocewiak

Lipin

2020

IVKKT

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In the paper results of investigations of rheological properties for selected PEO-water solutions are presented. On the basis of measurements, carried out with use of rotational viscosimeter values of shear stresses were determined in the relatively wide range of shear rates. Rheological curves were described by the Ostwald de Waele model (or so-called power-law). The model coefficients such as the fluid consistency coefficient k and the flow behavior index n were determined using Levenberg−Marquardt algorithm for nonlinear estimation. The influence of temperature on properties and behavior examined non-Newtonian fluids was also determined. Results were processed in the curve shift parameter at. Experiments shown a significant effect of poly(ethylene oxide) concentration cPEO on rheological properties of examined solutions. For the lowest concentration (cPEO=1.2%) solutions exhibited properties similar to Newtonian fluids with values of n close to 1. With increasing of PEO concentration in water (cPEO=2.4-4.8%), solutions exhibited properties as non - Newtonian fluids, pseudoplastic, without yield limit. In these cases values of n were below unity and for the highest concentration (cPEO=4.8%) belonged to the range of n=0.5694-0.7536, depending on the temperature. Results of investigations can be used during numerical simulations, design and optimization of industrial equipment, working with fluids of this kind, including mixing vessels, columns or heat exchangers.

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Influence of rheology and activation energy on the structure of protective coatings formed from CMC suspensions with Al powder

Antonova

2021

Materials Today: Proceedings

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Rheological characterization of Poly(ethylene oxide) and carboxymethyl cellulose suspensions with added solids

Cited by 3 publications

References 19 publications

Relevance of the Catholyte Mixing Method for Solid‐State Composite Cathodes

Relevance of the Catholyte Mixing Method for Solid‐State Composite Cathodes

Identification of Rheological Properties of Poly(ethylene Oxide) – Water Solutions

Influence of rheology and activation energy on the structure of protective coatings formed from CMC suspensions with Al powder

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