Effect of soluble polymer binder on particle distribution in a drying particulate coating

Buss, Felix; Roberts, Christine Cardinal; Crawford, Kathleen S.; Peters, K.; Francis, Lorraine F.

doi:10.1016/j.jcis.2011.03.054

Cited by 68 publications

(64 citation statements)

References 19 publications

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“…(9), which is based on a simple mass balance between time steps and assumes that polymer concentration throughout the film is uniform. This assumption is supported by the experimentally observed linear decrease in film thickness with time at both 25 and 45 • C [33] (Supporting information, Fig. S6).…”

Section: Model Development and Comparison With Experimentssupporting

confidence: 69%

Sag in drying coatings: Prediction and real time measurement with particle tracking

Lade

Song

Musliner

et al. 2015

Progress in Organic Coatings

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a b s t r a c tSag is a coating phenomenon characterized by gravity-driven flow after deposition; excessive amounts of sag can lead to coating defects. In this work, a new method for evaluating and quantifying sag is investigated. The motion of micron-sized Lycopodium spores on an inclined coating surface is tracked during drying, and the resulting surface velocity data is used to determine sag length. This in situ particle tracking method is minimally invasive and permits real time measurements. Measured sag lengths and real time surface velocities in aqueous polyvinyl alcohol solution coatings compare well with a theoretical model. The model is also used to develop a predictive sag regime map, which anticipates the extent of sag given coating properties and process-specific parameters. This map also identifies viable processing windows and aids in intelligent coating design given specific process constraints. The predictions of the sag regime map are compared against experimental sag results from polyvinyl alcohol solution coatings as well as four commercial latex paints, revealing good agreement for coatings with Newtonian or 'Newtonian-like' rheologies.

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Section: Model Development and Comparison With Experimentssupporting

confidence: 69%

Sag in drying coatings: Prediction and real time measurement with particle tracking

Lade

Song

Musliner

et al. 2015

Progress in Organic Coatings

Self Cite

View full text Add to dashboard Cite

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“…The influence of sedimentation, diffusion and evaporation rate is then estimated by a drying regime map based on calculations and experiments [31,32] or a comparison of Pe and s N to a value of 1 [30,33]. A different approach that estimates the possibility of a consolidation layer formation independently of the overall film height was applied here.…”

Section: Discussionmentioning

confidence: 99%

Delamination behavior of lithium-ion battery anodes: Influence of drying temperature during electrode processing

et al. 2015

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One essential process step during electrode processing for Li-ion batteries is the drying of the wet particulate electrode coating. The electrode film solidifies during evaporation of the solvent and a porous film is formed. In this study we focus on the influence of drying temperature on the internal electrode structure of the dry film. Anode slurries that consist of graphite and an aqueous binder system were coated and subsequently dried. To assure defined and controllable drying conditions, a laboratory set-up with a temperaturecontrolled substrate carrier and an impingement dryer was used. To facilitate a scale-up to continuously passed dryers the choice of experimental temperatures was based on a calculation of steady-state temperatures that result from gas temperatures that are commonly applied in industrial drying processes. The delamination behavior of the differently dried electrodes was investigated by means of a 90° peel test. The results show a strong dependency of electrode adhesion on drying temperature. A lower adhesion force at higher temperatures hints to a variation in binder content at the interface between the copper substrate and the coating layer. The formation of a consolidation Downloaded by [University of Manitoba Libraries] at 22:53 26 August 20152 layer at the air-film interface during drying is identified as a possible explanation and a criterion for consolidation layer formation is suggested.

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“…However, high‐temperature drying may also cause surface defects, uneven distribution of particles, binder migrations, and other heterogeneous structure problems. All of these factors may affect the electrochemical performance of the composite LIBs …”

Section: Introductionmentioning

confidence: 99%

Improvement of Lithium‐Ion Battery Performance by Two‐Layered Slot–Die Coating Operation

et al. 2017

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The cathode and anode electrodes in lithium‐ion batteries typically contain a significant proportion of particles and binders. During the electrode drying process, high temperature will lead to the binder migration phenomenon. Uneven particle/binder distribution can cause poor adhesion between coating and substrate, disruption of conductive paths, and decrease in electrode performance. In this study, a two‐layered cathode was designed by using separate compositions of slurry ingredients in each layer, as produced by means of a simultaneous multilayer coating method. The two‐layered cathode with the top layer containing less binder than the bottom layer yielded a better particle/binder distribution in the final structure under high‐temperature drying. A battery made with the two‐layered cathode appeared to give a better overall performance.

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Effect of soluble polymer binder on particle distribution in a drying particulate coating

Cited by 68 publications

References 19 publications

Sag in drying coatings: Prediction and real time measurement with particle tracking

Sag in drying coatings: Prediction and real time measurement with particle tracking

Delamination behavior of lithium-ion battery anodes: Influence of drying temperature during electrode processing

Improvement of Lithium‐Ion Battery Performance by Two‐Layered Slot–Die Coating Operation

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