Operability coating window of dual-layer slot coating process using viscocapillary model

Ji, Ho Suk; Ahn, Won Gi; Kwon, Ilyoung; Nam, Jaewook; Jung, Hyun Wook

doi:10.1016/j.ces.2015.12.016

Cited by 22 publications

(6 citation statements)

References 19 publications

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“…A stable coating is obtained when the coating bead forms stable liquid–vapor interfaces with its environment (Figure S2). − If the pressure inside the bead is too large, then the ink swells out in all directions, leading to a defect called leaking. This defect leads to loss of control over the coating width and thickness.…”

Section: Resultsmentioning

confidence: 99%

Scalable Manufacturing of Hybrid Solid Electrolytes with Interface Control

Dixit

Zaman

Bootwala

et al. 2019

ACS Appl. Mater. Interfaces

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Hybrid solid electrolytes are promising alternatives for high energy density metallic lithium batteries. Scalable manufacturing of multi-material electrolytes with tailored transport pathways can provide an avenue toward controlling Li stripping and deposition mechanisms in all-solid-state devices. A novel roll-to-roll compatible coextrusion device is demonstrated to investigate mesostructural control during manufacturing. Solid electrolytes with 25 and 75 wt % PEO-LLZO compositions are investigated. The coextrusion head is demonstrated to effectively process multimaterial films with strict compositional gradients in a single pass. An average manufacturing variability of 5.75 ± 1.2 μm is observed in the thickness across all the electrolytes manufactured. Coextruded membranes with 1 mm stripes show the highest room temperature conductivity of 8.8 × 10–6 S cm–1 compared to the conductivity of single-material films (25 wt %, 1.2 × 10–6 S cm–1; 75 wt %, 1.8 × 10–6 S cm–1). Distribution of relaxation times and effective mean field theory calculations suggest that the interface generated between the two materials possesses high ion-conducting properties. Computational simulations are used to further substantiate the influence of macroscale interfaces on ion transport.

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Section: Resultsmentioning

confidence: 99%

Scalable Manufacturing of Hybrid Solid Electrolytes with Interface Control

Dixit

Zaman

Bootwala

et al. 2019

ACS Appl. Mater. Interfaces

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“…To study the influence of the inlet position, it is necessary to simulate the flow field in the die first. Generally, the flow field in the die head is simulated by simplifying the Navier-Stokes equation [3], as a result, some substantive suggestions were put forward for production practice. However, due to the development of computer, the previous simulation is often only for two-dimensional cases, thus can only do qualitative inference, rather than quantitative analysis.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of Inlet Position on the Transverse Homogeneity of Slot Coating

Ma,

Tang,

et al. 2023

J. Phys.: Conf. Ser.

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Slot coating is a widely used method for high performance material production. Coating quality mainly depends on whether the coating liquid can be evenly coated on the material. To be evenly coated, the coating liquid is required to have good transverse velocity uniformity at the exit of the die. The position of the inlet of the die has an important effect on the horizontal uniformity of the die. In order to quantitatively analyze the influence of the inlet position of the die head on the transverse uniformity of the die, we respectively simulated the internal flow field of two different shapes of uniform cross section die head, and finally got the preliminary law. It is found that no matter the shape and structure of the cavity, the transverse uniformity of the coating can be greatly improved using the intermediate feeding method.

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“…At that time, the Navier-Stokes equation was greatly simplified according to the geometric symmetry of the die and the flow characteristics of the coating liquid inr the die. These simplified models were used to predict the flow field in the die, and many important conclusions and rules were summarized which are of guiding significance to the production practice [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Modelling and Simulation of Transverse Homogeneity of Slotted Coating Process

Wang¹,

Zhong²,

Li³

et al. 2022

J. Phys.: Conf. Ser.

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Slot coating is a kind of precise coating process, which is widely used in the production of membrane materials. The thickness deviation of coating along the transverse direction is the key index to measure the coating quality. The homogeneity of the transverse distribution of the coating velocity at the exit of the die is the most direct factor leading to the transverse thickness deviation of the coating. To predict the transverse homogeneity of slot coating, a mathematical model for the internal flow field in the die was established, where the incompressible Navier-Stokes equations were used to describe the fluid flow and generalized Newtonian fluid model was used to describe the rheological behaviour of non-Newtonian coating. An efficient explicit splitting algorithm based on finite element method is proposed to solve the model. To verify the effectiveness of the model and the algorithm, the internal flow field of a trapezoidal double cavity die with equal section was simulated. The transverse homogeneity obtained was close to the experimental measured value, which verified the validity of the model. Furthermore, the influence of measuring slot width on the transverse homogeneity of outlet velocity is studied, and the simulation results are consistent with the theoretical expectations.

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Operability coating window of dual-layer slot coating process using viscocapillary model

Cited by 22 publications

References 19 publications

Scalable Manufacturing of Hybrid Solid Electrolytes with Interface Control

Scalable Manufacturing of Hybrid Solid Electrolytes with Interface Control

Analysis of the Influence of Inlet Position on the Transverse Homogeneity of Slot Coating

Modelling and Simulation of Transverse Homogeneity of Slotted Coating Process

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