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Study on coating uniformity in lithium-ion battery electrode slot-die coating based on three-dimensional simulation.

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Title: Study on coating uniformity in lithium-ion battery electrode slot-die coating based on three-dimensional simulation.
Authors: Wu, Zeluan1 (AUTHOR), Li, Minglin1,2 (AUTHOR) liminglin@fzu.edu.cn, Gou, Jiangxin2 (AUTHOR), Liu, Junxian1 (AUTHOR), Liu, Jinxu2 (AUTHOR), Lai, Lianfeng3 (AUTHOR) lailianfeng@ndnu.edu.cn
Source: Journal of Coatings Technology & Research. May2026, Vol. 23 Issue 3, p1149-1158. 10p.
Subjects: Lithium-ion batteries, Three-dimensional flow, Capillary flow, Thin film devices, Coatings industry, Surface coatings
Abstract: Slot-die coating technology, as a critical process in lithium-ion battery electrode manufacturing, holds significant importance for the production of high-performance batteries. However, controlling the surface uniformity of the thin film has consistently been a bottleneck in this field. This study employs three-dimensional flow field simulation technology to conduct an in-depth investigation into the lithium battery coating process, aiming to elucidate the influence mechanisms of coating speed and coating gap on coating uniformity. By constructing the coating window using the capillary number (Ca) and the dimensionless gap (H*), this research found that a capillary number ranging from 0.5 to 3, combined with a dimensionless gap between 0.675 and 0.85, ensures stable coating operation. Within the suitable coating window range, by regulating the coating speed to stabilize the upstream meniscus at the center of the upper die lip, the surface uniformity of the thin film can be effectively enhanced. Furthermore, increasing the coating gap can also improve the uniformity of the thin film. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Coatings Technology & Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 194808527
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Study on coating uniformity in lithium-ion battery electrode slot-die coating based on three-dimensional simulation.
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  Data: <searchLink fieldCode="AR" term="%22Wu%2C+Zeluan%22">Wu, Zeluan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Minglin%22">Li, Minglin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> liminglin@fzu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Gou%2C+Jiangxin%22">Gou, Jiangxin</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Junxian%22">Liu, Junxian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Jinxu%22">Liu, Jinxu</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lai%2C+Lianfeng%22">Lai, Lianfeng</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> lailianfeng@ndnu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Coatings+Technology+%26+Research%22">Journal of Coatings Technology & Research</searchLink>. May2026, Vol. 23 Issue 3, p1149-1158. 10p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Lithium-ion+batteries%22">Lithium-ion batteries</searchLink><br /><searchLink fieldCode="DE" term="%22Three-dimensional+flow%22">Three-dimensional flow</searchLink><br /><searchLink fieldCode="DE" term="%22Capillary+flow%22">Capillary flow</searchLink><br /><searchLink fieldCode="DE" term="%22Thin+film+devices%22">Thin film devices</searchLink><br /><searchLink fieldCode="DE" term="%22Coatings+industry%22">Coatings industry</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+coatings%22">Surface coatings</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Slot-die coating technology, as a critical process in lithium-ion battery electrode manufacturing, holds significant importance for the production of high-performance batteries. However, controlling the surface uniformity of the thin film has consistently been a bottleneck in this field. This study employs three-dimensional flow field simulation technology to conduct an in-depth investigation into the lithium battery coating process, aiming to elucidate the influence mechanisms of coating speed and coating gap on coating uniformity. By constructing the coating window using the capillary number (Ca) and the dimensionless gap (H*), this research found that a capillary number ranging from 0.5 to 3, combined with a dimensionless gap between 0.675 and 0.85, ensures stable coating operation. Within the suitable coating window range, by regulating the coating speed to stabilize the upstream meniscus at the center of the upper die lip, the surface uniformity of the thin film can be effectively enhanced. Furthermore, increasing the coating gap can also improve the uniformity of the thin film. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Coatings Technology & Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1007/s11998-025-01232-2
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 10
        StartPage: 1149
    Subjects:
      – SubjectFull: Lithium-ion batteries
        Type: general
      – SubjectFull: Three-dimensional flow
        Type: general
      – SubjectFull: Capillary flow
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      – SubjectFull: Thin film devices
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      – SubjectFull: Coatings industry
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      – SubjectFull: Surface coatings
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      – TitleFull: Study on coating uniformity in lithium-ion battery electrode slot-die coating based on three-dimensional simulation.
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          Name:
            NameFull: Wu, Zeluan
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          Name:
            NameFull: Li, Minglin
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            NameFull: Gou, Jiangxin
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            NameFull: Liu, Junxian
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            NameFull: Liu, Jinxu
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            NameFull: Lai, Lianfeng
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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