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Open AccessArticle

Effects of Island-Coated PVdF-HFP Composite Separator on the Performance of Commercial Lithium-ion Batteries

1
College of Chemical and Material Engineering, Quzhou University, Quzhou 324000, Zhejiang, China
2
Zhejiang Green New Materials Co., Ltd., Quzhou 324000, Zhejiang, China
3
MEET Battery Research Center, Institute of Physical Chemistry, University of Muenster, Muenster 48149, Germany
4
Zhejiang Juhua Co., Ltd., Quzhou 324004, Zhejiang, China
*
Author to whom correspondence should be addressed.
Coatings 2018, 8(12), 437; https://doi.org/10.3390/coatings8120437
Received: 31 August 2018 / Revised: 11 November 2018 / Accepted: 26 November 2018 / Published: 28 November 2018
(This article belongs to the Special Issue Thin Films for Advance Applications)
The widespread industrialization of high-energy density commercial lithium-ion batteries has long been challenged by issues of safety and efficiency stemming from uncontrollable lithium dendritic growths. Here, an island-coated composite separator has been fabricated using a pre-swelling process with water-based dispersions to address the issue of dendrite growth. The pre-swelling of the polymer particle surface balances the contradiction between the high crystallinity and electrolyte compatibility showing high electrolyte wettability and electrolyte uptake ability. Furthermore, the point-to-point surface structure can balance the high interfacial adhesion of electrodes and anti-deformation ability well, which is beneficial for preventing ripple-shaped and pot-shaped deformation, smoothing the solid particle morphology of the electrode and achieving a steady interfacial structure for lithium diffusion in cells. This new strategy constructs a non-continuous novel structure, achieving greatly improved dendrite growth suppressing and cell interface stabilization. This paper has opened up a new method for the development of low cost, simple process and easy industry of the lithium-ion pouch cell with improved quality and efficiency. View Full-Text
Keywords: lithium dendrite; island-coated separator; pre-swelling process; composite; lithium-ion batteries lithium dendrite; island-coated separator; pre-swelling process; composite; lithium-ion batteries
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Zhao, J.; Hu, Q.; Wang, J.; Zhang, P.; Zhu, Y.; Wu, G.; Lv, Y.; Lv, L.; Zhao, Y.; Yang, M. Effects of Island-Coated PVdF-HFP Composite Separator on the Performance of Commercial Lithium-ion Batteries. Coatings 2018, 8, 437.

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