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

被引:4
|
作者
Zhao, Junhua [1 ]
Hu, Qin [2 ]
Wang, Jun [3 ]
Zhang, Pinjie [4 ]
Zhu, Youliang [1 ]
Wu, Guoqiang [1 ]
Lv, Yanwen [1 ]
Lv, Liang [1 ]
Zhao, Yongjin [1 ]
Yang, Meiting [1 ]
机构
[1] Quzhou Univ, Coll Chem & Mat Engn, Quzhou 324000, Zhejiang, Peoples R China
[2] Zhejiang Green New Mat Co Ltd, Quzhou 324000, Zhejiang, Peoples R China
[3] Univ Munster, Inst Phys Chem, MEET Battery Res Ctr, D-48149 Munster, Germany
[4] Zhejiang Juhua Co Ltd, Quzhou 324004, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
lithium dendrite; island-coated separator; pre-swelling process; composite; lithium-ion batteries; MEMBRANES; DENDRITE; GRAPHITE; STRESS;
D O I
10.3390/coatings8120437
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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.
引用
收藏
页数:9
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