Application of sub-micron α phase alumina powder in PE membrane coating of lithium ion battery

Luo Jinhua; Zhao Neng

doi:10.7513/j.issn.1004-7638.2021.05.012

Volume 42 Issue 5

Oct. 2021

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Luo Jinhua, Zhao Neng. Application of sub-micron α phase alumina powder in PE membrane coating of lithium ion battery[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(5): 74-78. doi: 10.7513/j.issn.1004-7638.2021.05.012

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Luo Jinhua, Zhao Neng. Application of sub-micron α phase alumina powder in PE membrane coating of lithium ion battery[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(5): 74-78. doi: 10.7513/j.issn.1004-7638.2021.05.012

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Application of sub-micron α phase alumina powder in PE membrane coating of lithium ion battery

doi: 10.7513/j.issn.1004-7638.2021.05.012

College of Vanadium and Titanium, Panzhihua University, Panzhihua 617000, Sichuan, China

Received Date: 2021-08-13
Publish Date: 2021-10-30

Abstract

Abstract

In this paper, sub-micron α-alμmina powders were prepared by physical mechanical milling of α-alumina powder with D₅₀ = 1.08 μm, and then applied to lithium-ion battery separator coating modification. The sub-micron α-alumina powder was applied to the PE membrane coating of lithium-ion battery. The results show that the coating is compact and flat, and the alumina particles are evenly distributed on the surface of PE film. The thickness of the film is 2.5 μm. After the coating, the density increases by 4.0 g/m², the air permeability increases by 48.2 s, the thermal shrinkage decreases by 1.3% and 0.3%, and the tensile strength increases by 26.4 MPa and 3 MPa, respectively.
- α-alumina powder,
- lithium-ion battery,
- PE film coating,
- air permeability,
- tensile strength

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References(13)

References

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