亚微米级α相氧化铝粉体在锂离子电池PE隔膜涂层中的应用  

Application of sub-micronαphase alumina powder in PE membrane coating of lithium ion battery

作　　者：罗金华 赵能 Luo Jinhua;Zhao Neng(College of Vanadium and Titanium,Panzhihua University,Panzhihua 617000,Sichuan,China)

机构地区：[1]攀枝花学院钒钛学院,四川攀枝花617000

出　　处：《钢铁钒钛》2021年第5期74-78,共5页Iron Steel Vanadium Titanium

基　　金：四川省科技厅重点研发项目(2020YFG0216)。

摘　　要：对D_(50)=1.08μm的α-氧化铝粉体原料,通过物理法机械球磨制备亚微米级α-氧化铝粉体,然后将其应用在锂离子电池隔膜涂覆改性方面。将亚微米级α-氧化铝粉体应用于锂离子电池PE隔膜涂层,对比了涂覆前后PE隔膜性能的改变。结果表明:涂层致密平整,氧化铝颗粒均匀分布在PE隔膜表面,膜厚2.5μm,涂覆后面密度增加了4.0 g/m^(2),透气度增加0.482 s/mL,纵向和横向的热收缩率分别降低了1.3%和0.3%,拉伸强度分别提升了26.4MPa和3 MPa。In this paper,sub-micronα-alμmina powders were prepared by physical mechanical milling ofα-alumina powder with D_(50)=1.08μm,and then applied to lithium-ion battery separator coating modification.The sub-micronα-alumina powder was applied to the PE membrane coating of lithiumion 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 2.5μm.After the coating,the density increases by 4.0 g/m^(2),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.

关 键 词：α-相氧化铝粉 锂离子电池 PE隔膜涂层 透气性 强度 

分 类 号：TF124[冶金工程—粉末冶金] TM912.9[冶金工程—冶金物理化学]