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

罗金华; 赵能

doi:10.7513/j.issn.1004-7638.2021.05.012

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

doi: 10.7513/j.issn.1004-7638.2021.05.012

罗金华,
赵能

攀枝花学院钒钛学院, 四川攀枝花 617000

基金项目: 四川省科技厅重点研发项目（2020YFG0216）。

详细信息

作者简介:
罗金华（1981—），男，湖南郴州人，博士，讲师，长期从事纳米新材料方面的研究工作，E-mail:ljhazq020312@163.com。

中图分类号: TF124,TM912.9
计量
- 文章访问数: 376
- HTML全文浏览量: 108
- PDF下载量: 25
- 被引次数: 0
出版历程
- 收稿日期: 2021-08-13
- 刊出日期: 2021-10-30

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

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

摘要

摘要: 对D₅₀=1.08 μm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2.5 μm，涂覆后面密度增加了4.0 g/m²，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26.4 MPa和3 MPa。
- α-相氧化铝粉 /
- 锂离子电池 /
- PE隔膜涂层 /
- 透气性 /
- 强度
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

HTML全文

图 1 不同粒径α-氧化铝粉体的XRD谱

Figure 1. XRD patterns of α-alumina powders with different particle sizes

下载: 全尺寸图片幻灯片

图 2 不同粒径α-氧化铝粉体的SEM形貌

Figure 2. SEM images of α -alumina powders with different particle sizes

下载: 全尺寸图片幻灯片

图 3 D₅₀=0.42 μm氧化铝粉体的DSC-TG曲线

Figure 3. DSC-TG curve of alumina powder D₅₀=0.42 μm

下载: 全尺寸图片幻灯片

图 4 涂覆亚微米级α-氧化铝前后PE隔膜的SEM形貌

Figure 4. SEM image of PE membrane coated with sub-micron α-alumina

下载: 全尺寸图片幻灯片

表 1 涂覆亚微米级α-氧化铝前后PE隔膜的基本性状

Table 1. Basic properties of PE membrane coated with sub-micron α-alumina

状态	厚度/μm	面密度/(g·m⁻²)	透气度/(s·mL⁻¹)	孔隙率/%
涂覆前	6.2	5.2	1.75	40
涂覆后	8.7	9.2	2.232	38.1
注：厚度检测方法按照GB/T 6672—2001进行；透气度检测方法按照GB/T 458—2008进行；面密度和孔隙率采用重量法检测。

下载: 导出CSV

表 2 涂覆亚微米级α-氧化铝前后PE隔膜的热收缩率对比

Table 2. Comparison of the thermal shrinkage of PE membrane before and after submicron α-alumina coating

状态	热收缩率/%
状态	纵向MD	横向TD
涂覆前	3.2	0.6
涂覆后	1.9	0.3

下载: 导出CSV

表 3 涂覆亚微米级α-氧化铝前后PE隔膜的拉伸强度对比

Table 3. Comparison of the tensile strength of PE membrane before and after submicron α-alumina coating

状态	拉伸强度/MPa
状态	纵向MD	横向TD
涂覆前	157	106
涂覆后	183.4	109

下载: 导出CSV

参考文献(13)

[1]	Wang Chang, Wu Dayong. Lithium ion battery separator and technical progress[J]. Energy Storage Science and Technology, 2016,5(2):120−128. (王畅, 吴大勇. 锂离子电池隔膜及技术进展[J]. 储能科学与技术, 2016,5(2):120−128. doi: 10.3969/j.issn.2095-4239.2016.02.002
[2]	Xiao Wei, Gong Yaqun, Wang Hong, et al. Advances in lithium-ion battery separator technology[J]. Energy Storage Science and Technology, 2016,5(2):188−196. (肖伟, 巩亚群, 王红, 等. 锂离子电池隔膜技术进展[J]. 储能科学与技术, 2016,5(2):188−196. doi: 10.3969/j.issn.2095-4239.2016.02.010
[3]	Zhao H L, Chen J T, Rao G Y, et al. Enhancing photocatalytic CO₂ reduction by coating an ultrathin Al₂O₃ layer on oxygen deficient TiO₂ nanorods through atomic layer deposition[J]. Applied Surface Science, 2017,404(15):49−56.
[4]	Shi Linpu, Zhao Yanfei, Xue Jianqiang, et al. Size and molding pressure on sintering behavior of α-alumina powder[J]. Material Development and Application, 2020,35(1):1−4. (师琳璞, 赵延飞, 薛建强, 等. 粒径及成型压力对α氧化铝粉体烧结行为的影响[J]. 材料开发与应用, 2020,35(1):1−4.
[5]	Wang Shifeng, Wang Huanping, Zhou Guangmiao, et al. Preparation and characterization of α-Al₂O₃ submicron powders synthesized at low temperature by sol-gel method[J]. CIESC Journal, 2010,61(12):3290−3295. (王世锋, 王焕平, 周广淼, 等. 溶胶-凝胶法低温合成亚微米α-Al₂O₃的制备与表征[J]. 化工学报, 2010,61(12):3290−3295.
[6]	He Wenlong, Yu Yang, He Chen. Preparation of nano-Al₂O₃ and its application in ceramic ultrafiltration membrane[J]. Chinese Ceramics, 2019,55(7):1−8. (何文龙, 余阳, 和丞. 纳米Al₂O₃的制备及在陶瓷超滤膜制备上的应用研究[J]. 中国陶瓷, 2019,55(7):1−8.
[7]	Mirzaeian M, Abbas Q, Hunt M, et al. Pseudocapacitive effect of carbons doped with different functional groups as electrode materials for electrochemical capacitors[J]. Energies, 2020,13(21):5577−5579. doi: 10.3390/en13215577
[8]	Kumar S, Asit Kumar K, Roy J. Processing and properties of sintered submicron IR transparent alumina derived through sol–gel method[J]. Journal of Sol Gel Science and Technology, 2018,86(2):374−382. doi: 10.1007/s10971-018-4651-9
[9]	Xu Jian, He Linli, Jing Xiwei, et al. Preparation and properties of polyethylene separator modified by alumina / acrylate emulsion[J]. Fine Chemical Industry, 2019,36(7):1321−1325. (徐健, 何林莉, 景希玮, 等. 氧化铝/丙烯酸酯乳液改性聚乙烯隔膜的制备及性能[J]. 精细化工, 2019,36(7):1321−1325.
[10]	Ibrahim A, Zhao Jiaqi, Shi Meng, et al. Cyclic stability of Al-doped lithium manganese materials in water-based lithium ion batteries[J]. Energy Storage Science and Technology, 2021,(4):1330−1337. (Ibrahim A, 赵佳琦, 师萌, 等. Al掺杂锰酸锂材料在水系锂离子电池中的循环稳定性[J]. 储能科学与技术, 2021,(4):1330−1337.
[11]	Chinelatto A S A, Tomasi R. Influence of processing atmosphere on the microstructural evolution of submicron alumina powder during sintering[J]. Ceramics International, 2009,35(7):2915−2920. doi: 10.1016/j.ceramint.2009.03.037
[12]	Sun Z Q, La B Q, Peng H, et al. Alumina ceramics with uniform grains prepared from Al₂O₃ nanospheres[J]. Journal of Alloys and Compounds, 2016,688(3):933−938.
[13]	Liu H M, Li M, Dao T, et al. Design of Pd Au alloy plasmonic nanoparticles for improved catalytic performance in CO₂ reduction with visible light irradiation[J]. Nano Energy, 2016,26(12):398−404.