Fatigue Strength and Damage Behavior of Micron-Thick Ultrathin Current Collector Cu Foil and Al Foil for Lithium-Ion Battery

doi:10.11900/0412.1961.2022.00523

IMR OpenIR

	Fatigue Strength and Damage Behavior of Micron-Thick Ultrathin Current Collector Cu Foil and Al Foil for Lithium-Ion Battery
	Cheng Fulai 1,2; Luo Xuemei 1; Hu Bingli 1,2; Zhang Bin 3; Zhang Guangping 1
通讯作者	Luo Xuemei(xmluo@imr.ac.cn) ; Zhang Guangping(gpzhang@imr.ac.cn)
	2024-04-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:4 页码:522-536
摘要	With the rapid development of high-performance and high-energy-density lithium-ion batteries, lightweight current collector metal foils for lithium-ion batteries have become a crucial direction of industrial technological advancements. As the thickness of the current collector decreases, the fatigue failure problem becomes increasingly prominent. Once the fatigue failure of the current collector occurs, it will have a catastrophic impact on the electrochemical and safety performances of lithium-ion batteries. Here, to further clarify the fatigue damage mechanism of current collector foils, the high cycle fatigue strength and fatigue failure behavior of current collector Cu and Al foils for lithium-ion batteries under cyclic loading were experimentally investigated using tensile-tensile fatigue test and the EBSD technique. Results show that the fatigue cracks of the Cu foils mainly originate from the slip bands with larger grain sizes and propagate along the slip bands. Based on the microstructure observation and analysis of damaged grains, a statistical relationship between fatigue crack initiation and microstructure (grain size and its coefficient of variation, grain orientation, and Schmid factor (Omega)) of the Cu foils was obtained. Due to the presence of rolled defects on the surface of Al foils, the fatigue cracks are preferentially initiated at the surface defects. Extreme value statistics accurately predicted the possible defect population and the largest defect size in the Al foils, and the relationship between the defect size and fatigue limit was established using the Kitagawa-Takahashi diagram.
关键词	high cycle fatigue crack initiation ultrathin foil Kitagawa-Takahashi diagram current collector lithium-ion battery
资助者	National Natural Science Foundation of China
DOI	10.11900/0412.1961.2022.00523
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52071319]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001208569500011
出版者	SCIENCE PRESS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/185826
专题	中国科学院金属研究所
通讯作者	Luo Xuemei; Zhang Guangping
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Cheng Fulai,Luo Xuemei,Hu Bingli,et al. Fatigue Strength and Damage Behavior of Micron-Thick Ultrathin Current Collector Cu Foil and Al Foil for Lithium-Ion Battery[J]. ACTA METALLURGICA SINICA,2024,60(4):522-536.
APA	Cheng Fulai,Luo Xuemei,Hu Bingli,Zhang Bin,&Zhang Guangping.(2024).Fatigue Strength and Damage Behavior of Micron-Thick Ultrathin Current Collector Cu Foil and Al Foil for Lithium-Ion Battery.ACTA METALLURGICA SINICA,60(4),522-536.
MLA	Cheng Fulai,et al."Fatigue Strength and Damage Behavior of Micron-Thick Ultrathin Current Collector Cu Foil and Al Foil for Lithium-Ion Battery".ACTA METALLURGICA SINICA 60.4(2024):522-536.