锂离子电池用微米厚度超薄集流体Cu箔和Al箔疲劳强度及损伤行为

程福来, 罗雪梅, 胡炳利, 张滨, 张广平

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

CHENG Fulai, LUO Xuemei, HU Bingli, ZHANG Bin, ZHANG Guangping

图7 13 μm厚Al箔高周疲劳试样在应力幅64 MPa、总寿命为1.4 × 106 cyc的表面损伤形貌SEM像、裂纹的高倍SEM像以及裂纹附近的EBSD像

Fig.7 Surface damage morphology (a) and high magnified (b) SEM images, and EBSD characterization (c) of 13 μm-thick Al foils under a stress amplitude of 64 MPa and fatigue life of 1.4 × 106 cyc (Black line, gray line, and red line in Fig.7c represent high angle grain boundaries (> 10°), low angle grain boundaries (2°~10°), and crack propagation path, respectively)