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Vacuum Evaporation Plating Enabling ≤ 10 µm Ultrathin Lithium Foils for Lithium Metal Batteries
Small ( IF 13.0 ) Pub Date : 2024-04-09 , DOI: 10.1002/smll.202312129 Yining Zhao 1 , Shaopeng Li 1 , Xiaowei Huang 1, 2 , Weiyi Chen 1 , Chenhui Wang 1 , Xiaowei Tang 2 , Hui Dou 1 , Xiaogang Zhang 1
Small ( IF 13.0 ) Pub Date : 2024-04-09 , DOI: 10.1002/smll.202312129 Yining Zhao 1 , Shaopeng Li 1 , Xiaowei Huang 1, 2 , Weiyi Chen 1 , Chenhui Wang 1 , Xiaowei Tang 2 , Hui Dou 1 , Xiaogang Zhang 1
Affiliation
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Lithium (Li) metal is widely recognized as a viable candidate for anode material in future battery technologies due to its exceptional energy density. Nevertheless, the commercial Li foils in common use are too thick (≈100 µm), resulting in a waste of Li resources. Herein, by applying the vacuum evaporation plating technology, the ultra-thin Li foils (VELi) with high purity, strong adhesion, and thickness of less than 10 µm are successfully prepared. The manipulation of evaporation temperature allows for convenient regulation of the thickness of the fabricated Li film. This physical thinning method allows for fast, continuous, and highly accurate mass production. With a current density of 0.5 mA cm−2 for a plating amount of 0.5 mAh cm−2, VELi||VELi cells can stably cycle for 200 h. The maximum utilization of Li is already more than 25%. Furthermore, LiFePO4||VELi full cells present excellent cycling performance at 1 C (1 C = 155 mAh g−1) with a capacity retention rate of 90.56% after 240 cycles. VELi increases the utilization of active Li and significantly reduces the cost of Li usage while ensuring anode cycling and multiplication performance. Vacuum evaporation plating technology provides a feasible strategy for the practical application of ultra-thin Li anodes.
中文翻译：
真空蒸发电镀可实现锂金属电池用≤10微米的超薄锂箔
由于其卓越的能量密度，锂（Li）金属被广泛认为是未来电池技术中阳极材料的可行候选者。然而，常用的商业锂箔太厚（约100微米），导致锂资源的浪费。在此，通过应用真空蒸发镀技术，成功制备了纯度高、附着力强、厚度小于10μm的超薄锂箔（VELi）。蒸发温度的控制可以方便地调节所制备的锂薄膜的厚度。这种物理减薄方法可以实现快速、连续且高精度的大规模生产。在0.5mAh cm -2的电流密度和0.5mAh cm -2的镀覆量下，VELi||VELi电池可以稳定循环200小时。锂的最大利用率已经超过25%。此外，LiFePO 4 ||VELi全电池在1 C（1 C = 155 mAh g -1 ）下表现出优异的循环性能，240次循环后容量保持率为90.56%。 VELi提高了活性锂的利用率，显着降低了锂的使用成本，同时保证了阳极循环和倍增性能。真空蒸发镀技术为超薄锂负极的实际应用提供了可行的策略。
更新日期：2024-04-09
中文翻译：
真空蒸发电镀可实现锂金属电池用≤10微米的超薄锂箔
由于其卓越的能量密度，锂（Li）金属被广泛认为是未来电池技术中阳极材料的可行候选者。然而，常用的商业锂箔太厚（约100微米），导致锂资源的浪费。在此，通过应用真空蒸发镀技术，成功制备了纯度高、附着力强、厚度小于10μm的超薄锂箔（VELi）。蒸发温度的控制可以方便地调节所制备的锂薄膜的厚度。这种物理减薄方法可以实现快速、连续且高精度的大规模生产。在0.5mAh cm -2的电流密度和0.5mAh cm -2的镀覆量下，VELi||VELi电池可以稳定循环200小时。锂的最大利用率已经超过25%。此外，LiFePO 4 ||VELi全电池在1 C（1 C = 155 mAh g -1 ）下表现出优异的循环性能，240次循环后容量保持率为90.56%。 VELi提高了活性锂的利用率，显着降低了锂的使用成本，同时保证了阳极循环和倍增性能。真空蒸发镀技术为超薄锂负极的实际应用提供了可行的策略。
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