Liu Binghang, Lv Tianshi, Zhou Anxing, Zhu Xiangzhen, Lin Zejing, Lin Ting, Suo Liumin
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, 100190, Beijing, China.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 100049, Beijing, China.
Nat Commun. 2024 Apr 4;15(1):2922. doi: 10.1038/s41467-024-47145-3.
Aluminum current collectors are widely used in nonaqueous batteries owing to their cost-effectiveness, lightweightness, and ease of fabrication. However, they are excluded from aqueous batteries due to their severe corrosion in aqueous solutions. Here, we propose hydrolyzation-type anodic additives to form a robust passivation layer to suppress corrosion. These additives dramatically lower the corrosion current density of aluminum by nearly three orders of magnitude to ~10 A cm. In addition, realizing that electrochemical corrosion accompanies anode prelithiation, we propose a prototype of self-prolonging aqueous Li-ion batteries (Al ||LiMnO ||TiO), whose capacity retention rises from 49.5% to 70.1% after 200 cycles. A sacrificial aluminum electrode where electrochemical corrosion is utilized is introduced as an electron supplement to prolong the cycling life of aqueous batteries. Our work addresses the short-life issue of aqueous batteries resulting from the corrosion of the current collector and lithium loss from side reactions.
铝集流体因其成本效益高、重量轻和易于制造而广泛应用于非水电池。然而，由于它们在水溶液中会发生严重腐蚀，因此被排除在水电池之外。在此，我们提出水解型阳极添加剂以形成坚固的钝化层来抑制腐蚀。这些添加剂将铝的腐蚀电流密度大幅降低近三个数量级，降至~10 A cm。此外，认识到电化学腐蚀伴随着阳极预锂化，我们提出了一种自延长水系锂离子电池的原型（Al ||LiMnO ||TiO），其在200次循环后容量保持率从49.5%提高到70.1%。引入利用电化学腐蚀的牺牲铝电极作为电子补充，以延长水电池的循环寿命。我们的工作解决了由于集流体腐蚀和副反应导致的锂损失而引起的水电池寿命短的问题。
