锂-镁-铝合金作为锂硫化聚丙烯腈电池的稳定负极

Lithium-Magnesium-Aluminum Alloy as a Stable Negative Electrode forLithium Sulfide Polyacrylonitrile Batteries

锂金属负极由于其低氧化还原电位和高理论比容量在锂硫化聚丙烯(S@PAN)电池中是一种备受关注的负极材料。然而,由于锂金属负极与电解质的副反应引发的锂枝晶的生长严重阻碍了其商业化过程。为了提高锂负极的整体和表面稳定性,研究了锂镁铝合金作为锂-S@PAN电池的负极。研究发现,锂镁铝合金负极能够有效抑制锂枝晶的形成和生长,锂铜半电池的库伦效率明显提高,并显著改善了全电池的循环性能。700次循环后,容量保持率为79%,远高于锂金属电极的64%。

Due to its low redox potential and high theoretical specific capacity,lithium metal anode is a kind of anode material that has attracted much attention in lithium sulfide polypropylene(S@PAN)batteries.However,the growth of lithium dendrites caused by the side reaction of the lithium metal negative electrode and the electrolyte severely hinders its commercialization process.In this paper,in order to improve the overall and surface stability of the lithium negative electrode,lithium-magnesium aluminum alloy as the negative electrode of the lithium-S@PAN battery was studied.Studies have found that the lithium-magnesium-aluminum alloy anode can effectively inhibit the formation and growth of lithium dendrites,the coulombic efficiency of the lithium-copper half-cell is significantly improved,and the cycle performance of the full battery is significantly improved.After 700 cycles,the capacity retention rate is 79%,which is much higher than 64%of lithium metal electrodes.