Effect of additives on the stability of lithium-metal electrodes

Lithium metal anodes’ high reactivity with electrolytes results in the formation of diverse native solid electrolyte interphases (SEIs) compromising anodic stability and lithium metal battery performance. Cationic electrolyte additives are used in various battery chemistries to enhance performance and durability. Here, the effect of cationic additives on lithium metal stability is investigated in model DME-based electrolyte systems, including components such as redox mediators (LiI) and water. Significant differences are observed in the morphologies of the native SEIs formed, and the interactions with other electrolyte components appear to limit the suitability of certain additives in specific battery technologies.