Effective Solid Electrolyte Interphase Formation on Lithium Metal Anodes by Mechanochemical Modification

• DOI: 10.1021/acsami.1c07490
• Publication Date: 2021-07-15T16:46:03Z
• Authors: Julia Wellmann; Jan-Paul Brinkmann; Björn Wankmiller; Kerstin Neuhaus; Uta Rodehorst; Michael R. Hansen; Martin Winter; Elie Paillard
• Keywords: Lithium metal; Interphase; Dendrite (mathematics)

Lithium metal batteries are gaining increasing attention due to their potential for significantly higher theoretical energy density than conventional lithium ion batteries. Here, we present a novel mechanochemical modification method anodes, involving roll-pressing the foil in contact with ionic liquid-based solutions, enabling formation of an artificial solid electrolyte interphase favorable properties such as improved transport and, most importantly, suppression dendrite growth, allowing homogeneous electrodeposition/-dissolution using and highly conductive room temperature alkyl carbonate-based electrolytes. As result, stable cycling symmetrical Li∥Li cells is achieved even at high current 10 mA cm–2. Furthermore, rate capability capacity retention NMC∥Li improved.