Molecular‐Cling‐Effect of Fluoroethylene Carbonate Characterized via Ethoxy(pentafluoro)cyclotriphosphazene on SiOx/C Anode Materials – A New Perspective for Formerly Sub‐Sufficient SEI Forming Additive Compounds (Small 44/2023)

Silicon Anodes In article number 2302486, Martin Winter, Masoud Baghernejad, and co-workers investigate the complementary effect of fluoroethylene carbonate (FEC) and ethoxy(pentafluoro) cyclotriphosphazene as additive compounds in an aprotic organic electrolyte in NCM523 II SiOx/C pouch cells. The authors discuss a novel property of FEC, here called molecular-cling-effect (MCE) and verified it with multiple analysis techniques. Also they thoroughly discuss the electrochemical impact of the additives on the cell performance and the relevant underlying reaction mechanisms.