Insight into Fluoride Additives to Enhance Ammonia Production from Lithium‐Mediated Electrochemical Nitrogen Reduction Reaction

Abstract Demands for green ammonia production increase due to its application as a proton carrier, and recent achievements in electrochemical Li‐mediated nitrogen reduction reactions (Li‐NRRs) show promising reliability. Here, it is demonstrated that F‐containing additives in the electrolyte improve ammonia production by modulating the solid electrolyte interphase (SEI). It is suggested that the anionic additives with low lowest unoccupied molecular orbital levels enhance efficiency by contributing to the formation of a conductive SEI incorporated with LiF. Specifically, as little as 0.3 wt.% of BF 4 − additive to the electrolyte, the Faradaic efficiency (FE) for ammonia production is enhanced by over 15% compared to an additive‐free electrolyte, achieving a high yield of 161 ± 3 nmol s −1 cm −2 . The BF 4 − additive exhibits advantages, with decreased overpotential and improved FE, comp…