An Omics Approach to Mixed-Anion Electrolyte Discovery for Lithium Metal Batteries for Electric Aircraft

Here, we advance an omics approach to understand how lithium salts in locally super-concentrated electrolytes (LSCEs) should be mixed to create stable ionically conductive interphases in high-power Li|NMC811 cells charged to high voltage. Mixed-anion LCSEs maintain an areal ion flux of 6 mA cm–2 during discharge across 500 cycles with 70% capacity retention, outperforming single-salt LSCEs as well as single- and dual-salt concentrated electrolytes. These advantages stem from the enrichment of cathode–electrolyte interphases with fluoroethers, which suppress cathode corrosion and fracturing.