A high power Li–air battery enabled by a fluorocarbon additive

Abstract

The mass transfer of O₂ is a critical factor to determine the rate capability of Li–air batteries (LABs). Here, with improved O₂ transport enabled by a solution-phase fluorocarbon additive 3-[2-(perfluorohexyl)ethoxy]-1,2-epoxypropane, the LAB's discharge capacity was significantly elevated to 16 368 mA h g_carbon⁻¹@500 mA g_carbon⁻¹ and 1792 mA h g_carbon⁻¹@5000 mA g_carbon⁻¹ in N₂–O₂ (78 : 22) with power density comparable with state-of-the-art Li-ion batteries.