An optimized LiNO3/DMSO electrolyte for high-performance rechargeable Li–O2 batteries

Abstract

Finding stable electrolytes is essential to address the poor cycling capability of current rechargeable non-aqueous Li–O₂ batteries. An optimized dimethyl sulfoxide (DMSO) based electrolyte using lithium nitrate (LiNO₃) as the lithium salt has been first investigated for rechargeable Li–O₂ batteries. The charge over-potential of Li–O₂ batteries with LiNO₃/DMSO electrolyte is 0.42 V lower than that of batteries with LiClO₄/DMSO electrolyte. The Li–O₂ batteries with LiNO₃/DMSO electrolyte also showed excellent high C-rate performance and good cycling stability.