Optimizing Main Materials for a Lithium- Air Battery of High Cycle Life

By optimizing the main materials in lithium-air batteries, namely sulfolane as electrolyte solvent, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) as electrolyte salt, carbon paper as current collector, and Li2O2-C hybrids as positive electrode materials, a performance of 800 cycles with a specific capacity of 1000 mAh g(-1) (based on the total mass of positive electrode materials) and an average energy efficiency of 74.72% has been achieved in this work and for the first time reported in the field of lithium-air battery. Sulfolane-based electrolyte and carbon paper current collector play the most critical role in building such a lithium-air battery of high cycle life. The findings described here are expected to benefit the pursuit of green, sustainable, and high-performance lithium-air batteries.