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

Authors


  • In memory of Luigi Aloisio Galvani and Alessandro Giuseppe Antonio Anastasio Volta, two great originators of the battery. Dedicated to K. M. Abraham and Peter G. Bruce for their outstanding contributions to lithium-air (oxygen) battery on the 30th anniversary of Shenzhen University and on the 3rd anniversary of the establishment of Shenzhen Key Laboratory of New Lithium-Ion Battery and Mesoporous Materials in Shenzhen, China

Abstract

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.

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