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A Lithium-Oxygen Battery Based on Lithium Superoxide – Amin Salehi publication in Nature

Amin Salehi, Ph.D., Mechanical Engineering (from UIC Electrochemistry Collaborative) and collaborators from Argonne National Laboratory and students have had their paper, "A Lithium-Oxygen Battery Based on Lithium Superoxide" accepted for publication in Nature. (Impact Factor 41.46), marking the inclusion of a Mechanical and Industrial Engineering paper. Abstract follows below.

"A Lithium-Oxygen Battery Based on Lithium Superoxide"

Although the superoxide of lithium (LiO2) is believed to be a key intermediate in Li-O2 batteries leading to the formation of lithium peroxide, LiO2has never been observed in its pure state. In this work, we provide evidence that use of a cathode based on a reduced graphene oxide with Ir nanoparticles in a Li-O2 battery results in a LiO2 discharge product formed by single electron transfer without further electron transfer or disproportionation to form Li2O2. Differential electrochemical mass spectroscopy (DEMS) and high energy X-ray diffraction (HE-XRD) patterns indicate the presence of LiO2 with no evidence of Li2O2 or Li2O. The HE-XRD studies as a function of time also show that LiO2 can be stable in its crystalline form after one week of aging in the presence of electrolyte. The results provide evidence that LiO2 is stable enough that it can be repeatedly charged and discharged with a very low charge potential (~3.2 V) and may open the avenue for a lithium superoxide-based battery.