A transmission electron microscopy study of the electrochemical process of lithium-oxygen cells.

Jung, Hun-Gi; Kim, Hee-Soo; Park, Jin-Bum; Oh, In-Hwan; Hassoun, Jusef; Yoon, Chong Seung; Scrosati, Bruno; Sun, Yang-Kook · Nano Lett · 2012

basic_science · Level V

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Abstract

The electrochemical reaction of a lithium-oxygen cell using a tetraethylene glycol dimethyl ether-lithium triflate, TEGDME-LiCF(3)SO(3) electrolyte, is investigated by a detailed transmission electron microscopy analysis. The results confirm the reversibility of the process by showing the formation-dissolution of lithium peroxide, Li(2)O(2), upon repeating cell charge and discharge cycles.