Lithium Depletion and the Rechargeability of Li-O2 Batteries in Ether and Carbonate Electrolytes

Il Chan Jang, Shintaro Ida, Tatsumi Ishihara

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    Li metal is a highly promising candidate anode material because of its high energy density. However, Li depletion caused by the formation of a passivation layer and dendrites prevent the use of Li metal for rechargeable batteries. In this study, we investigate Li depletion in practical Li-O2 batteries by using two typical electrolytes, carbonate and ether, under high Li utilization. The ether-based solvent tetraethylene glycol dimethyl ether (TEGDME) showed greatly increased levels of Li depletion through the formation of both solid electrolyte interphase (SEI) layers and dendrites than carbonated-based solvents (ethylene carbonate/diethyl carbonate (EC/DEC)). Although TEGDME is known as a stable solvent for oxygen reduction species, it may be less appropriate as a solvent with respect to Li reactivity, which is very important for the cycle stability of Li-O2 battery systems. In contrast, although slight decomposition of EC-DEC was observed, cells constructed with EC-DEC were found to be more stable than those with TEGDME for Li-O2 batteries.

    Original languageEnglish
    Pages (from-to)1380-1384
    Number of pages5
    JournalChemElectroChem
    Volume2
    Issue number9
    DOIs
    Publication statusPublished - Sep 1 2015

    All Science Journal Classification (ASJC) codes

    • Catalysis
    • Electrochemistry

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