Abstract
1,4-dioxane (DOA) was originally used to pretreat the lithium metal electrode in order to improve its interface stability. Electrochemical impedance spectra (EIS) measurements reveal that with DOA pretreatment, lithium electrode has a low and stable interfacial resistance during the storage in electrolyte for a long time. And it is also found that the pretreated lithium electrode has an improved interfacial performance in repeated charge/discharge cycles. Furthermore, it is proved by SEM that the pretreated one has smooth morphology after long-time storage or repeated charge/discharge cycles. Consequentially, because of more stable interface characteristics of lithium electrode, the rechargeable lithium cell with DOA pretreated lithium anode has an obviously enhanced discharging performance and a better cycleability, compared with that of the cell using the untreated lithium anode.
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