摘要
1,3-dioxolane (DOL) is originally used to pretreat the lithium metal electrode in order to passivate lithium metal and improve its interface stability. Through electrochemical impedance spectra (EIS) and cathodic polarization measurements of pretreated and untreated electrodes, it was found that 1,3-dioxolane could form a stable passivating film on the surface of lithium electrode. And such film could enhance effectively the interfacial stability of lithium electrode, without depressing its kinetics characteristic. Consequentially, further tests of the cell-performance during repeated charge/discharge cycles showed that the cell with DOL pretreated anode had better discharging performance and longer cycle life because of the passivating and protective effects of 1,3-dioxolane pretreatment on lithium electrode.
1,3-dioxolane (DOL) is originally used to pretreat the lithium metal electrode in order to passivate lithium metal and improve its interface stability. Through electrochemical impedance spectra (EIS) and cathodic polarization measurements of pretreated and untreated electrodes, it was found that 1,3-dioxolane could form a stable passivating film on the surface of lithium electrode. And such film could enhance effectively the interfacial stability of lithium electrode, without depressing its kinetics characteristic. Consequentially, further tests of the cell-performance during repeated charge/discharge cycles showed that the cell with DOL pretreated anode had better discharging performance and longer cycle life because of the passivating and protective effects of 1,3-dioxolane pretreatment on lithium electrode.
基金
ProjectsupportedbytheFoundationofScienceTechnologyResearchProgramofGuangdongProvince(2003C105006)andtheFoundationofKeyScienceTechnologyProgramofGuangdongProvince(2003A1100101)
