Electrochemical performance of Li1-xNaxV3O8 electrodes in lithium sulfate-water-ethanol system
A series of Li1-xNaxV3O8 materials was prepared by solution reaction followed by calcination method and their electrochemical performances in 2 M Li2SO4-water-ethanol solution as negative electrodes for aqueous electrolyte lithium ion battery were studied and compared each other. X-ray diffraction analysis revealed that partially substituting sodium for lithium in LiV3O8 could increase the interlayer distances of (100) plane. Cyclic voltammetric experiments have demonstrated that the Li+ insertion and extraction kinetics of Li0.7Na0.3V3O8 is superior to that of LiVaO8. Charge/discharge results showed that the discharge specific capacity of Li0.7Na0.3VaO8 electrode is higher than that of LiV3O8 electrode.
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