Abstract

The La0.6Sr0.4CoO3 (LSCO) perovskite oxide has been synthesized by a dry gel combustion method and characterized by TGA, XRD, SEM and BET. The initial discharge capacities of LSCO/super-p electrode were 3672.1 mAh·g−1(carbon), 1418.4mAh·g−1(carbon) and 1237.5mAh·g−1(carbon) at the current densities of 30mA·g−1 50mA·g−1 and 80mA·g−1 respectively. The discharge capacity was maintained 16 times when the cut-off capacity was set as 500mA h·g−1(carbon). The electrochemical impedance spectroscopy (EIS) data revealed that the impedance of battery would increase more quickly if the current density became larger after the same cycles.

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