The intrinsically poor electrical conductivity of transition metal oxides is a critical challenge to obtain high electrochemical performance when these materials are used as the electrode of supercapacitors. In this study, the pseudo-capacitance features of perovskite (La0.75Sr0.25)(0.95)MnO3-delta (LSM) having a high electric conductivity of 44.9 S cm(-1) at room temperature was preliminarily investigated. The easily prepared LSM electrode was characterized by cyclic voltammetry and galvanostatic charge-discharge method to evaluate its electrochemical performances. The results show that LSM has pseudo-capacitance features and the specific capacitance is 56 F g(-1) at a scanning rate of 2 mV s(-1). This is the first report on the pseudo-capacitance value of LSM. Furthermore, the electrodes show no obvious capacitance degradation after 1000 cycles.
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机译：当这些材料用作超级电容器的电极时，过渡金属氧化物的固有差的电导率是获得高电化学性能的关键挑战。在这项研究中，初步研究了在室温下具有44.9 S cm（-1）高电导率的钙钛矿（La0.75Sr0.25）（0.95）MnO3-δ（LSM）的准电容特性。用循环伏安法和恒电流充放电法对易制备的LSM电极进行了表征，以评价其电化学性能。结果表明，LSM具有伪电容特性，在2 mV s（-1）的扫描速率下的比电容为56 F g（-1）。这是有关LSM伪电容值的第一份报告。此外，电极在1000次循环后没有显示出明显的电容降低。
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