Perovskite oxide LaCoO3 electrode as high performance pseudocapacitor

Electrochemical energy storage using pseudocapacitors employs fast reversible surface faradaic redox reactions to provide high performance renewable energy devices at very low cost. In this study, perovskite type oxide LaCoO3 (LCO) nanoparticles are synthesized by co-precipitation method. The structural and morphological study of the sample are analyzed by X-ray diffraction and scanning electron microscopy. The electrochemical performance of LCO as an active material for supercapacitor is appraised by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). The sample displays maximum specific capacitance of 532.55 Fg−1 at scan rate 10 mVs-1. The excellent performance of LaCoO3 electrode offers great promise for high performance pseudocapacitor.