Asymmetric Supercapacitors Based on Co3O4@MnO2@PPy Porous Pattern Core-Shell Structure Cathode Materials

In recent years, supercapacitors have been developed rapidly as a rechargeable energy storage device. And the performance of is depending on electrode materials, preparation method and materials become primary goal scientific development. This study synthesizes Co3O4@MnO2@PPy cathode material with porous pattern core-shell structure by hydrothermal electrodeposition. The result samples are characterized X-ray diffraction transmission/scanning electron microscope, photoelectron spectroscopy. Electrochemical evaluation reveals that electrochemical significantly enhanced PPy depositing. specific capacitance 977 F g−1 at 1 A g−1, retention rate 105%. Furthermore, Co3O4@MnO2@PPy//AC asymmetric supercapacitor assembles AC negative better than MnO2//AC Co3O4@MnO2//AC. capacity 102.78 g−1. still 120% for 5000 charge-discharge cycles.