Preparation and research of high-performance LaFeO 3 /RGO supercapacitor

In this report, an RGO composite LaFeO 3 material was prepared by a hydrothermal method and calcination method. The structure, morphology, and electrochemical behavior of LaFeO 3 /RGO composites were studied. In the composite, RGO is attached to the porous spherical LaFeO 3 , and the content of RGO has a great influence on the properties of the composite. The electrochemical performance of the LaFeO 3 /RGO sample is the best when the LaFeO 3 :RGO ratio reaches 1:2. When the current density is 1 A·g −1 , the specific capacitance is 367.4 F·g −1 , which is much higher than the sum of the current densities of LaFeO 3 and RGO monomers. In addition, excellent cycle stability with a capacity retention of 89.2% after 3000 cycles at a current density of 10 A·g −1 was obtained. Overall, the electrochemical behavior of the LaFeO 3 /RGO composites confirms the importance of composition adjustment of composites and demonstrates their potential as supercapacitors for energy storage applications.