Preparation and Electrical Properties of High Entropy La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O3 Perovskite Ceramics Powder

High entropy La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O-3 perovskite ceramics powder were prepared using coprecipitation method combined with calcination process, and synthesis temperature of the high entropy perovskite ceramics was significantly reduced. The phases and morphology of the ceramics powder were characterized by different methods. The results show that when the calcination temperature is 800 degrees C, perovskite structure with a small amount of second phase was formed in the ceramics powder. When the calcination temperature is 1000., pure perovskite structure is formed in the La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O-3 high entropy ceramics powder. Three electrode system was used to test the electrical properties of the working electrode made from the La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O-3 high entropy ceramics powder, including cyclic voltammetry (CV) test and constant current charge-discharge (GCD) test. At the current density of 1 A/g, specific capacity of the working electrode reaches 154.8 F/g, while the current density increased to 10 A/g, the electrode material can still maintain 47%(73 F/g) of the initial specific capacity. All results indicate that high entropy La(Co0.2Cr0.2Fe0.2Mn0.2Ni0.2)O-3 perovskite ceramics have good rate properties.