Synthesis and electrochemical properties of LaMnO3 orthosized nanomaterial for supercapacitor applications
B. K. Ostafiychuk, H. M. Kolkovska, I. P. Yaremiy, B.І. Rachiy, P. I. Kolkovskyi, N.Ya. Ivanichok, S. I. Yaremiy
Abstract
In this work, the perovskite LaMnO3 material has been prepared based on the sol-gel process of synthesis with the participation of combustion. According to the X-ray phase analysis, it was determined that the obtained material consists of LaMnO3 one phase (space group Pm-3m). Nevertheless, it has been determined that the average size of the coherent scattering region of the obtained material is about 24 nm. Moreover, the average particle size is 40-60 nm in case the approximation that the particles are spherical shape. Thus, it has been determined that the specific surface area of the material is 42.1 m2/g. The electrochemical investigations have been performed using nanosized LaMnO3 powder as a cathode material for electrochemical capacitors. The LaMnO3 material under research showed a specific capacity of 40 F/g at a discharge of up to 1V.