Electrochemical Properties of MnO2 Nanoparticle Obtained from Waste Battery Powder by Reductive Acid Leaching Method

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Electrochemical Properties of MnO2 Nanoparticle Obtained from Waste Battery Powder by Reductive Acid Leaching Method

June 9, 2021 Physical Science 0

The goal of this study is to extract manganese dioxide (MnO2) nanoparticles from spent battery waste using environmentally safe leaching materials. Atomic Absorption Spectroscopy was used to determine the concentration of metals (AAS). Energy Dispersive X-ray analysis (EDAX), X-ray Diffractometer (XRD), scanning electron microscopy (SEM), and Fourier transform Infrared Spectroscopy (FTIR) were used to confirm the basic composition of metals recovered from dry cell batteries. Both Zn and Mn were higher at 90°C in the leaching investigations, and 4M sodium hydroxide was utilised as a precipitating agent to recover Mn as MnO2 nanoparticle. Cyclic voltammetry (CV) discloses the electrode’s reversibility, whereas electrochemical impedance spectroscopy (EIS) indicates the electrode’s charge transfer resistance (Rct) and capacitance. Among all the electrolytes, the electrode with 0.5M NaOH has the lowest Rct and the highest capacitance, suggesting greater conductivity and confirming that the charge transfer resistance and capacitive behaviour are faster.

Author (s) Details

M. Mylarappa
Sri Jagadguru Renukacharya College of Science Arts and Commerce, Race Course Road, Bengaluru-560009, Karnataka, India.

S. Kantharaju
Sri Jagadguru Renukacharya College of Science Arts and Commerce, Race Course Road, Bengaluru-560009, Karnataka, India.

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