Effect of Current Density on Growth Law of Manganese Electrodeposition

Manganese sulfate solution would be affected by various factors in electrolytic production of manganese. When different electrolysis time was controlled, the effects of current density on the growth law of cathode manganese, the current efficiency, cell voltage and energy consumption in the electrodeposition process were studied. The results showed that too low or too high current density was not conducive to the growth of manganese grains. When the current density was about 450 A/m(2), the manganese grains grew uniformly with spherical morphology and the cathode manganese sheet had high density. The alpha-manganese with good crystallinity and high density was obtained after electrodeposition for 10 h. Under this current density, the current efficiency of manganese deposition was high, the cell voltage was stable, and the energy consumption was low. The average current efficiency was 71.656%, the cell voltage fluctuated between 3.89 and 3.95 V, and the average energy consumption was 5.33 kW h/kg.